posi unit or limited slip????

is there any other year of posi units or limited slip that will fit a 10 bolt rear end, for a 1972 buick gs?

 

There are TONS of Limited slip Units for the 8.5.
Posi term is a NICKNAME Your calling out the same thing in your statement. Posi is limited slip and vise versa.
Oldsmobile is anti spin
Pontiac calls thiers safty track
AMC twin grip
Ford track lock
Mopar Sure grip etc....
So back to the 8.5
You have Eaton (clutches), Auburn (cones), True Trac (worm Gears), Yukon Dura grip (eaton style)
Lockers mechanical Power trax, Detroit Locker, Grizzly locker They are more aggressive in lock-up and can cause noise in turns to release axle torsion twist .

If you have bolt in axles you can use FULL SPOOL for Maximum traction to both wheel and normall drag race or dirt track racing.
There is also a super low cost mini spool designed for dirt track low buck boys and girls...
Finally you have last hope Lincoln locker...WELD the spiders in a open diff. ...LOL Not recommend here.

Jim
JD Race

 

Thin the term "posi" was a Chevy term and became a generic name like IBM cards.

 

So what is a peg leg traction rear end called

 

Junk. Lol

 

So to answer your question, yes.

The 8.5 found in your car was manufactured through 1996, maybe longer. If you want to go junkyard crawling to find a new(used) differential, you'll want to stick with units probably 1989 and below, because I believe 1990 and up units were 30 spline, and wont fit your 28 spline axles. These units can be found on ebay for reasonable prices too every once in a while. Be mindful of carrier break part numbers if you want to use your original ring and pinion. You ight also want to consider a bran new unit - Monzas who has responded earlier or Everyday Performance can probably provide a new Dura Grip style unit for very reasonable money too....

 

Trutrac has no clutches to wear out, no ratchet to jerk and pop, and eliminates the weak spider gears. Smooth and very strong.

 

Sorry EVERYTHING WEARS....lol. The worm gears DO wear. And the hole wear.
That is like saying the ring and pinion do not wear...

 

you mean open junk lmao

 

Open differential or STANDARD differential.
Posi traction was BUICK and Chevy depended on whether you had one word or hyphenated 2 word.
Anti spin olds
twin grip AMC
Trac loc Ford
Safety track Pontiac
Sure grip Mopar
Power Lock DANA CORP
Knick names all over the place
PROPER TERM IS : LIMITED SLIP DIFFERENTIAL. (LSD) is what the youngins call it today

 

I like it when people say “I have Positraction, NOT limited slip”

 

BAck in the day you could know what the guy was driving when you over heard those terms...lol.

 

CAN NOT tell you how many calls i get when people say that...DRIVES me crazy...lol.

 

A local yard calls them a slip-posi

 

I learned all about this from My Cousin Vinny.

 

LOLOLOL

 

This is a posi burnout!!! It signifies that this is a place to do burnouts. Not one tire fires! It also does not mean the road is slippery!