Flywheel flex plate manual transmission fwd sedan fits 0917 corolla 587049. There are tough flexplatesand there are chuck norriscaliber flexplates. The problem turned out to be a cracked flex plate which. How to know if a flexplate is warped it still runs. In january 2008 the original flywheel cracked and was replaced with a napa flywheel. There also should be a flange on the crank opening which faces the converter see pics. Sorry to dig up an old thread, but i think the flexplate on my th400 is mounted backwards.
My runner has been making a ticking noise when warmed up for the last 20k miles. There are atleast 3 bolt holes on the flex plate these attach the flex plate to the converter. I just always assumed it was an exhaust leak or loose header. Checked inspection plate, no carnage but wasnt able to rotate by hand. Requires balancing plate for use on 383, 400 and 454.
No idea what caused it but this was the noise i was hearing before i fixed it. It sounded like a big end knock at idle, went quiet when put into drive. There should be 2 dowels, one on each side, to align the bellhousing of the transmission with the engine block. Rated 5 out of 5 by skidaddy from tci flexplate i bought this as a replacement upgrade for a o. Stated most likely a cracked flexplate, ive have been searching every place on the web for more information on this, but can only find passing comments. Symptoms of a cracked flexplate general discussion. Gm performance view topic broke my fourth flexplate. I told him the date on the flexplate, and he said, well that plate is 10 years old, so i think that you got your moneys worth, so dont send it back as i wont recert it. When stripped down, the plate had split around all 6 bolt holes.
I have seen a bunch where motor was pulled for said rod knock and broken flex plate was found. Mar 30, 2020 stated most likely a cracked flexplate, ive have been searching every place on the web for more information on this, but can only find passing comments. The other task the flexplate must perform is joining the crankshaft to the torque converter. I dont know if the dowels are still there i will see this weekend. Can you replace chevy flexplate without removing tranny answers.
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 am putting a flexplate on a 400 chevy what way does the weights face towards the motor or towards the transmission. Like loss of power, this symptom could be caused by many factors other than a cracked flexplate. 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. Perhaps someone had the transmission out years ago and failed to torque the flex plate to crank bolts. Im thinking broken flex plate in my 73 blazer however when im in gear low rpm. Descriptions of the sound include clanking, chirping and a light knocking. 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 the flex plate is an integral part of your cars powertrain, and replacing it involves removing the transmission, a.
The first indication was the it was hitting the starter teeth. I dont know how it is cracked i will look this weekend. I had the usaf metal shop make me one from a scrap of aircraft grade stainless. Loose torque converter bolts and cracked flex plates. Toyota car and truck flywheels, flexplates and parts for.
If you have a knocking noise from your engine it might not be the engine itself. I have seen on occasion the torque converter bolts get loose and. 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. Within a week of each other, two different vehicles came into my shop with cracked flex plates. I just thought id post a short video of what a cracked flexplate on a 6. Like bill mentioned, there is a proper torque sequence to follow to tighten the flex plate to the crankshaft.
And like gearcruncher said, the flex plate does have a spacershim and maybe they didnt install it. However, a cracked flexplate has been reported to reduce gas mileage, due to the inefficiency it creates in the engine when it cannot perform as intended. Im replacing it but i was curious what causes it, i have a modular sbc stg3. Sfi approved and heavy duty flexplates hughes performance.
There are tough flexplates and there are chuck norriscaliber flexplates. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. More severe misalignment can break a flexplate in 15,000 to 30,000 miles. Make sure you choose the correct flywheel for your application by reading our tech article. 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 23, 2015 the other task the flexplate must perform is joining the crankshaft to the torque converter.
Weve got tough yet affordable flexplates for stock and mildly modified street vehicles. Whether youre racing or building a street vehicle speedway motors offers several flexplates to choose from for your smallblock chevy engine. A dropped bolt will definitely make noise but the noise typically doesnt last long since something breaks. Symptoms of a cracked flexplate welcome to modern mopar forum. Has anybody had any luck welding up cracks in a 6 cyl flex plate. 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. Atp z166 automatic transmission flywheel flexplate product image. There are four main factors to consider when purchasing a flexplate. Oct 27, 2014 cant pinpoint the source of the noise im thinking either the flexplate or torque converter its a 2000 5. Im in a budget is the flex plate complete with space and bolts. 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. New face for 2021 chevy colorado debuts on hall racing zr2. 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.
This flexplate is designed for use when bolting a gm lsbased motor to a 4l80e and utilizes the 6bolt mounting pattern. Bad starter drive can cause teeth or ring gear to wear rapidly. Unbolt transmission mount or crossmember to allow it to. Because perfect alignment of the engine and transmission are not possible, the flexplate can absorb the minute misalignment. There are a few things to consider before you select a replacement flexplate for your smallblock chevy engine. This may occur in worn engines or engine that have been poorly rebuilt. I purchased a new flex plate for this motor and it came with what appears to be a spacer.
