4l80e swap vibration....

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Oct 6, 2015 | 07:28 PM

#21

JDMC5

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From: Highland, MI

I have the exact same problem.

Oct 8, 2015 | 02:44 AM

#22

Vetal

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From: Latvia

Still haven't solved it... Can't make degree between gearbox and rear end less than 2* - both gearbox rear and torque arm front raised to the max

Oct 3, 2016 | 06:06 PM

#23

Vetal

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From: Latvia

A have some updates here, but still not solved the problem.
I have my driveshaft shortened and bushings in the transmission replaced - still vibration remains.
Today I've measured DS runout near the rear end - about .016", and I also checked how much can I moved DS by hand near the tranny tail, and it moves about .03" vertically. Does this seem normal?

Jul 4, 2018 | 11:27 AM

#24

Cole Train

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From: MN

how are your motor mounts? bad mounts can cause the driveline angles to be out of whack when under load. Mine are shot, like flopping in the clamshells shot...

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