What Rear End?

[Mikes91]

How can I tell what rear end my '91 has? See sig for details.

Trying to figure out what disc brake would be correct for my particular application.


Thank you,
Mike

 

[OkieGringo]

Look on the drivers door for the axle code. Then go to this site.

http://www.drivetrain.com/Fordtrkratio_posidata.html

 

[argve]

My guess would be that you have the Sterling 10.25 with the 4.10 limited slip as this was the most common on this era truck with a dually. if you were to pull the rear axle out is there a gasket or an oring that does the sealing? Reason I ask this is because the Dana has a gasket and the Sterling has an o-ring. If I remember correctly from my factory service manual that the only way you could get a Dana Dually axle was to have the superduty verison of the truck if it was a standard duty then you hav the sterling but don't quote me on that - I'm pulling that from memory....

 

[Agnem]

You wouldn't have to pull the axle to see the gasket if you know what your looking at. I'm with Travis. Your going to have a Ford 10.25 with a 4.10. Don't bet on the limited slip though.

 

[clorine12]

to find the gears you can also put a mark on your drive shaft and the ration that drive shaft turns compared to you wheel. For a 4.10 it would be 4 times plus a little

 

[argve]

Easy way to tell if you have limited slip....

Jack up rear of truck and put in neutral - spin one of the wheels by hand if both sides rotate the same way - Limited Slip or locker - if the other side spins the other way then you got a peg leg kicker (standard or open diff)....