Tranny Vibration???

[kyleholt11]

I have a turbo 350c tranny the starts to vibrate when i get it up to about 1500 to 2000 rpm in amy gear...How can i fix this problem???

[silicon212]

You may be missing a torque converter bolt, you may have a broken or cracked flexplate, or you may have a weight missing on the torque converter.

That's where I'd center my investigation.

[maxwedge]

How about in neutral?

[kyleholt11]

yes it also vibrates in neutral.

[bobss396]

Deffo something torque convertor related. Also check both motor mounts and the transmission mount while you're down and dirty.

Bob

[kyleholt11]

would a torque converter off of a TH350 work on a TH350c? I know it wont have the lockup capabilities but will it fix the vibration problem?

[maxwedge]

Not the way to do this, plus I think the input shafts are different, some will jump here and confirm this.

[wannablast]

Is this vibration while sitting still or while rolling? I had a problem once with universal joints. They gave me a vibration with different driveline loads and at diffirent speeds until they failed.

[silicon212]

Originally Posted by maxwedge

Not the way to do this, plus I think the input shafts are different, some will jump here and confirm this.

I ran a lockup converter on a non-lockup TH350 for a year before the converter failed. This was in 1998 when I flipped burgers for a living and couldn't afford a proper replacement unit. It can be done, but don't expect longevity out of it.

[bobss396]

Originally Posted by wannablast

Is this vibration while sitting still or while rolling? I had a problem once with universal joints. They gave me a vibration with different driveline loads and at diffirent speeds until they failed.

Bad u-joints usually can be heard before they cause trouble. At low speeds they give off a chirping sound. A visual examination will show signs of rust coming out of the caps, meaning that the grease seal has failed and water is getting in.

Bob

[maxwedge]

Guys according to the OP this thing vibrates in neutral, not the U' joints in that case.

[kyleholt11]

yeah it vibrates in nutural when i rev the engine 2000-3500 RPM...

[silicon212]

Originally Posted by kyleholt11

yeah it vibrates in nutural when i rev the engine 2000-3500 RPM...

My money is still on the torque converter, flex plate, or internal engine balancing. Probably not the latter, if this came on suddenly.

[maxwedge]

Correct, or a bad fan blade on the water pump.

[kyleholt11]

Thanks. My friend gave me a 700R4 yesterday and I was wandering if I am going to switch crossmembers or If I can keep the same one on my truck?