Rear end question

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SBCregal

Master Mechanic
Jan 22, 2006
261
1
0
Hey all,

I'm looking to put a posi in my car, but I don't know what exactly to look for. What other cars would i be able to pull one out of that will fit. I have 2.73 open diff right now. I don't know if the axles are 26 or 28 spline (possibly something else?) by the way, the car is a 87 regal

Thanks

Ryan
 

betsy84

Greasemonkey
Nov 27, 2005
140
0
0
Toronto, Ontario, Canada
Your looking at a 26 spline unless modified, other 26 splines that I know of that will fit it from the 80s are/ s10, blazer, SOME 80s Fbodys, monte's, regals, el caminos, malibus, 442s and H/Os. Look for RPO code G80. Thats POSI. Most will probably be a 2 series carrier which you can put a spacer and get numerically higher 3.08, otherwise the 2 series carrier holds 3.08 and numerically lower.
 
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