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View Full Version : is it a true posi


hilton27
10-05-2004, 08:54 PM
i have a 87 gn .does it have a true posi(locker or spool) or is it a limited slip. it vibrates when turning hard(pulling into driveway or onto another road)

Keller
10-06-2004, 05:36 PM
Unless someone modified your car from the way it came, it will not have a Detroit Locker or spool. Check the trunk RPO sticker to see if code G80 is present to see if it even has a positraction (limited slip) rear end.

If so, and if it is behaving the way you describe ("clutch chatter" from the posi), it may need the posi clutches replaced. Not unusual for a car of this age and presumed mileage...and hard driving. Not too dificult to do and not too expensive to have done. Parts are available from GM.

If you have a spool installed, your car will lean severely in turns. Lockers will make pronounced noises as they engage and disengage.