Torque Converter Rattle Under Load

If you rev the engine in Park or Neutral, what do you find? It won't ping under this condition, but torque converter rattle may still be evident. mine wouldnt burnout till i got the timing dead on!!!!. Hey gang, I have a 2008 , 6spd with 9k miles. Re: 94 Silverado 5. Our analysis shows that the shaping of the engine transient by the torque converter before reaching the clearance locations is more critical. The slots on a good converter are. I checked the bolts connecting the torque converter to the flywheel and they are all tight and the sound seems to go away when you bring it off idle like when its under a load. It occurs at low RPM 850-1200, and under a load (in D or R with the brake pressed) The noise is easily reproducible. The transmission pan should be cleaned out, the TCC solenoid (3C3Z-7J136-BA) and external fluid filter replaced, and the cooler flushed and flow checked. Was browsing some of the posts and saw that many were experiencing the exact same problem my 325 xi (88,000 miles on the car)was having. Owners' Feedback - Taken from sources throughout the Internet. Honda Accord: Why is There a Grinding Noise When I Accelerate? Are you hearing grinding noises coming from your Honda Accord? This article will show you how to trace the source of the noise, and the different ways to address it. Neither of these converters in question were built by me, however, I have done extensive research in to his claims, even speaking with his current torque converter builder, and have found no credit to this claim. It sounds like you are unsure if it is chain rattle. Stick-Slip Behavior of Torque Converter Clutch. You will find here helpful information about the GM Chevrolet 350 (5. How loud is this converter rattle? The noise I hear is noticeable driving down the road with the. engine knocking If your engine makes an annoying knocking, pinging or rattling sound when you accelerate or work your engine hard with a load - like driving uphill, passing a slowpoke or towing a trailer - then you're probably experiencing spark knock. There is also a TH350C and TH250C version that has a lockup torque converter (TCC). We towed our caravan up to ST Andrews but I noticed about an hour or so into the journey when I pulled away from a junction or roundabout I got a slight rattling noise from the near side rear but once up to speeed it seemed to di. Rattle is definitely coming from the transmission torque converter area. High engine Load on Trailblazer should hear it pretty good if you get under the vehicle. Essentially as I pull away under load I can hear the ticking a few times a second that gets a bit faster as revs increase. I was able to identify where the noise was coming from by using a stethoscope with a rubber hose. 2]) in a synchronous buck converter. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. 11 Diesel Truck Failures You've Got to See to Believe. I had this happen on my '91 Sub a while ago. I had someone look at my car a few weeks ago and after having it in service for two days and four road tests he came to the conclusion that its the torque converter. But sounds like it's under the jeep. Ford Torque converter Bad sounds. If I put any sort of load on the engine it goes away. LuK high-performance torque converters are developed and manufactured in Germany and in the USA. The engine model (Figure 3) consists of a rigid crankshaft coupled to number of crank mechanisms. hi , just joined today , hoping someone can help , ive not long bought a 2. Is it tinny such as an air cleaner snorkel rattling against a solid object as the engine moves about on its mounts? Dose this noise only manifest when sitting in gear idling at a light, and when a load is placed on drive train dose it go away? Try to describe the sound in more detail, and where it appears to be coming from for us. I do not think its the transmission or torque converter causing this issue. Why driving to grab some grub, I pulled in to parking lot and with no accessories on, it started vibrating hard. Truck stalls when coming to a stop. Since you already replaced the fluid, replace the switches to buy yourself some time to start saving up some cash. If a thud is heard, the flywheel may be loose or damaged. My torque converter is making a clanking or rattling noise at idle. Then I go back to say it's the chain or possibly stripped splines on one of the clutch cones. Rattling sound on acceleration. 