I have been told by a repair garage that i have a broken flex plate on my 88 yj, at, l6. Check flex plate bolts, teeth and starter before opening up the trans. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. It cannot be seen without removing covers and inspecting. Cracked flexplate how can i tell the chrysler minivan. A competent shop can look at the plate they remove and tell you the cause of the failure. What causes a flexplate to crack twice after two replaced. They will put it on and put the whole thing back together and i should be good to go. Usual failure mode is the crankcase bolts or the torque converter bolts work loose. The part apparently is not expensive, but the labor is a killer. The flex plate in my 1979 300sd parts car had broken and the vehicle had been driven until it would not drive. Jun 19, 2007 what does a cracked flexplate sound like.
These do occasionally crack and will need replacing. Pulled one plug from each cylinder, no damages to the plugs. I have also seen the alignment dowels go missing between the bell housing and the engine block. So check the rear exhaust manifold for cracks as its the easiest to see, and. I dropped the motor in with the flex plate that came with it. I doubt an oil change place can do this and make a determination. Apr 18, 2009 i did this and it gave me access to the flexplate. Excessive crankshaft flange runout or end plate can also cause flexplate cracking.
Well, the problem with that is it appears by only pulling it out 18 did not allow the snout on the converter to fully seat in the crank register, which caused the converter to not be fully supported and centered, which then cracked my flex plate and then also probably messed up my front pump. A bad flex plate usually has failed due to either damage or wear and tear, so replacement with a new flex plate is the only solution. The same things that cause the flexplate to crack can also cause transmission problems. Flywheel flex plate automatic transmission fits 1117 ford f350sd pickup 783062 fits. And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. Apr 22, 2018 i just thought id post a short video of what a cracked flexplate on a 6. Feb 01, 20 it rattles a lot, it sounds like theres a loose bolt in a tin can or something in prnd21 when rpms are over 1500, but goes quiet after shifting gears until it gets revved again.
Sounds like your flex plate had a crack or bolts were not torqued properly or came loose under a normal road test. So i put it up on ramps and got under it to look and its cracked again. If cracks are present, they will usually be in the area of the crankshaft or torque converter bolt holes. I dont know what happened 1st but all the bolts were broken, the flex plate was cracked and about an 18 of it was completely sepearated. You will find that the lip around the outside of the flex plate bottoms against the outside rim of the torque converter.
A reconditioned transmission was installed by a transmission specialist 6 months ago. Cracked flex plate page 2 for a bodies only mopar forum. This leaves nearly a 14 inch gap between the mounting holes in the converter and the face of the flex plate. I dont know if this applies to your loader, but an improperly shimmed starter can cause unnecessary flex and eventually cause flex plate problems too. Jan 19, 2011 i have a cracked flex plate im told i might need a flex plate, torque converter and possibly a front pump bearing cost for parts and labor 2004 gmc sierra 2500 hd close. A cracked flex plate is almost always a sign of other problems. Pics of a cracked flex plate page 2 peachparts mercedes. Personally i have seen people put thousands of miles on a vehicle that has a cracked flexplate.
Turns out the flexplate was cracked all around the bolts holding it to the crank. Those factors ensure that when the engine starts and the driver puts it in drive, the cracked flexplates movement will create a noise. A vital part of an automobile engine equipped with automatic transmission, a flexplate consists of a piece of thick sheet metal that bolts to the crankshaft and torque converter. After about 250 miles, i started hearing a knocking after the motor was warmed up and sitting at idle in park or drive. Notice if the starter has a low, medium or highpitched whine while spinning. A flexplate is a disk that connects the engine to the torque converter. The unwary wont notice especially since it is so hard to see up in there. I opened it up and found nothing but small fragments of what remained of a flex plate. There should be 2 dowels, one on each side, to align the bellhousing of the transmission with the engine block.
I have a 1969 dart, 340, 727, that started making a racket underneath. I packed up and headed inside without being able to crawl under and check the plate. A flex plate is the automatic transmission version of a flywheel. I borrowed an inspection camera to check around the flexplate and hopefully will give me better results. The sun coast a1bfp2 billet flex plate for your 20062010 gm 6. I dropped the trans pan today and the fluid looked good without any shards. I check all the idlers and such, they all look good, sound is louder near the bellhousing. A dial indicator may be used to check symmetrically designed engines. I did not remove the starter and check for loose bolts because i wanted to check with you guys again about that inspection cover. I was able to crawl underneath and look at the flex plate and it is cracked. Sometimes the flex plate will crack and as a result it can cause noise. Feb 05, 2011 i would check and make sure you are not missing the alignment dowells for the bellhousing bolts to the engine.
I have seen a bunch where motor was pulled for said rod knock and broken flex plate was found. Maybe the flexplate or converter bolt is loose and not able to spin freely. If they are missing, or there is only one there, that will get the converter out of alignment with the flex plate and the resulting excessive flex causing the cracking. I was curious i know it been a year just trying to help bro out.
