transmissin mount shim question?
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Junior Member
Joined: Feb 2002
Posts: 90
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From: PA
Car: 1986 Iroc
Engine: 305 TPI w/30,000 original miles
Transmission: 700r4 Transgo Shift Kit
transmissin mount shim question?
from what i understand theres a snafu with the poly mounts by energy suspensions concerning different cross members, and whether or not to use the shim. I have an 86 iroc with a 7r4. to shim, or not to shim?
Supreme Member
Joined: Dec 2003
Posts: 2,391
Likes: 1
From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
There have been instances where the shim has caused mysterious vibrations. Typically I leave them out, unless the car has been lowered, and then sometimes you need the shim to correct the tailshaft angle to get the u-joint operating angles into line, as mentioned.
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