Rattles at idle but the force of driving jams the bits together so no rattle when driving. 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. Most of the time youll have to have the driveshaft shortened. The sound is very similar to a bad engine rod and is often misdiagnosed. Furthermore, if not properly diagnosed it will occur again and often damage to the transmission may follow. A flex plate is the flat piece of metal that connects the engine to the transmissions torque convert. You can drop the flywheel cover and inspect for missing weights on either convertor or flex plate.
Feb 11, 2011 dude, looking at your questions for the past 2 weeks, you should give up trying to fix your own vehicle. Jan 16, 2014 after their repair, it would set a p0741 tcc stuck off, od light flashing, etc. A cracked flex plate is almost always a sign of other problems. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. Worn, cracked or broken transmission andor engine mounts should be replaced. Cracked flexplate so far in two years, ive had to replace the flex plate three times. There should be 2 dowels, one on each side, to align the bellhousing of the transmission with the engine block. A properly working torque converter is something your cars transmission needs to function. 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. Installation instructions th700r4 4l60 transmission. After installing the remanufactured unit, the same code and symptoms returned. Symptoms of a cracked flexplate general discussion. Issues with low fluid, contaminated fluid, or worn parts can make your pump work that much harder. 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.
The th350 is 22 14 from the bell housing to the tail shaft, with 3 6 and 9 tail shafts available. Search our online flex plate catalog and find the lowest priced discount auto parts on the web. These nonsfi rated small block chevy flexplates are suggested whenever installing a new engine or transmission. Cracked flex plate my runner has been making a ticking noise when warmed up for the last 20k miles. Sep 19, 2011 trying to determine if the flexplate is bent warped on the 455. 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. This 153tooth flexplate fits 198697 externally balanced sb chevys such as 4. Jun 25, 2009 hello and welcome to just answer dodge.
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. 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. The same things that cause the flexplate to crack can also cause transmission problems. Then whom ever replaced the fp before me didnt catch the peened bellhousing and tightened it down causing a alignment problem. If there is a problem causing it to malfunction then there are some symptoms that your car will exhibit. The problem turned out to be a cracked flex plate which. Weve got tough yet affordable flexplates for stock and mildly modified street vehicles. The flex plate could also have cracked at the crankshaft hub. It sounded like a big end knock at idle, went quiet when put into drive. 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. After checking the flexplate id pull the valve covers to see if theres damage up top that is preventing the engine from turnung over. The rotating assembly with flexplateconverter may be thrusting forward. It bolts to the end of the crankshaft and attaches to the torque converter.
The cracked hub is a little harder, usually experience with cracked flex plates makes it easier to diagnose that. I have a 1969 mach i mustang with a 1968 390 fe motor 4bbl original 428cj. The reason for the sound involves the flexplates location and its function. Here, you will get a brief idea of what a torque converter is and some of.
And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. A warped flexplate can make metaltometal contact with the inspection plate cover, or the starter drive mechanism. This ocurred after i filled the transmission with fluid. 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. Chevrolet s10 flex plate flywheel plate atp pioneer. You really should check the end play on the crank using a dial indicator should measure 0. My problem is i have a slight scraping sound inside the transmission bell housing. The constant expansion and contraction of a flex plate over time can result cracks andor shearing of the flex plate.
Noise the classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. A serious crack can cause a mild vibration when driving, so can a faulty torque converter. When a flexplate cracks, it often produces a loud knocking noise as it rotates. Sounds just like when the flex plate on my 200 tdi auto was buggered. Nov 04, 2019 top 4 bad transmission valve body symptoms. 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. Register now to gain access to all of our features. 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.
The 700r4 is 24 from bell housing to tail shaft with a 6 tail shaft. 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. A problem with your flex plate can be very dangerous. I was just wondering how many of you out there with the 4.