Cracked flexplate how can i tell the chrysler minivan fan. Here is another thing to have the shop check, i have saw flex plates break just like in your photo when the locating bearingbushing for the torque converter has too much clearance material loss due to low clearance or other failure be sure the shop pulls the. Im really not too hip on transmissions, id appreciate any help on this. More severe misalignment can break a flexplate in 15,000 to 30,000 miles. What happened is somehow i got a crack around the crankshaft bolts on the flex plate and it sheared off. A cracked flex plate can also turn on your check engine light, cause stalling and poor running symptoms. It bolts to the end of the crankshaft and the transmissions torque converter bolts to it. Come to think of it, its a good idea to also check the flex plate for cracks. Ford technicians had the car for 3 weeks and eventually found a crack in a cylinder. I tried to start the car again and it struggled, got it to turn over abit but sound like metal was grinding but did not start. Weve had a few forum members get broken flex plates in the last few years. Weve got tough yet affordable flexplates for stock and mildly modified street vehicles. The flex plate dampens this vibration from the engine to the driveline and reduces the noise that we hear. A knocking noise coming from the rear of the engine may indicate a cracked flexplate.
Descriptions of the sound include clanking, chirping and a light knocking. Last time i hunted the exhaust, lifters, bearings, only to find out i had to do the damn flex plate and it only had 2030k on it maximum. Also, the flex plates diameter correlates with the number of teeth it has. I turned the flexplate by prying with a screwdriver in between the teeth. Manufacturer warranty is voided if the flexplate assembly is cracked, broken or separated around the crankshaft andor torque converter mounting areas causes that will contribute to flexplate failure.
I pulled transmission back out to check for cracked flexplate, but looked fine. Aside from a manufacturing defect, the only things that will cause a cracked flex plate are improper torque on the plate bolts at the. When all is said and done, i am getting a new rear main seal on the engine, a new front main seal on the transmission, a new flex plate and a new torque converter. Loose torque converter bolts and cracked flex plates. Start your vehicle as normal, but pay particular attention to the noise of the starter while it spins and engages the flexplate, or torque converter if your vehicle does not have a toothed flex plate. This may occur in worn engines or engine that have been poorly rebuilt. Long story short, will a broken or cracked flexplate cause an engine not to turn over. It did same thing tore off round the bolts leaving a hole in. I noticed a low deep noise i couldnt recognize like it was from the exhaust.
Uncovering an uncommon flex plate issue twice in one week it. Thought they saw a crack in flex plate, i have a warranty that covers the flex plate, i had to authorize the removal of trans for further inspection, but the shop said the spacer looks bad and they found no cracks. I think the shifts are setup too hard on the computer causing the flex plates to break actually. Whats the flexplate of choice for b bodies only classic. Well, 2 flex plates later he figured out what was causing the problem.
What causes a flywheel to crack numerous times justanswer. Flex plates are balanced with both the engine and transmission, so make sure to check the imbalance weight of the flexplate before buying one. Be sure to check the balancer as unwanted harmonics can crack break the flex plate. Well i checked torque converter bolts for loosemess and they were fine no sighns of cracked flex plate what so ever im gonna pop off the valve.
What i would say is, if the failure is around the centre boss, check the plate the bolts pass through is fitted the right way, there is a chamfer on one side and this must face the flex plate. If the flexplate is cracked, replace the transmission fluid pump, flexplate, flexplate bolts and torque converter. Symptoms of a cracked flexplate general discussion modern. Going back to what myanovich was saying, the flex plate is hard to crack. The reason for the sound involves the flexplates location and its function. The broken particles had chewed up the bellhousing, flywheel, and torque converter. But i doubt that, so we will say you have an automatic transmission and this means you have a flex plate, not a fly wheel. A good possibility it is flex plate, your description of the card clicking and sounds like a rod bearing are generally good indications of flex plate cracked broken,with that much noise you ought to be able to see the damage by removing the inspection plate on the trans and rotate the crank by hand turn a full 360 deg to verify.
If your flexplate is warped or cracked, you can usually hear whining or clicking sounds or feel unpleasant vibrations that come from the transmission area. I have a cracked flex plate im told i might need a flex plate. I would check and make sure you are not missing the alignment dowells for the bellhousing bolts to the engine. Made from highquality steel, the flexplate can slightly bend to help the machinery of your dodge ram adjust to changes in rotational speeds. Flexplate failure chevy tahoe forum gmc yukon forum. M said he really doesnt know why the flex plate is cracking, but it would be very unlikely that two different engines would have defects that would cause cracking. Ford technicians had the car for 3 weeks and eventually found a crack in a cylinder head so a brand new engine was installed. Op, youve probably got broken teeth on the flex plate, it is going to need to be replaced eventually, if youre getting an intermittent clicking sound from it just keep an ear on it.