68 302 - rattle under heavy load and high RPMs I could hear a rattle (i belive under the hood). Â It is common with 99's. If a piece breaks off, you may hear a rattling in the. It's why a worn or faulty pump makes a whining noise in all gears, including park and neutral. I had this symptom and it drove me crazy. Took off the inspection plate, and no loose bolts on it, or anything I could see. The 11&1/4 converters stall anywhere from 2100 as the lowest reading I have gotten up to 2600 at the highest. it not there when the car is in park or when giving it some throttle with the brakes on. I was directly under the TC and it was noisy right above me. Excessive crankshaft end play is indicated by an intermittent rap or knock sharper than a worn main bearing. under a Harmonically Varying Normal Load, Journal of. My problem is; I have a LOUD single knock or rattle in engine at 'exactly and above 2500+ RPM'. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation. Mine sounds like a a Howling, Growling noise under partial Throttle. Even the same station can source gasoline from different vendors, so this is an issue that you might still occasionally run in to, despite the best of intentions. Chevrolet Silverado 2007-2013: Transmission Problems and Diagnostics. 2]) in a synchronous buck converter. Sometimes it makes noise under very light load, like cruising through town, or when coasting, and only when the converter is unlocked. Perrya knows a fair amount about the Corvair, America's aluminum-engine classic car. It kind of happens all the time, cold or hot, and when under load. 4L, 3-valve engine may exhibit a ticking and/or knocking noise after reaching normal operating temperature, or may exhibit a rattle upon starting. Lower the vehicle. If making sure that the advance is right on the timing and good gas doesn't cure it I'd be thinking that I needed to take a serious look at the valve train. This sounds more like a rattle. I've been concerned it is the torque converter because when driving I often get a smell of a clutch burning up. The converter is working as designed. Engine Rattle I, too, have a chatter coming from the engine but it only occurs when I switch the A/C on and off. Easy to use parts catalog. :rolleyes5: Kenny had me worried. Torque converter shudder in 4th while lockup is engaged; problem goes away when the brake pedal is pressed slightly to unlock converter. How to distinguish torque converter knock from piston slap? The engine knocks loudly under load after cold start, especially if oil level is low (the lower the oil level, the louder the knock). under a Harmonically Varying Normal Load, Journal of. It was the blots holding the flex plate to the torque converter. Best thing to do would be get the car to a local garage where you can raise the whole thing, then get somebody to stand underneath while adjusting the. the bolts were tight but it looked like they were aprox 1/16" from making contact. Read more and see pictures at Car and Driver. I must admit, the issue of pinging did cross my mind as I began to read this thread. I was directly under the TC and it was noisy right above me. Large cubic inch displacement engines and engines with long throw crankshafts produce high torque outputs. It could indicate the last stage of the converter’s life. its done nearly 300,000ks. My problem is; I have a LOUD single knock or rattle in engine at 'exactly and above 2500+ RPM'. Did not see anything that seemed obviously wrong with flexplate. I am also having a similar situation. Â It is common with 99's. Has anyone ever heard of the flexplate knocking against something, or the torque converter knocking as it fails?. Since you came back and added that you now think it's there all the time, just worse under load when it's in gear, I'm still inclined to think CAM phasers/VCT. Put your hand on top of the injector harness with the engine running and you will feel the 'rattle'. Come to find out, the noise is in the tranny - or that's at least where the noise is the loudest. The only things that changes the rattle is to increase RPMs to over 1200, and the rattle will slightly decreases after the engine warms to operating temperature. Should the torque converter have a rattle sound to it? When I pick it up and tilt from side to side, I think the turbine is rattling around in there. Sometimes its bad enough to rattle the dash. Torque converter shudder in 4th while lockup is engaged problem goes away when the brake pedal is pressed slightly to unlock converter. That means it isn't perfectly lined up, and there's a rattle or knocking noise that happens under load. Average repair cost is $1,570 at 84,850 miles. 