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Is it possible to make a non-posi carrier into a posi carrier? What is a posi clutch pack? Is this what it takes to do this?

This is for a ford 8 inch non-posi third member.

If so I imagine that this can also be done for a 9 inch carrier as well.
 

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In the old days we used to shim the spiders tight in a 9" and it would perform as a posi for a while. But, in reality the carrier has to be made for the clutch pack that fits inside. This pack provides the friction to turn both wheels. A non-posi carrier is different from a posi. There is a gentleman in Ohio that specializes in 8" Ford posi units. Maybe someone here can post his name/business as I can't remember it at this time (Geezeritis).
 

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8" Trac-Lok

Ford calls their units Trac-Lok (short for Traction Lok), Posi is the inferior. Both 9" and 8" are Trac-Loks. The rears were available in 2 & 4 pinion "open" diffs (non Trac Lok) and Trac-loks.

Both have some parts than interchange. 8" Trac-loks are hard to find, there were alot more 9" T-Ls made. You can shim the side gears in an open rear to tighten it up and have it act more like a locker.

Henry
 
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