Broken flex plates can not be repaired, they must be replaced. What causes the stock flex plate to break mine cracked the whole way around the crankhaha. The transmission was replaced in 2005 with a remanufactured ford transmission. Performance automatic flexplate stiffener small block ford. I think the shifts are setup too hard on the computer causing the flex plates to break actually. The flexplate has cracked twice in the past 6 months. Check for cross members that would keep you from doing this. Buy atp z166 automatic transmission flywheel flexplate. 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. How to know if a flexplate is warped by chris stevenson. Discussion in the hokey ass message board started by hudsoncustom, jun 19.
I just took it to the garage that replaced it the 1st time to see what they thought about it and they said it was cracked. Jan 27, 2009 is it common for these bolts to loosen up over time ive done a search for a rattling knocking sound from the transmission and it looks like converter or flex plate bolts. Register now to gain access to all of our features. Chevy 168tooth plates have dual bolt patterns to accommodate both powerglide and turbohydramatic th torque converters. Mine was cracked all the way around the center mounting holes shop the new one. Toyota car and truck flywheels, flexplates and parts for sale.
Flexplate technology and choosing the flexplate for you. Apr 11, 2017 any interest in a tci flex plate for the 4l80e. Hand turning it over i found that the new flex plate is not running true. Dec 11, 2017 i show you a nice trick to help you when changing your flex plate of converter. A cracked flex plate is almost always a sign of other problems. Can you replace chevy flexplate without removing tranny. Excessive crankshaft flange runout or end plate can also cause flexplate cracking. Eventually the whole thing would probably have given out, glad i changed it. Atp z166 automatic transmission flywheel flexplate. Or torque convertor nose that engages the pump maybe cracked or broke. Get the best deals on toyota car and truck flywheels, flexplates and parts when you shop the largest online selection. Free shipping on many items browse your favorite brands affordable prices. Any metal shop can make you one using the cracked one as a pattern.
Sfi rated 153 tooth flex plate for internally balanced chevy 350 engines. I put on a ministarter at least 6 years ago and all was working fine until yesterday when i got back home and my 40 chevy wouldnt start just grinds. I put in a new flexplate stock 400 couldnt snag an sfi quick. Notice if the starter has a low, medium or highpitched whine while spinning. Yesterday the flex plate on my 2000 toyota 4runner w 155k miles was replaced. Uncovering an uncommon flex plate issue twice in one week it. Similar in function to a flywheel in manual transmission engines and called a flexplate due to its expansion, or flexing, during the.
And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. Sfi chevy 350 flexplate, 153 tooth, 2piece rear main. Those factors ensure that when the engine starts and the driver puts it in drive, the cracked flexplate s movement will create a noise. What causes a flywheel to crack numerous times justanswer. Find our best fitting flywheel and flex plate bolts for your vehicle and enjoy free next day delivery or same day pickup at a store near you. Get the best deals on toyota car and truck flywheels, flexplates and parts when you shop the largest online selection at. After checking the flexplate id pull the valve covers to see if theres damage up top that is preventing the engine from turnung over. What are the likely causes of failure so maybe i wont do it again. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. The same things that cause the flexplate to crack can also cause transmission problems.
What can cause a cracked flexplate out of balance engine or torque converter. 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. Theres also a chance they didnt gradually torque the bolts that hold the flex plate to the torque converter and maybe its not balanced. Mine cracked all over the place on me, didnt know it until i was doin some instals though and when i removed the starter i seen some of the cracks. Order a performance automatic flexplate stiffener for your small block ford engine mustang from cj pony parts today. Flexplate to crank bolts and pilot hub adapter included. What im looking for is a definitive way to diagnose and repair. A core charge is similar to the deposit you might pay for a can or bottle of soda.
I bought a car with a reactor flexplate on it, and the cert was expired. Evidently my current flexplate came out of a plymouth voyager 3. If you need to replace the flex plate you do not have to remove the trans. Symptoms of a cracked flexplate general discussion modern. Do i have have to remove the tranny or can i just loosen the torque converter and slide it back enough to get to the flex plate. It sounds to me like your torque converter may be on the way out. In many states, to promote recycling, you are charged a deposit when you purchase a can of soda and you receive your deposit back when you return the empty can. It has a few thousand miles since the trans rebuild. If i do need to replace the flexplate, does that involve dropping the trans. Slight misalignment may only cause a single flexplate to break in the life of the vehicle. Installed between the hardware and the flexplate, these steel stiffeners are designed to provide additional strength for the flexplate.
A damaged flex plate can create serious expensive damage. Get the job done with the right part, at the right price. Assault racing products fp350 sfi chevy v8 internal balance 168 tooth sfi flexplate sbc 305 350 bbc 396 427. Speedway has some useful tips to follow that will help speed up the process. Im hoping its a cracked flywheel or a bad lifter but im fearing the worst, connecting rod bearing frustrated because its in such perfect. Flywheel may not be loose but cracked especially between the bolt holes to the crank. Is there any fluid that i need to catch when i remove the inspection plate. The symptom was a ticking sound under certain conditions.
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