1994 Model Year Dodge Vibration or "miss" as torque converter clutch from under vehicle or fuel. If a thud is heard, the flywheel may be loose or damaged. He may have the infamous VIG converter. i need to know if the converter could be. Customer indicates that the vehicle has a slight moan, drone, buzz or rattle noise from the exhaust that occurs under light load (1400 - 1700 engine RPM) and vehicle speed between 60-100 km/h (40 - 60 mph). Try starting your Corvette. The most usual problem with torque converters is damaged or worn needle bearings. Gear rattle, which may be idle rattle and/or in-gear rattle, occurs when unloaded tooth flanks of meshed gears bounce against each other. I have noticed that when the vehicle has warmed up that I get a shudder when accelerating from a full or rolling stop. Torque converter noises are easy to isolate. It's quite metallic and not as consistent as rod knock is as the crank swings around. This may sound crazy but a few years back I installed a brand new TCI trans and converter and when I started the car it ran great and I had it on jack stands for the initial run through the gears and it seemed find and then we dropped it down and tried to go for test drive and as soon as I put it in 1st gear the nose dropped and the car chugged. The car changes gear just fine, manually selecting them or automatic. Find 18 HP Torque Converters related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of 18 HP Torque Converters information. Find Jcb Torque Converters related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Jcb Torque Converters information. Large cubic inch displacement engines and engines with long throw crankshafts produce high torque outputs. This will fully apply the torque converter clutch. Have a shop verify line pressure, and provided no valves in the TCC hydraulic circuit are worn, replace the torque converter. And what i meant by loose metal, it actually sounds like pieces of metal floating inside in the oil, i may even cut the converter open and check it out. Apr 29, 2013 #1. High durability on clutch is demanded under severe conditions, for centrifugal force load occurred from rotating and torque load during oscillation absorption as well as characteristic change occurred from friction wearing. When the transmission is in gear and the drive wheels are stationary, the turbine in the torque converter doesn’t spin, because the turbine. it not there when the car is in park or when giving it some throttle with the brakes on. Under this condition, the transmission is directly driven by the engine. Very often the problem is a torque converter shudder. A bad torque converter could be the origin of rattling sound when accelerating at low speed. I Have a 2005 F150 V8 FX4 Lately I have been hearing two strange noises from my the undercarriage of my 150 This noise does not happen often but on some occasions (maybe once a week) I hear what sounds like a chain dragging or rattling under the truck. I have replaced my front axle u-joints, ball joints and varified that my rear end did not have too much play. If you keep your foot on the throttle when changing gears the engine will be under load when you make the change so when the clutch re-engages it will "thump" the torque converter rather than letting the torque converter do it's thing properly. converter and large capacity fluid pump for optimized cooling and durability. 127000 mi US $42: Replaced failing torque converter. Once it even happened when the motor was still warm enough so that I could feel the heat rising off engine as I sprayed into air intake. In Park or Neutral, the noise disappears because the whole unit is spinning. Is a Clutch right for my Go Kart. it only rattles when im starting it up or giving it gas. 68 302 - rattle under heavy load and high RPMs I could hear a rattle (i belive under the hood). Torque converter was replaced and the transmission was re-flashed back into a learning mode. That tapping noise is normal and will disappear after the engine is warm (10 minutes). There is no other torque converter offered anywhere that can make this claim. Mine rattles the loudest at certain engine loads. converter but the noise still persists. At idle there is also a "bearing noise" when the transmission is hot and in drive. It will be a faint sound when the car is idling in 'park' mode, but the volume and frequency will increase in proportion to acceleration. Cruising its silent. Quizlet flashcards, activities and games help you improve your grades. Lost my torque converter on a trip to Memphis. Helpful information and resources on Ford tractors from SSB Tractor, a leading provider of tractor parts, manuals, implements and toys. A bad torque converter could be the origin of rattling sound when accelerating at low speed. The truck was under a platinum TEC policy on it and at 95000 miles the rep agreed to cover the entire tranny. I