As mentioned previously, a bad transmission pump can lead to problems with the rest of the transmission, but conversely, other problems with the transmission can be what causes the failure of the pump. I was just wondering how many of you out there with the 4. Can i replace the flex plate by unbolting the transmission and sliding it back or do i need to pull it completely out. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing, during the. The recommended transmission fluid is dextron vi with a capacity of. The flexplate takes the place of the flywheel on automatic transmission vehicles. The cracked hub is a little harder, usually experience with cracked flex. Install the first bolt finger tight then use the starter motor to bump each drive lug into position. If not properly diagnosed it will occur again and often damage to the transmission may follow. Installation instructions th700r4 4l60 transmission. How to know if a flexplate is warped it still runs. Weve got tough yet affordable flexplates for stock and mildly modified street vehicles. Here, you will get a brief idea of what a torque converter is and some of the most common ways to tell if yours is going bad. The 2001 toyota rav4 has 1 problems reported for cracked flex platetorque converter.
A serious crack can cause a mild vibration when driving, so can a faulty torque converter. When you experience a symptom of a bad transmission valve body, it is very noticeable. And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. Mine was inspected through the little inpection hole at the bottom looking for radial cracks, but on full engine removal found it has split into two concentric rings, drive only. I investigated it and it sounded like it was coming from the. Symptoms of a cracked flexplate general discussion. If there is a problem causing it to malfunction then there are some symptoms that your car will exhibit. What causes a flexplate to crack twice after two replaced.
A warped flexplate can make metaltometal contact with the inspection plate cover, or the starter drive mechanism. Cracked flex plate, loose bolt holding the flex plate to the torque converter, spider gears going bad. The th350 is 22 14 from the bell housing to the tail shaft, with 3 6 and 9 tail shafts available. They weld in a spacer for the 235261 crank and then redrill the correct bolt hole pattern. Plate 4 12 zf44 with code a3 year engine dia hub spl pilot mount pilot center to bolt center stall 85on 11 slots stepped 27 1. After checking the flexplate id pull the valve covers to see if theres damage up top that is preventing the engine from turnung over. Cracked flexplate so far in two years, ive had to replace the flex plate three times. The cracked hub is a little harder, usually experience with cracked flex plates makes it easier to diagnose that.
A cracked flexplate is almost always a sign of other problems. Sounds just like when the flex plate on my 200 tdi auto was buggered. Rattles at idle but the force of driving jams the bits together so no rattle when driving. I have seen both of these occur every now and then on the caravans. Descriptions of the sound include clanking, chirping and a light knocking. You can drop the flywheel cover and inspect for missing weights on either convertor or flex plate. These do occasionally crack and will need replacing. A cracked flex plate will usually cause a squeaky sound like a belt but shorter and sharper and changes when in gear or park and under load. Raise transmission and install crossmember assembly then tighten all bolts. Jun 25, 2009 hello and welcome to just answer dodge. Any of these three items could cause your vibration.
Jan 16, 2014 after their repair, it would set a p0741 tcc stuck off, od light flashing, etc. A cracked flex plate will usually cause a squeaky sound like a belt but shorter and sharper. So for a summary, the 700r4 transmission was a 4geared hydraulic automatic transmission with the 4th gear which was an overdrive gear 30% increase. Furthermore, if not properly diagnosed it will occur again and often damage to the transmission may follow. It bolts to the end of the crankshaft and attaches to the torque converter. I just thought id post a short video of what a cracked flexplate on a 6. A flex plate is the flat piece of metal that connects the engine to the transmissions torque convert. Youll be able to customize your profile, receive reputation points as a reward for. The job of a flex plate is to allow for expansion of the torque converter as engine rpm increases. It sounded like a big end knock at idle, went quiet when put into drive. Symptoms of a cracked flexplate general discussion modern. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. Symptoms of a cracked flexplate welcome to modern mopar forum.
Listen for any rhythmic clunking or grinding noise while the engine idles in park or neutral, or idling in gear with a foot on the brake pedal. 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. Issues with low fluid, contaminated fluid, or worn parts can make your pump work that much harder. Sep 19, 2011 trying to determine if the flexplate is bent warped on the 455. We specialize in a widevariety of highquality car parts and accessories for your car, truck or suv. When stripped down, the plate had split around all 6 bolt holes. Theyd had the vehicle for quite some time, but then decided to purchase a remanufactured unit from one of our distributors when repairing the rebuilt unit was unsuccessful. The rotating assembly with flexplateconverter may be thrusting forward. Chevrolet s10 flex plate flywheel plate atp pioneer.
Being an auto, it will be fluid balanced by the torque convertor, so babancing it wont be an issue. So, following on from my breakdown the car, then nearly me. The reason for the sound involves the flexplates location and its function. Nov 04, 2019 top 4 bad transmission valve body symptoms.
