I’ve just replaced the central bearing and all U-joints on my 86 SIII V12 driveshaft, plus the transmission rear mount that was shot, in the hopes to eliminate a faint vibration at 60 km/h and a clunking noise uppon hard acceleration…
Everything is back but the vibration is still there…
As everything is now new, and great care was taken to mark everything, I am suspecting that the problem is the central bearing alignment.
I searched around but didn’t find a conclusive answer, some say to the Left, some to the Right some say make sure the driveshaft is straight using plumb lines or a big straight ruler…
The Haynes manual calls for the special jig but can’t find any dimensions for it and from what I’ve red it only applies for SI and SII cars…?
The Salisbury Diff input is offset towards the Right side of the car.
When I dismantled the driveshaft the central bearing was set almost all the way to the Left, the front part was parallel to the car and the rear part was in an angle.
Even if I set the bearing all the way to the Right the driveshaft is still not straight.
As I don’t have a lift, trail and error is quite difficult.
Any advise ?
Thank you and Season’s greetings to all !