Those factors ensure that when the engine starts and the driver puts it in. 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 custom converter builder made up a torque converter for me that had the six bolt hook up to the flex plate. Aside from a manufacturing defect, the only things that will cause a cracked flex plate are improper torque on the plate bolts at the. 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. Because the flex plate is an integral part of your cars powertrain, and replacing it involves removing the transmission, a.
Symptoms of a cracked flexplate general discussion. The cracked hub is a little harder, usually experience with cracked flex. 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. Lsseries engine to chevy th350700r42004r flexplate kit. The 2001 toyota rav4 has 1 problems reported for cracked flex platetorque converter. Rattles at idle but the force of driving jams the bits together so no rattle when driving. The constant expansion and contraction of a flex plate over time can result cracks andor shearing of the flex plate. It bolts to the end of the crankshaft and the transmissions torque converter bolts to it. Gm chevy torque converter flexplate cover turbo 200. From what the po told me, the motor is a 350 from a 72 monte carlo.
Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. When retrofitting the 2012 chevy camaro zl1 for racing with an automatic transmission, the tci gm lsa flexplate is a must. 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. Nov 28, 2016 local trans shop did a 700r4 swap a little over a year ago. Nov 23, 2015 the other task the flexplate must perform is joining the crankshaft to the torque converter. The first indication was the it was hitting the starter teeth. The other task the flexplate must perform is joining the crankshaft to the torque converter. You really should check the end play on the crank using a dial indicator should measure 0. Flexplate, heavyduty, 168tooth, steel, external balance, 1piece rear main seal, chevy, nonsfi, each. Weve got tough yet affordable flexplates for stock and mildly modified street vehicles. After checking the flexplate id pull the valve covers to see if theres damage up top that is preventing the engine from turnung over. 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.
Jeep auto trans flexplate auto trans flexplate for. Furthermore, if not properly diagnosed it will occur again and often damage to the transmission may follow. We offer high quality new, oem, aftermarket and remanufactured chevrolet s10 flex plate parts. We dont trust what the po did, as some bolts were loose, some were stupid tight on the flexplate. Chevrolet s10 flex plate flywheel plate atp pioneer. A flexplate bolts directly to the crankshaft flange, and connects to the.
Ls crankshaft th350th400700r4 torque converter adapter sleeve. There are no cracks in the flex plate and no weights. Flywheel and flexplate dust covers 700r4 transmission type. Perfect fit this adapter does exactly what it says. Install the first bolt finger tight then use the starter motor to bump each drive lug into position. If these issues are overlooked or ignored, your jeep may end up with transmission problems. Some aftermarket flexplates are drilled with both patterns to accept large and small. The same things that cause the flexplate to crack can also cause transmission problems. I just thought id post a short video of what a cracked flexplate on a 6. Any of these three items could cause your vibration. My 33 has 700r4 with original cast cover, gm mini starter and 168 tooth large flexplate. I investigated it and it sounded like it was coming from the.
Flexplates serve a very important function in vehicles equipped with an automatic transmission. I was just wondering how many of you out there with the 4. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing, during the. Technical chevy torque converter flex plate crank vibration. 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. Im assuming this is for your 67 and you have the borgwarner automatic. 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. May 26, 2015 a dropped bolt will definitely make noise but the noise typically doesnt last long since something breaks. Raise transmission and install crossmember assembly then tighten all bolts.
The flexplate has cracked twice in the past 6 months. The problem turned out to be a cracked flex plate which. Rated 5 out of 5 by skidaddy from tci flexplate i bought this as a replacement upgrade for a o. Can i replace the flex plate by unbolting the transmission and sliding it back or do i need to pull it completely out. I replaced the flex plate because the starter had chewed a bald spot in the starter gear. Local trans shop did a 700r4 swap a little over a year ago. Since the flexplate or flywheel delivers rotation power to the transmission, when the flexplate or flywheel cracks, its often indicative of other issues. The rotating assembly with flexplateconverter may be thrusting forward. Cracked flexplates will cause bad vibrations, break dowel pins and cause numerous amount of.
