What rear end in an '02 Duramax?

[pismorat]

I am looking to change the differential fluid in my dads truck, but need to know what rear end is in it to get a gasket. I don't want to go to the dealer, and my dad doesn't like using just rtv. Any thoughts - 14bff???

 

[sweetk30]

if the cover kind of looks like 14ff cover its the new 11.5 corp axle. if just exactly like 14ff then old std 14ff. most likly 11.5 new axle.

 

[daleearnhardt01]

11.5" Full Floater 14 Bolt....

 

[steve_kibbe]

I thought they were a AAM axle??

You can buy a sheet of gasket paper and cut one out. Clean your dif cover, mark the out side edge and the holes, then cut out the outline. Next, cut a hole in the middle where the ring gear can come through. Place it over the lip of the dif housing where the gasket will go. Take a round piece of metal and score the inside edge against the inner lip of the housing. Cut the scored mark out, use a hole punch for the bolt holes, and whala, you have a gasket.

Before you install it, make a template so you don't have to go through all this again.

Or you can just buy one

 

[daleearnhardt01]

I thought they were a AAM axle??

It is made by AAM

 

[JIM88K5]

Do it right

11.50 ring gear. Go to the dealer get the part and be done with it. It takes synthetic gear lube too you know...