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1991 740 Turbo Wagon - bucking/vibration under breaking...driveshaft? 700 1991

uid 13809's pic
posted by  Alex Z on  Fri Apr 9 21:40 CST 2004
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last visit: Thu Oct 3 04:30 CST 2013
[RELATED]

Probably warped rear rotors and/or worn transmission mount.

It couldn't hurt to:

- check the rotors (all 4) for runout
- check the front calipers for proper operation (if they're okay, lube for good measure.. if not repair or replace and then lube)
- check the center support bearing for smooth operation
- check the bushings again (yes they're polyurethane, but they're not indestructable..), check the rear strut bushings and the rest of the front bushings.

Altho the 91 should have gotten the biggest (front) rotors Volvo ever placed on a RWD brick, I believe they're still prone to warping. The PO of my wagon went through rotors on a yearly basis.

If you're not feeling the vibration so much in the steering wheel, I'd suspect something's up with the rear rotors.

Don't use cheap rotors. If you're not using Volvo rotors, use a reputable brand (ATE, Zimmerman). Don't resurface your rotors ever.

--
alex

'89 765T, 171,4xx mi






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