Question about 1999 Isuzu Rodeo

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Flexplate keeps brakeing this is the 3rd one just replaced the motor right before this preob what is wrong with it

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You're going to have to check 3 things specifically:

1. If the crankshaft is bent a slight amount, then each revolution of the crankshaft is causing more than the prescribed amount of flex that was intended, then much like a coathanger, eventually when constantly over bent-breakage occurs. A crankshaft can have a minor bend in it without causing the engine not to work. A leaking front or rear main seal can be a good indicator of a crank problem.

2. The other way that this happens is if the crank is straight & when hooked to the torque converter, the torque converter is cocked to one side or another, worn pilot bearing or bushings, or the mounting bolts/surfaces are uneven for whatever reason..

3. The only other thing that I can suggest is that you make sure your mounting pins keep the bellhousing & engine perfectly aligned when assembling them as any lateral movement or a gap between the two would also put a twist to the flex plate resulting in failure.

I've always tried to take the time with the trans out to check the flex plate on the engine by measuring & rotating, same when it comes time to align & assemble, I always rotate the engine as I'm connecting the trans in order to make sure that everything is working smoothly, and after all of the bolts are in, I like to make several revolutions to check for any binding or restriction. I hope that this sheds some light possible reasons for the breakage, good luck

Posted on Jan 31, 2010

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