had this symptom and it drove me crazy. TripleLok Torque Converter, 1989 to 2003 Ford 7. Or just throw $ at it and do a tranny service. This type of noise can be caused by meshing impacts, parametrically excited vibration or rolling contact noise due to variations in pitch spacing. It was the smog diverter diaphrams that were toast because the check valves in the air injection manifold had burnt through cause of age. I bought my 2011 RAM used last year and I'm noticing this, "growling noise", coming from what sounds like the area of the torque converter/transmission tunnel. Worn down hub slots:. Chapter 10 Automotive Clutches, Transmissions, and Transaxles study guide by OQuinn1 includes 35 questions covering vocabulary, terms and more. Torque converter bearing? 700R4 with 9. When you shift your car into drive, neutral, or reverse, if you're hearing loud clunking noises, it's possible the torque converter is the root of the trouble. I've heard of a higher stall converter chatter a little bit but a good friend of mine just ordered the same rebuild kit for his 5 sp with the same converter and his doesn't make any noise at all. Haven't heard it yet when just accelerating medium-ish to get on a freeway, or jumping on it from a stoplight. I am the proud new owner of a 2005 Liberty CRD. A tech article on how to get power to the ground with your Powerglide Automatic Transmission. Nevertheless. While there is one power-diode ([D. While it's not just flopping around in there, I CAN pull the drive shaft down and make those plastic ribs touch the outer surfaces. When there are problems with engine bearings, the vehicle will demonstrate a few tell. I haven't worked on automatics in about 10 years and I forgot some details. The system can be also specified with a torque converter for use in heavy-duty prime mover applications. I had this symptom and it drove me crazy. there is a loud rattle when the engine is at idle. I hauled the car today about 60 miles and the truck performed flawless. A lot can go wrong with an automatic transmission. For example, a 4T60 has a noise in neutral and while driving down the road. Has anyone ever heard of the flexplate knocking against something, or the torque converter knocking as it fails?. Torque converter shudder in 4th while lockup is engaged, problem goes away when the brake pedal is pressed slightly to unlock converter: Have a shop verify line pressure, and provided no valves in the TCC hydraulic circuit are worn, replace the torque converter. Rattles on acceleration, around corners and is more noticeable when feathering the throttle under load. When the transmission is in gear and the drive wheels are stationary, the turbine in the torque converter doesn’t spin, because the turbine. These two switches positioned one under the other are switched synchronously in a way to complement each other [3,4]. 71 overdrive fifth gear ratio enhances overall vehicle efficiency. Any ideas what this could be. You said it doesn't do it with low range in neutral? Revving in Drive is going to make the engine fight against the brakes. Essentially the TC installed at the factory wasn't up to the job of handling the immense torque put out by the 2005 and later CRD engine (400nm of torque) and those cars driven under high load (heavy throttle or towing for example) started experiencing failures. For those of you who get the shudder at or around 60 - 65 mph (the speed at which the torque converter locks up to save on fuel economy) I would recommend having your transmission fluid replaced. I remember a thread about how the torque converters will rattle and eventually fail, I'm thinking this might be it. Im going to try to get under it this weekend and take of the bottom cover/shield and look up in that area and see if i see or feel anything. This may be due to a sticking torque converter control solenoid. High pitched sqealing niose when engine is under load (2008 Ford F-350 Super Duty) When your driving and put the engine under a load it makes a squealing noise almost like a bearing going out. A question on your timing numbers, is 34 degrees total timing or at idle?. Essentially as I pull away under load I can hear the ticking a few times a second that gets a bit faster as revs increase. 