Hand turning it over i found that the new flex plate is not running true. A dropped bolt will definitely make noise but the noise typically doesnt last long since something breaks. Oct 19, 2008 evening folks, my 300tdi auto today developed a nasty intermittant knocking, that seems to be coming from the bellhousing area. Cracked flex plate toyota 4runner forum largest 4runner forum. Then whom ever replaced the fp before me didnt catch the peened bellhousing and tightened it down causing a alignment problem. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. Apr 22, 2018 i just thought id post a short video of what a cracked flexplate on a 6. I put in a new flexplate stock 400 couldnt snag an sfi quick.
They weld in a spacer for the 235261 crank and then redrill the correct bolt hole pattern. Over that past year i have been chasing down a vibration above 50 mph. Descriptions of the sound include clanking, chirping and a light knocking. 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. 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 job of a flex plate is to allow for expansion of the torque converter as engine rpm increases. 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. Cracked flex plate my runner has been making a ticking noise when warmed up for the last 20k miles. The first cracked fp for me i ignorantly assumed the missing torque converter bolt was the problem so i missed the bellhousing problem. If your motor came with a bent or broken flex plate or you just want something new, speedway motors carries.
Buy prw 1835001 sfirated internal balance 168 teeth chromoly steel flexplate for chevy 195785, 90 early, v6, gold irridate. A 153 tooth flexplate will be paired with a torque converter that has a 10 34inch bolt circle. Patc sells billet flexplates, performance flexplates, dodge ford. Last week i was changing motortrans mounts to poly. Mine was cracked all the way around the center mounting holes shop the new. When i upgraded my th400 to the 700r4 had to buy a new flex plate. Nov 20, 2009 my 33 has 700r4 with original cast cover, gm mini starter and 168 tooth large flexplate. 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. Gm chevy torque converter flexplate cover turbo 2004r.
Sounds just like when the flex plate on my 200 tdi auto was buggered. Installation instructions th700r4 4l60 transmission. There should be 2 dowels, one on each side, to align the bellhousing of the transmission with the engine block. Chevy 168tooth plates have dual bolt patterns to accommodate both powerglide and turbohydramatic th torque converters. 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. We called summit racing equipment on the phone and ordered a new heavy duty flexplate and a. Symptoms of a cracked flexplate general discussion modern. 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. Flexplate technology and choosing the flexplate for you. A 168 tooth flexplate uses a 11 12inch bolt circle. A cracked flex plate is almost always a sign of other problems. The road oiler gets overdrive 700r4 swap steelsoldiers. Flywheel and flexplate dust covers 700r4 transmission.
There are tough flexplatesand there are chuck norriscaliber flexplates. The reason for the sound involves the flexplate s location and its function. Being an auto, it will be fluid balanced by the torque convertor, so babancing it wont be an issue. I just always assumed it was an exhaust leak or loose header. The flex plate could also have cracked at the crankshaft hub.
Worn, cracked or broken transmission andor engine mounts should be replaced. Patc sells billet flexplates, performance flexplates. Along the road i had the starter fail to engage and grind a couple times. The key to choosing the correct bolt pattern and tooth count is measuring the torque converter you are using. Engineered to prevent runout, ring gear bounce and other damaging problems, these flexplates offer unmatched strength and protection. Search our online flex plate catalog and find the lowest priced discount auto parts on the web. I have also seen the alignment dowels go missing between the bell housing and the engine block. 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.
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. 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 specialize in a widevariety of highquality car parts and accessories for your car, truck or suv. Gm turbo 350 400 black flexplate flywheel cover gm th350 th400 dust shield 700r4. You can drop the flywheel cover and inspect for missing weights on either convertor or flex plate. Vehicleengine search vehicleengine search makemodel search. Someone drilled 3 holes inboard of the 6 to mount the converter, they are so close to the outer holes they intersect. And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. 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.165 1116 1462 578 509 283 430 1127 276 229 1503 784 964 993 708 343 1405 1412 455 1612 431 1058 1376 1386 110 536 1283 890 438 164 269 607 1372 393 464 160 1384