After their repair, it would set a p0741 tcc stuck off, od light flashing, etc. Here, you will get a brief idea of what a torque converter is and some of. A problem with your flex plate can be very dangerous. Then whom ever replaced the fp before me didnt catch the peened bellhousing and tightened it down causing a alignment problem. Symptoms of a bad flex plate on a 2003 dodge grand caravan. There should be 2 dowels, one on each side, to align the bellhousing of the transmission with the engine block. You really should check the end play on the crank using a dial indicator should measure 0. Most of the time youll have to have the driveshaft shortened. I have the back seats out so there isnt too much sound dampening back there, and i have been listening for any odd noises over the past few weeks. The constant expansion and contraction of a flex plate over time can result cracks andor shearing of the flex plate. Worn, cracked or broken transmission andor engine mounts should be replaced. Usual failure mode is the crankcase bolts or the torque converter bolts work loose, allowing the parts to start moving in different directions, the clicking sound you heard. I have also seen the alignment dowels go missing between the bell housing and the engine block.
Noise the classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. The engineer put a triangular file on it and had no trouble marking the plate, he said it is just plain old mild steel, and welding would be no troubles. These nonsfi rated small block chevy flexplates are suggested whenever installing a new engine or transmission. Atp automotive z270 automatic transmission flywheel flexplate. The flex plate replaces the flywheel in automatic transmission cars. This 153tooth flexplate fits 198697 externally balanced sb chevys such as 4. There are a couple of symptoms that can be related to a bad flex plate, 1 is a noise concern sraping, clicking type noise and 2, a misfire caused by cracks in the plate near the area where the flex plate bolts to the crank. This ocurred after i filled the transmission with fluid. 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. I just always assumed it was an exhaust leak or loose header. I was driving along the m4 on my way to an important appointment, doing about 60mph in drive, 2500rpm on the possibly inaccurate tachometer, tc locked it locks at 45mp. The sound is very similar to a bad engine rod and is often misdiagnosed. As i was driving into work this morning i noticed a sound that seemed to come from the middle of the car.
Most have teeth around the edge for the starter to engage into when starting your car. Because your flex plate transmits the power from your engine to your transmission, your ability to control your vehicles power can be affected. The first cracked fp for me i ignorantly assumed the missing torque converter bolt was the problem so i missed the bellhousing problem. The purpose of this article will be to help you distinguish which is more likely to have gone bad, the torque converter or the transmission. When a flexplate cracks, it often produces a loud knocking noise as it rotates. Nov 03, 2011 so, following on from my breakdown the car, then nearly me. What determines what flex plate you need is the starter. I seldom use a 153 tooth flexplate because i feel that the 168 tooth flexplate or flywheel can turn the engine over better more power but less speed.
The flexplate has cracked twice in the past 6 months. There are tough flexplatesand there are chuck norriscaliber flexplates. Chances are that you wont let it go for too long because it will greatly impact your driving ability and will likely frustrate you while trying to change gears. A dropped bolt will definitely make noise but the noise typically doesnt last long since something breaks. Top rated products in automotive replacement flexplates. 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. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. Feb 11, 2011 dude, looking at your questions for the past 2 weeks, you should give up trying to fix your own vehicle. My problem is i have a slight scraping sound inside the transmission bell housing. Aside from a manufacturing defect, the only things that will cause a cracked flex plate are improper torque on the plate bolts at the. I was driving along the m4 on my way to an important appointment, doing about 60mph in drive, 2500rpm on the possibly inaccurate tachometer, tc locked it locks at 45mph with the 1. Mine was cracked all the way around the center mounting holes shop the new one is like. Search our online flex plate catalog and find the lowest priced discount auto parts on the web.
Jun 26, 2008 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. After installing the remanufactured unit, the same code and symptoms returned. Damaged and leaking front seals and front transmission pumps are common symptoms. The transmission mount location on the 700r4 is also a. I have a 1969 mach i mustang with a 1968 390 fe motor 4bbl original 428cj. Not warranty a unit that shows signs of low pressure or fluid level. Register now to gain access to all of our features. The 700r4 is 24 from bell housing to tail shaft with a 6 tail shaft. Oct 29, 2006 700r4 torque converter spacing to flex plate i just installed a 700r4 to a 350 chevy, with the torque converter in place, pushed as far back on the shaft as it would go there was a gap between the torque converter and the flex plate, about 12 inch.
A properly working torque converter is something your cars transmission needs to function. A couple of weeks ago i started to get a clicking sound that would speed up slow down with engine speed, but i just assumed was the exhaust. It bolts to the end of the crankshaft and the transmissions torque converter bolts to it. Attached is a video of the startup and idle of the flexplate disconnected from the torque converter. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing, during the operation of the engine, flexplate. Dude, looking at your questions for the past 2 weeks, you should give up trying to fix your own vehicle. Often people think that their transmission is going out, because the symptoms of a bad tour converter are so similar to the symptoms of a bad transmission. A cracked flex plate is almost always a sign of other problems. The flex plate could also have cracked at the crankshaft hub. The same things that cause the flexplate to crack can also cause transmission problems. Oct 19, 2008 sounds just like when the flex plate on my 200 tdi auto was buggered.
A bad flex plate could potentially cause a loss of power to the wheels and result in an accident. Bad torque converter vs bad transmission drivetrain resource. From what the po told me, the motor is a 350 from a 72 monte carlo. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. Torque converter identification catalog tcs products.
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