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4l80e swap vibration....

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Old 10-06-2015, 07:28 PM
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I have the exact same problem.
Old 10-08-2015, 02:44 AM
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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
Old 10-03-2016, 06:06 PM
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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?
Old 07-04-2018, 11:27 AM
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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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