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I pulled a posi out of I believe a 1996 Caprice/Buick Roadmaster Wagon. I pulled out the 8.5 open diff out of rear axle which came out of a 2 door Chevy Blazer. The bearing on the posi is smaller than the open diff. Obviously the outer race is also smaller. I believe the Blazer axle is actually 8.6.
Is there a bearing race with larger OD that will fit my axle with the smaller bearing?
Is there possible bearing race adapter that will accept the smaller bearing race but will fit my 8.5 housing?
3.0625 changes things, that's a fractional dimension. 3.0575 was neither fractional or metric.
Nothing listed !
Here's the Timken PDF catalog.
ID 1.625 are pages 158-166
3.0625 changes things, that's a fractional dimension. 3.0575 was neither fractional or metric.
Nothing listed !
Here's the Timken PDF catalog.
ID 1.625 are pages 158-166
I updated my original post. I think I have 8.5 posi and 8.6 axle. I think 8.6 carrier will fit 8.5 axle. However, 8.5 carrier will not fit 8.6 axle without special bearing race.
The main difference between the 8.5″ and the 8.6″ is with the carrier bearings.
The factory 8.5″ carrier when installed in a factory 8.5″ axle uses Timken bearing part # LM501349 and race part # LM501314. The inner diameter of the bearing is about 1.625″ and the outer diameter of the race is about 2.890″.
The factory 8.6″ carrier when installed in a factory 8.6″ axle uses Timken bearing part # LM603049 and race part # LM603012. The inner diameter of the bearing is about 1.780″ and the outer diameter of the race is about 3.060″.
OK,went there and read it. End of project,correct ?
I work on the little 10 bolts 7.5/7.625, when in the 28 spline realm, ALL internal parts are interchangeable. I worked on a few 10 bolts of 8.2 and 8.5. I'm aware the 8.6 replaced the 8.5 but was not aware that there are internal differences.
I talked to a local machine shop and they can take LM603012. race, grind the ID and slip fit the smaller race LM501314$50. Otherwise, I need to get whole new limited slip!
11-11-2018, 06:23 PM
Any way to put 8.5 posi in 8.6 Axle ? 