Pics of a cracked flex plate a few months ago, my buddys 84 300d started making a harsh, disgusting metallic sound near the rear of the motor after first making a wooshing sound for thousands and thousands of miles. I pull off the inspection cover and it is so loud im afraid to put my head near the opening. Try loosening the tc bolts to allow the tc to move back slightly and evenly using the bilts to pull it back towards flex plate to allow. The jegstci flex plate might be lighter looking at its shape. What is causing this noise from flexplate torque converter area. There are many things that might cause reocurring breakage. Im assuming this is for your 67 and you have the borgwarner automatic. One of the other mechanics i work with forgot to transfer them over to a new tranny on a car once and it came back in 300 miles with a cracked flex plate. They said the only thing that are waiting on is the flex plate which should be in tomorrow morning. Rattle noise and cracked flexplate 20152018 ford edge. Fit it the wrong way and the flex plate will crack. Broken or loose bolts on the crankshaft end of the flexplate, or on the torque converter side, missalign the flexplate, causing a high side of the plate to strike or rub against internal components. But then if this is the case, then almost all jeep libertys crd with automatic transmission would have had a cracked flex plate. In the past few days my 94 has been knocking while in gear and at low rpms.
A flexplate can crack because of enginetotransmission misalignment or an engine or torque converter that is out of balance. Perhaps someone had the transmission out years ago and failed to torque the flex plate to crank bolts properly. I think my flexplate may be broken and the cause of an annoying rattle. So if you have a knocking noise and an automatic transmission, its a good idea to check the torque converter bolts to see if theyre tight. The part i am referring to is between the torque converter and flywheel, which would. Flex plate transmission flex plate autopartswarehouse. Mar 05, 2019 the dealer performed the typical 100 point check and everything was fine. A cracked flexplate is almost always a sign of other problems. Aside from a manufacturing defect, the only things that will cause a cracked flex plate are improper torque on the plate bolts at the crank and torque converter and the most common cause of transmission to engine misalignment. Gm performance view topic broke my fourth flexplate.
If your transmission is in need of repair, dont compromise the performance and safety of your car with suspect, offbrand replacement parts from the local auto parts chain store. All of the teeth look fine and i cant see any cracks in the flexplate. Lexxani, i believe youre referring to the driveshaft flex disc. Pics of a cracked flex plate peachparts mercedesbenz forum. How to know if a flexplate is warped it still runs. This may be due to a flexplate crack around the crankshaft. Symptoms of a cracked flexplate general discussion. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing. So i heard about your 2007 fx4 busted flex plate replaced 3 times in 20k miles my bro has an f150 fx4 with same issue. Ask to see old, broken or damaged parts because unattached is a peculiar term for a cracked flex. Tranny fluid looks fine, it doesnt slip and theres no loss of power.
If it is a exhaust leak, you can drive it until you get it repaired but it will make s lot of noise. Gm flex plates suffered high failure rates years ago. Most people dont realize when they have a cracked flexplate. The problem turned out to be a cracked flex plate which. I would like to check the flexplate next but i wanted to know if there was a way to do this without dropping the entire transmission. Broken flexplate, again the chrysler minivan fan club forums. Driving it is not recommended by any means and i am not. After some help from jomentum, he diagnosed it was likely a cracked flex plate. I just thought id post a short video of what a cracked flexplate on a 6.
Because the flex plate is an integral part of your cars powertrain, and replacing it involves removing the transmission, a significant amount of labor will be involved. How long can i continue driving with a broken flex plate. While it was quite rusted, i didnt think it was that big of a deal. That had caused it to run slightly off center, which wore a path in the collar on the torque converter. Unfortunately when it sheared off it broke the nose off the torque converter which then in turn took out the front main transmission seal on my trans which let all the trans fluid out of my tranny. Checked inspection plate, no carnage but wasnt able to rotate by hand. My uncle thinks it may be a cracked flex plate from how i described it to him. There are tough flexplatesand there are chuck norriscaliber flexplates. A warped flexplate can make metaltometal contact with the inspection plate cover, or the starter drive mechanism, and can also make a knocking.
And he says he has to pull back the transmission, etc. Based on your description of use, i would stay with the stock flex plate unless it was bent or cracked check near bolt holes. I went to the shop and looked it over and never seen anything like it. Transmission bolts left loose would also be a contributor. It runs fine in park but in any other gear with my foot on the brake it has a very noticeable, almost loud knocking sound.
That in turn was the reason the front seal was not happy. Its possible the rear exhaust manifold or even the crossover pipe cracked and developed a leak. Missing or worn dowel pins or broken transmission case. But yes, maybe at chrysler, they didnt use any adhesive like the loctite threadlocker blue on the bolts. To resolve this concern, verify that the flexplate is cracked around the crankshaft using the inspection plate and a mirror. The day i bought the vehicle, the check engine light came on so i returned it. Cost for parts and labor 2004 gmc sierra 2500 hd i have a cracked flex plate im told i might need a flex plate, torque converter and possibly a front pump bearing. The exhaust sounds more likely which is not related. Cracked flexplates arent as rare on these vans as they are on other cars. The flexplate has cracked twice in the past 6 months. Is there any straightforward way to tell if it is the flexplate without.
Slight misalignment may only cause a single flexplate to break in the life of the vehicle. I thought that was the only problem, so i pulled the tranny and replaced the flex plate, along with the. Crack and a piece missing out of the flex plate visible from the inspection port. Jeep grand cherokee questions is it common for a loose flex plate. The flex plate connects the engine to the transmission.