C-4 vibration

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Sep 6, 1999 | 06:16 PM

MSTRAWN

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C-4 vibration

I seem to have a vibration between 1500 and 2500 rpm after the shift into 2nd gear with this C-4 tranny. It is more evident at medium throttle than at light or heavy throttle. Any ideas on this? Any solid ideas would be appreciated.

Sep 7, 1999 | 10:08 AM

deleontow

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Joined: Jun 1999

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From: Banning CA

C-4 vibration

Vibrations can be caused by a number of things, first check all of your ujoints, putting the truck in neutral with the brakes on and tire blocked check for movement in the ujoints, next if they are ok, check the harmonic balancer and make sure it has not spun, next check the tourge converter bolts and make sure they have not come loose.

Let us know what you find.

Dave

Sep 7, 1999 | 04:59 PM

MSTRAWN

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C-4 vibration

How can I tell if the harmonic balancer has spun? I know that the timing marks still line up, if that has anything to do with it. U-joints passed the test.