tracar91

iTrader: (1)

I realized as I was driving home from a recent car show (first time I've driven the car since September) that I have developed a significant driveline vibration in the camaro. Here is some background:

1991 Z28
LS1
T56
Stock driveshaft
Stock Rearend

Vibration happens only when on the gas (most noticable cruising at highway speeds). Take foot of the gas and the vibration goes away.

All I can think of is that I converted the T56 from a LT1 style to a LS1 style when converting to the LS1 motor. It didn't have this problem right after completing the swap, but I'm sure it's probably developed over time (I don't drive the car much).

I can't rule out anything yet, but It's unlikely to be the driveshaft or rearend since those are about the only thing left in the car that are stock and original.

Suggestions?

scooter383

i would check u joints ,pinion nut on rear end yoke and tail shaft bushing.there is something loose.

tracar91

iTrader: (1)

Thanks, I'll check that tonight.

billyflantos

iTrader: (6)

+1 on that

weaksauce

just for giggles, check all your lug nuts too.

Old Geezer

iTrader: (3)

How far into the trans is the ft yoke, with the suspension loaded??
The back of the LS block is shorter than the old block.. This could move the trans forward, and cause insufficient engagement..