O.K. heres my problem, since i bought my 87 camaro a about a year ago i had always wondered if i had posi or not. sometimes when i turn and accelerate i can hear the rear left tire spin, but when i do a burnout i only have the back right tire spinning. so tonight i put the car up on jackstands and spun the rear right wheel to see actually what diff. i had. so i spun the wheel and the other one did nothing! it didnt spin backward like (i think) and open rear would and it didnt spin forward like a posi unit would. But when i went to spin the rear left tire the rear right tire spun backwards about one turn and then stopped spinning even though i was still spinning the other. so what does this mean????????

Any help would be great thanx and sorry to be so long

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keep the stang's far behind u and the cops even farther

 

You have an 87 350? They all came with 9-bolt 3.27 posi rear ends, I think... Sounds like your posi is dead. And 9-bolt posi units are very expensive, if you can find one. You can re-shim it by following the tech article on here.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Thanx for the help. but it origionaly came with a 350 that i threw a rod in so i got the new motor. but to my knowledge i have a 10 bolt

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keep the stang's far behind u and the cops even farther

 

originally came with a 305. sorry

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keep the stang's far behind u and the cops even farther

 

posi rpo is g80, do you have that? i've saw a lot of posi rears with a tag on one of the cover bolts that said to use posi additive, but that only works if no one has taken it off.

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-=ICON MOTORSPORTS=-

 

Ok, you have a 305... Carb or TPI? You'll probably need a new posi unit for 26 splined axles. Jegs sells them for $300 or you can get a new rearend from the junkyard for that much.