when I do a burn-out both tires spin and I was wondering if I have a posi-rear end. Do non posi-rear ends ever spin both tires or do they only do a one wheel peel??

thanks

87 firebird formula
VIN--1G2FS21H7HL212168
305 LG4

 

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-

 

open diffs will occasionally spin both rear tires. need more info on the car to know if it has a posi in it. or you can check for the rpo g80.

 

IF you jack the back off the ground on both sides you can tell, if you turn one tire forward and the other one turns in the same direction you have a posi..if you do this and the other one turns in the opposite direction you don't..

 

only way to be 100% sure is to pull the cover and look. it sounds like you have posi, if you also had the g80 rpo then i'd say you do. wouldn't hurt to pull cover to look around anyway, change the lube and add a bottle of posi additive.

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ICON Motorsports

1st & 3rd
MM Black Diamond 538 F&AM

 

thanks you guys that helps a lot.