2000 Dodge Ram Technical Service Bulletins. E46 330i rattle under acceleration. I do not think its the transmission or torque converter causing this issue. I lived with mine for a year and pursued all available channels for a fix. I hauled the car today about 60 miles and the truck performed flawless. This type of noise can be caused by meshing impacts, parametrically excited vibration or rolling contact noise due to variations in pitch spacing. I discovered that it was the sound generator was causing the issue. Inspect the operation of the EGR valve, and check for a buildup of carbon deposits. Engine Noise Under Load was created by druggernaught just wondering if you might be able to tell me a little more about this engine noise i am getting when driving the my 1990 Toyota Corolla 1. It is barely gripping, and cannot engage under load, but once the load decreases it can engage. I have a 1967 Dodge with a 440 Magnum engine with a stock rotating assembly (with the exception of six pack pistons), a moderate cam and performance build that makes about 450 BHP and 500 ft. Now when the engine is started it makes a clunking - rattling noise. Tin sort of a sound. If the torque converter is loose it can do alot of damage to the transmission too. American Honda investigated the judder and found that the torque converter was not causing the judder; rather, it was caused by deteriorated transmission fluid. An engine-dependent PTO module is also available, which is installed between the transmission and the vehicle’s engine. Engineering Explained: Clutch Basics And Performance Clutches. If you rev the engine in Park or Neutral, what do you find? It won't ping under this condition, but torque converter rattle may still be evident. Includes solutions to these problems, advice on preventing them, and how to increase the reliability of the 6. The engine bearing in your vehicle refers to either the engine's main bearings or the rod bearings. I never heard it until someone i work with pointed it out. Here's how to test your torque converter:. rattle from engine under higher load. I almost junked and engine due to noise under load and it was loose torque converter. Was worried it was flywheel or torque converter or. 68 302 - rattle under heavy load and high RPMs I could hear a rattle (i belive under the hood). ATS 5 STAR TRIPLE-LOK 2003-07 FORD POWERSTROKE. out wheel bearings missing anti-rattle. 50: Sonnax’s improved Manual Valve #22771-09 is a cure for delayed gear engagement and no fluid charge to the torque converter in Park. This may be due to a sticking torque converter control solenoid. A tech article on how to get power to the ground with your Powerglide Automatic Transmission. The sound is similar to piston slap, i. th350 makes a rattling sound Drivetrain & Performance. The energy dissipated within the torque converter is minimized to enhance the fuel efficiency. my first thought was maybe the heat shield ? so with that i went upon my afternoon completely forgetting about it ,But than when i got home. Used red loctite on everything, all bolts are tight, billet goerened flexplate installed. Why 2016 & 2017 Chevrolet Camaro owners are furious over a rattle sound Chevrolet says they have a fix for the mysterious rattle sound coming from the rear of the performance car. The problem is under load you do get. We've seen a lot of cool stuff in our years being involved in the diesel industry. If you rev the engine in Park or Neutral, what do you find? It won't ping under this condition, but torque converter rattle may still be evident. The problem of judder and rattling in Berger, [2] concluded that combination automotive transmissions have remained the of velocity dependent friction and a “harmonically varying normal force” (resulting from, for instance a rough surface) might produce torque coefficient) plate at this location is fluctuations. For an automatic transmission with a torque converter, the torque converter itself can act as a fluid damper, since it is a hydrodynamic coupling. Too new to really be considered coveted and yet old enough that they've likely gone through several owners, they're prime candidates for affordable wheels. Anymore acceleration to speeds beyond that do not make this sound. Our Universal, Direct-fit, CARB, High Performance and Diesel converter lines cover over 100,000 applications, including OBDII coverage for all 50 states and are certified in 58 countries around the world. clutch and torque converter noise that happen in rhythm with the crankshaft. Iavoid most of that with clutch control though. Torque converter noises are easy to isolate. It has been thoroughly discussed at Edmunds and there is really no fix that I've heard of except that Honda is "working on it". Under load (the more torque, the more shake), the front vibrates. It drives fine, changes gear and does everything an automatic gearbox should do except when in park and neutral there is a rattling nose coming from it. Hey gang, I have a 2008 , 6spd with 9k miles. Is there a TSB for the torque converter for the 5EAT? 2011 outback 2. Lower the vehicle. Check for loose bolts on the torque converter. The rattling sound is temporary and goes away when I reach 30 - 40 mph. The next morning I started the truck and there was no knocking sound. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. Accelerate slowly in drive and listen to whether the torque converter noise will get quieter as the vehicle moves forward. The rattling sound is temporary and goes away when I reach 30 - 40 mph. th350 makes a rattling sound Drivetrain & Performance. If a piece breaks off, you may hear a rattling in the. The shudder/rattling is becoming noticeable when in auto mode switching gears from 4 to 5 and speed is between 30-43Mph. This noise is most pronounced when the engine is hot, and is not affected by engine load. Inspection With engine running at operating temperature, check for coolant, fuel or lubricating oil leaks. VERY Slow up hills and tell me about Torque Converters. the most comprehensive guide to torque converters in the. Essentially as I pull away under load I can hear the ticking a few times a second that gets a bit faster as revs increase. dealer contacted ford, and ford states," do not replace the torque converter and that at the current time they are aware of the problem and attempting to come up with an engineering solution. 0L Power Stroke diesel, including clogged EGR valves, sticking injectors, blown head gaskets, and other documented failures. Also, Lubegard Shudder Fix will at least fix this for awhile. Let me know, thanks!. One technician listened with a stethoscope (while another put the car under load) and believes it's the torque converter. It was the blots holding the flex plate to the torque converter. Average repair cost is $1,570 at 84,850 miles. Rattling Meshes in a 5 -Speed Manual Front and Transverse Mounted. Volkswagen Buyers Guide -- 2000 Volkswagen Jetta 4dr Sdn GLS TDI Auto pricing, mpg, engine, transmission. I hauled the car today about 60 miles and the truck performed flawless. Under high load, low RPM situations, such as accelerating in OD (torque converter locked up), there is a vibration, I can feel it through the floor and even up through the steering wheel. No lights came on during this 3 hour trip and the torque converter was locking and unlocking the entire way. Why would a loose torque converter only rattle at high engine speed. A continuously variable transmission (CVT) is a type of automatic car transmission system that uses a pulley and belt system to provide an unlimited range of gear ratios. torque converter. Transmission Fluid and Filter Service. Transmission and torque converter replaced. there is a loud rattle when the engine is at idle. Re: A new noise developed in my oil pan - care to help diagnose it? Nice thing about the real thick weighted flexplates is they tend to generate more lowend inertia/torque, which is great for rock crawling. I never heard it until someone i work with pointed it out. shim will make approx 25 thou. Is it tinny such as an air cleaner snorkel rattling against a solid object as the engine moves about on its mounts? Dose this noise only manifest when sitting in gear idling at a light, and when a load is placed on drive train dose it go away? Try to describe the sound in more detail, and where it appears to be coming from for us. 5" 2800 stall converter. This rattle is very difficult to isolate and can be related to the flex plate, the inspection cover, the camshaft sensor, the line control valve (review above) or the converter piston. Mega-horsepower sled pullers, 1,000-rwhp street trucks, 10-second quarter-miles the list of positives goes on and on. I do not think its the transmission or torque converter causing this issue. 51: Sonnax Manual Valve (top) has precise passageways for charging the torque converter in Park mode. The wires don’t have to be hooked up on a 1985 up transmission. T-Ratchet + Ti-Torque The worlds lightest mobile torque wrench with the Ti-Torque Tube weighing in at just 30g! The complete set comes with a bit extender for bolts over 8nm and loosening fasteners. This article applies to the C5, C6, and C7 Corvette (1997-current). A judder from the torque converter lock-up clutch may be felt while driving between 20 and 60mph. Mine sounds like a a Howling, Growling noise under partial Throttle. 