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Author Topic:   Broken Drive Train
Robert Carson
unregistered Total posts: 620
posted October 15, 2002 01:35 PM
Trying to figure out what happened: Limited Late Model, stock front clip actually full frame car, multi-leaf, solid engine mounts, engine-to-tranny mid-plate, T350, rear tranny brace (brace is constructed out of square tubing with 2 rubber “doughnuts” that the tranny rests on), stock drive shaft, 9” rear end. Been running this set-up for 1.5 seasons. Have cracked bell housing twice now. 1st time thought it was fluke (my mistake for assuming maybe uh?).

Last weekend was last points race of season. 1st time out since recently rebuilding tranny (new pump & planetary). Started on pole in heat race, race went green, made it to flag stand when loud “CRACK/POP” & I coasted to stop all the way around track to pit exit.

Results: bell housing cracked totally in 2 from driver to passenger side, drive shaft twisted in two, pinion gear snapped in two behind yoke, went from finishing season 6th in points to 7th.

Any ideas as to where to start looking?

Dirt Maniac

Total posts: 122
posted October 15, 2002 04:58 PM
Sounds like your tranny locked up inside and broke everything it was attached to.
Take a real close look at the guts of that tranny and you could find the culprit.
I broke a bell housing like that once but that was from a miss-aligned tork converter which caused an un-balanced rotating mass which caused a terrible mess, couplers all the way now!.

Robert Carson
unregistered Total posts: 122
posted October 16, 2002 10:41 AM
Thanks for the reply. As for checking the tranny out, it's going to my tranny sponsor tomorrow to be gone through. Bad thing is, I had just put it back in the previous week after having them fix the pump & planetary. So it had about 1/2 mile on it when everything broke.

Shop that does the 9" suspects the driveshaft broke and started the chain reaction

Take care

Dirt Full Roller

Total posts: 62
posted October 17, 2002 12:05 AM
The driveshaft breaking could be a possibility, I dont know why, but from what i have heard is when the drive shaft goes depending on the load that is on the motor it zings it so hard that things just come apart. I broke a driveshaft in my drag car one nite, broke the pinion, and literally exploded the tranny luckily I had a tranny blanket on the car otherwise i could have lost a foot, or at least a few toes!! just my 2cents

Robert Carson
unregistered Total posts: 62
posted October 17, 2002 04:25 PM
JMillerJr76, met w/tranny sponsor this am. He too is thinking driveshaft (but is going to check tranny thoroughly). Don't know that I'll ever kow for sure what caused the problems and that's what has me nervous.

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