700r4 cracked flex plate

Patc sells billet flexplates, performance flexplates, dodge ford. Engineered to prevent runout, ring gear bounce and other damaging problems, these flexplates offer unmatched strength and protection. We dont trust what the po did, as some bolts were loose, some were stupid tight on the flexplate. The flex plate could also have cracked at the crankshaft hub. The first indication was the it was hitting the starter teeth. Worn, cracked or broken transmission andor engine mounts should be replaced. The other task the flexplate must perform is joining the crankshaft to the torque converter. Technical chevy torque converter flex plate crank vibration. The rotating assembly with flexplateconverter may be thrusting forward.

Gm chevy torque converter flexplate cover turbo 2004r. The reason for the sound involves the flexplate s location and its function. The constant expansion and contraction of a flex plate over time can result cracks andor shearing of the flex plate. Mar 07, 2017 the flex plate has 6 converter holes in a larger bolt circle than the 3 the converter is using it also has 6 lugs. May 26, 2015 a dropped bolt will definitely make noise but the noise typically doesnt last long since something breaks. There are tough flexplatesand there are chuck norriscaliber flexplates. Can i replace the flex plate by unbolting the transmission and sliding it back or do i need to pull it completely out. Some aftermarket flexplates are drilled with both patterns to accept large and small. Im assuming this is for your 67 and you have the borgwarner automatic. Rated 5 out of 5 by skidaddy from tci flexplate i bought this as a replacement upgrade for a o. The problem turned out to be a cracked flex plate which. When i upgraded my th400 to the 700r4 had to buy a new flex plate. Because the flex plate is an integral part of your cars powertrain, and replacing it involves removing the transmission, a.

Along the road i had the starter fail to engage and grind a couple times. A 153 tooth flexplate will be paired with a torque converter that has a 10 34inch bolt circle. Nov 28, 2016 local trans shop did a 700r4 swap a little over a year ago. 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. I put in a new flexplate stock 400 couldnt snag an sfi quick. The road oiler gets overdrive 700r4 swap steelsoldiers. Apr 22, 2018 i just thought id post a short video of what a cracked flexplate on a 6. Perfect fit this adapter does exactly what it says. A flexplate bolts directly to the crankshaft flange, and connects to the.

Flexplate technology and choosing the flexplate for you. I was just wondering how many of you out there with the 4. 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. Then whom ever replaced the fp before me didnt catch the peened bellhousing and tightened it down causing a alignment problem. The same things that cause the flexplate to crack can also cause transmission problems. Sounds just like when the flex plate on my 200 tdi auto was buggered. Weve got tough yet affordable flexplates for stock and mildly modified street vehicles. Since the flexplate or flywheel delivers rotation power to the transmission, when the flexplate or flywheel cracks, its often indicative of other issues. 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. Cracked flexplates will cause bad vibrations, break dowel pins and cause numerous amount of. A dropped bolt will definitely make noise but the noise typically doesnt last long since something breaks. Just make sure your flexplate matches the type of engine you have one piece rear main vs 2 piece rear main the one piece will have a balance weight welded to it. You really should check the end play on the crank using a dial indicator should measure 0. Raise transmission and install crossmember assembly then tighten all bolts.

Atp automotive z270 automatic transmission flywheel flexplate. Mine was cracked all the way around the center mounting holes shop the new. From what the po told me, the motor is a 350 from a 72 monte carlo. 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. It bolts to the end of the crankshaft and the transmissions torque converter bolts to it. 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.

Being an auto, it will be fluid balanced by the torque convertor, so babancing it wont be an issue. Tci lsa 8bolt flexplate 399756 when retrofitting the 2012 chevy camaro zl1 for racing with an automatic transmission, the tci gm lsa flexplate is a must. A flexplate consists of a steel, circular disk with perforated holes and, depending on the model, teeth on the outside ring which engage the starter. You can drop the flywheel cover and inspect for missing weights on either convertor or flex plate. Cracked flex plate my runner has been making a ticking noise when warmed up for the last 20k miles.

Those factors ensure that when the engine starts and the driver puts it in. The cracked hub is a little harder, usually experience with cracked flex. I dont have 5,000 miles on that new flexplate and i now have a cracked flex plate, trashed tc, and probably need a trans rebuild. Install the first bolt finger tight then use the starter motor to bump each drive lug into position. The key to choosing the correct bolt pattern and tooth count is measuring the torque converter you are using. Buy prw 1835001 sfirated internal balance 168 teeth chromoly steel flexplate for chevy 195785, 90 early, v6, gold irridate. If your motor came with a bent or broken flex plate or you just want something new, speedway motors carries. Nov 20, 2009 my 33 has 700r4 with original cast cover, gm mini starter and 168 tooth large flexplate. If these issues are overlooked or ignored, your jeep may end up with transmission problems. Descriptions of the sound include clanking, chirping and a light knocking. Patc sells billet flexplates, performance flexplates. The job of a flex plate is to allow for expansion of the torque converter as engine rpm increases.

Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. Furthermore, if not properly diagnosed it will occur again and often damage to the transmission may follow. Symptoms of a cracked flexplate general discussion modern. Chevrolet s10 flex plate flywheel plate atp pioneer. Last week i was changing motortrans mounts to poly. How to know if a flexplate is warped it still runs. Vehicleengine search vehicleengine search makemodel search. Chevy 168tooth plates have dual bolt patterns to accommodate both powerglide and turbohydramatic th torque converters. Rattles at idle but the force of driving jams the bits together so no rattle when driving. There should be 2 dowels, one on each side, to align the bellhousing of the transmission with the engine block. I have had a quick look through the starter motor hole and checked that the bolts that hold the torque converter to the flex plate are tight which they are. We called summit racing equipment on the phone and ordered a new heavy duty flexplate and a. Aside from a manufacturing defect, the only things that will cause a cracked flex plate are improper torque on the plate bolts at the. Oct 19, 2008 evening folks, my 300tdi auto today developed a nasty intermittant knocking, that seems to be coming from the bellhousing area.

Ls crankshaft th350th400700r4 torque converter adapter sleeve. When retrofitting the 2012 chevy camaro zl1 for racing with an automatic transmission, the tci gm lsa flexplate is a must. My 33 has 700r4 with original cast cover, gm mini starter and 168 tooth large flexplate. The 2001 toyota rav4 has 1 problems reported for cracked flex platetorque converter.

Jeep auto trans flexplate auto trans flexplate for. Over that past year i have been chasing down a vibration above 50 mph. A 168 tooth flexplate uses a 11 12inch bolt circle. If you really stop and think about a highhorsepower pro modified car planting the tires and launching to a subone second 60foot times, realizing there is a small, relatively thin plate of metal transferring 4,000 horsepower rearward at one of the key junctions in the powertrain, you begin to see the. Cracked flex plate toyota 4runner forum largest 4runner forum. If a bolt has broken or become loose, on the flexplate, these can misalign the flexplate and cause the side of the plate to come into contact with. A cracked flex plate is almost always a sign of other problems. I have also seen the alignment dowels go missing between the bell housing and the engine block.

Flexplates serve a very important function in vehicles equipped with an automatic transmission. Installation instructions th700r4 4l60 transmission. Gm turbo 350 400 black flexplate flywheel cover gm th350 th400 dust shield 700r4. Nov 23, 2015 the other task the flexplate must perform is joining the crankshaft to the torque converter. Lsseries engine to chevy th350700r42004r flexplate kit. They weld in a spacer for the 235261 crank and then redrill the correct bolt hole pattern. The likely cause for the cracked flex plate is likely due to misalignment because of dowel pins that keep the eng and trans from mounting flush together. Someone drilled 3 holes inboard of the 6 to mount the converter, they are so close to the outer holes they intersect. Local trans shop did a 700r4 swap a little over a year ago.

We specialize in a widevariety of highquality car parts and accessories for your car, truck or suv. 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 custom converter builder made up a torque converter for me that had the six bolt hook up to the flex plate. I replaced the flex plate because the starter had chewed a bald spot in the starter gear. Any of these three items could cause your vibration. The cracked hub is a little harder, usually experience with cracked flex plates makes it easier to diagnose that. 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.

Symptoms of a cracked flexplate general discussion. And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. Gm chevy torque converter flexplate cover turbo 200. There are no cracks in the flex plate and no weights. I just always assumed it was an exhaust leak or loose header. I investigated it and it sounded like it was coming from the. We offer high quality new, oem, aftermarket and remanufactured chevrolet s10 flex plate parts.

The flexplate has cracked twice in the past 6 months. Flywheel and flexplate dust covers 700r4 transmission. Flexplate, heavyduty, 168tooth, steel, external balance, 1piece rear main seal, chevy, nonsfi, each. The flex plate replaces the flywheel in automatic transmission cars.

The first cracked fp for me i ignorantly assumed the missing torque converter bolt was the problem so i missed the bellhousing problem. Gm power enthusiasts like us were relieved to find that the gm gen iii engine released in 1997 had essentially the same block bolt pattern at the rear face as the previous chevy. Flywheel and flexplate dust covers 700r4 transmission type. Search our online flex plate catalog and find the lowest priced discount auto parts on the web. I just thought id post a short video of what a cracked flexplate on a 6. Hand turning it over i found that the new flex plate is not running true. After checking the flexplate id pull the valve covers to see if theres damage up top that is preventing the engine from turnung over. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing, during the. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. 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.