What causes a flexplate to crack twice after two replaced. 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. 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. I just always assumed it was an exhaust leak or loose header. Symptoms of a cracked flexplate general discussion modern. The cracked hub is a little harder, usually experience with cracked flex. I just thought id post a short video of what a cracked flexplate on a 6. A bad flex plate could potentially cause a loss of power to the wheels and result in an accident. 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. 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. There are tough flexplatesand there are chuck norriscaliber flexplates. The flexplate takes the place of the flywheel on automatic transmission vehicles. So for a summary, the 700r4 transmission was a 4geared hydraulic automatic transmission with the 4th gear which was an overdrive gear 30% increase.
Symptoms of a cracked flexplate welcome to modern mopar forum. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. As i was driving into work this morning i noticed a sound that seemed to come from the middle of the car. Cracked flex plate, loose bolt holding the flex plate to the torque converter, spider gears going bad. 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.
Install the first bolt finger tight then use the starter motor to bump each drive lug into position. The flex plate replaces the flywheel in automatic transmission cars. The transmission mount location on the 700r4 is also a. When you experience a symptom of a bad transmission valve body, it is very noticeable.
After their repair, it would set a p0741 tcc stuck off, od light flashing, etc. Symptoms of a bad flex plate on a 2003 dodge grand caravan. Top rated products in automotive replacement flexplates. A cracked flex plate will usually cause a squeaky sound like a belt but shorter and sharper. They weld in a spacer for the 235261 crank and then redrill the correct bolt hole pattern. Not warranty a unit that shows signs of low pressure or fluid level. If not properly diagnosed it will occur again and often damage to the transmission may follow. The flexplate has cracked twice in the past 6 months. How to know if a flexplate is warped it still runs. Aside from a manufacturing defect, the only things that will cause a cracked flex plate are improper torque on the plate bolts at the. Because your flex plate transmits the power from your engine to your transmission, your ability to control your vehicles power can be affected.
A cracked flexplate is almost always a sign of other problems. Torque converter identification catalog tcs products. I have also seen the alignment dowels go missing between the bell housing and the engine block. So, following on from my breakdown the car, then nearly me. I have seen both of these occur every now and then on the caravans. Dude, looking at your questions for the past 2 weeks, you should give up trying to fix your own vehicle. When stripped down, the plate had split around all 6 bolt holes. Most have teeth around the edge for the starter to engage into when starting your car. Any of these three items could cause your vibration.
Descriptions of the sound include clanking, chirping and a light knocking. 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. Raise transmission and install crossmember assembly then tighten all bolts. 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. These do occasionally crack and will need replacing. 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. From what the po told me, the motor is a 350 from a 72 monte carlo. Apr 22, 2018 i just thought id post a short video of what a cracked flexplate on a 6. 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. We specialize in a widevariety of highquality car parts and accessories for your car, truck or suv. Damaged and leaking front seals and front transmission pumps are common symptoms.
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. It bolts to the end of the crankshaft and the transmissions torque converter bolts to it. The job of a flex plate is to allow for expansion of the torque converter as engine rpm increases. Nov 03, 2011 so, following on from my breakdown the car, then nearly me.
Exactly the symptoms of my failing flex plate it rattles at idle under no load because the cyclic speed variation of the engine is greatest the accel decel becomes less significant at higher speeds. 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. Atp automotive z270 automatic transmission flywheel flexplate. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing, during the. We offer high quality new, oem, aftermarket and remanufactured chevrolet s10 flex plate parts. The recommended transmission fluid is dextron vi with a capacity of. The first cracked fp for me i ignorantly assumed the missing torque converter bolt was the problem so i missed the bellhousing problem. Bad torque converter vs bad transmission drivetrain resource.
Being an auto, it will be fluid balanced by the torque convertor, so babancing it wont be an issue. 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. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. 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. I investigated it and it sounded like it was coming from the. Mine was cracked all the way around the center mounting holes shop the new one is like. 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. Youll be able to customize your profile, receive reputation points as a reward for. Oct 19, 2008 sounds just like when the flex plate on my 200 tdi auto was buggered.
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