98/99E-vans built after 1-5-98 and 99 F-series with 4R100 (E4OD) auto trans--rattle/scraping noise from bellhousing is caused by the torque converter. Automatic Transmission Torque Converter by Dacco®. + view details; may 01, 2019 - alberta, va - power train at less than 40,000 miles the car started making a very load rattling noise when idling. the most comprehensive guide to torque converters in the. I've heard of a higher stall converter chatter a little bit but a good friend of mine just ordered the same rebuild kit for his 5 sp with the same converter and his doesn't make any noise at all. Its most prevalent while hauling my camp trailer (~4500lbs). i let it go for a while but now it just annoying me. Sounds like it's coming from around the back of the pan. I lived with mine for a year and pursued all available channels for a fix. plus labor to install it. 1995 Dodge Ram Truck Technical Service Bulletins. Isolating the cause of rattles can be the difference between an enjoyable Sunday drive and your worst on-road nightmare. When I rev the engine it smooths out and almost stops but at idle or in gear it really rattles. Alright, I understand the troubleshooters suggestions, and could all be relative, but they are off. A bad torque converter could be the origin of rattling sound when accelerating at low speed. Buy TripleLokᆴ Torque Converter - 1989 - Early 03 Ford E4OD / 4R100 at Alligator Performance. Engine bearings protect and support the connecting rod or crankshaft, enabling it to spin freely in the engine. 2011 f150 rattle solved when engine was under load at low speeds and shifting between first and second. You said it doesn't do it with low range in neutral? Revving in Drive is going to make the engine fight against the brakes. Crawl under. The truck "ONLY" makes the noise when in Park or Neutral when the engine is "NOT" under a load. An engine-dependent PTO module is also available, which is installed between the transmission and the vehicle’s engine. What would be inside the housing that these bolts might be rubbing on to cause this tin sounding rattle? The trans shifts smooth and seems to be working great but this rattling is driving me nuts. If it’s an automatic and stops when put in neutral, that would be another suggestion of an exhaust rattle. The shudder is now gone, but has been replaced by a number of other symptoms. To me this sounds more like out-of-whack timing than an exhaust rattle… but the fact that it only happens when stopped points to the exhaust. Sounds and feels like running over a rumble strip on the shoulder of a highway. The noise goes away when the transmission is in gear and the vehicle is stationary. Now its just the griding noise. Something while under load. Service Information (SIT) Expansion tank sealing rings E36 M50 M52 with ASC+T Applies to: AUTO, MANUAL NOT USA. ill check the flex plate but before i put it in it all looked good. Â You get a loud rattle like it is underneath the truck. When I am driving, say in the 10-30 MPH range and the engine is under a moderate load, like going uphill, I have a fairly noticable ticking/clicking/rattling noise that comes from underneath my car. Also, This lowers combustion temperatures and prevents knock. With the converter locked or under throttle there is no noise or anything at all. Under this condition, the transmission is directly driven by the engine. Explore the physics, engineering, design and general guidance of the GM Chevy 350 engine. Four Common Car Noises, Their Causes, and How to Fix Them noise gets louder as RPM's increase under a load. Now when the engine is started it makes a clunking - rattling noise. its done nearly 300,000ks. Engine mounts & dogbone, or your torque converter. If it's an automatic and stops when put in neutral, that would be another suggestion of an exhaust rattle. This noise is loudest when the engine is under heavy load. If the noise disappears, broken flexplate around the crankshaft hub. As soon as I shift to neutral or park it goes away. I am still having some serious vibration under torque while accelerating and decelerating. 3 engine noise at idle and while under low rpm load The flex plate is bolted to the torque converter inside the transmission bell housing. The builder had to use some sort of spacers, or it would rattle and eventually crack. Even with the P-series chip under hard accel from a dead stop up to about 60 mph the EGT's only went to 525 post turbo. The energy dissipated within the torque converter is minimized to enhance the fuel efficiency. Check for fluid leaks. 7L) motor and its use on boats, trucks and passenger cars. Cracked fly wheel usually gets louder as it gets hotter, or under heavier load. Live in a cold climate area and this problem occurred most recently for the past 2-3 months. The problem wasn't the gearbox itself but with the torque converter. -2010 F-150 4X4 supercrew. Under load the bolts get forced to one side of their hole. - New Durham, NH, USA. if i hold the brake and depress the throttle the rattle either quits or dimminishes.