The guy at Orielly`s tells me there is two different size 14 bolt AAM axles listed for my truck, one is a 10.5 ring gear and the other a 11.5 ring gear. I`m guessing it is 11.5 but not certain?

I`m getting ready to change the rear end grease, and looking for a new cover gasket..... He tells me both of the cover gaskets for AAM axles are $50.00 + !!  I am tempted to try the old fashioned silicone route. Any thoughts?

 

Just did some homework and I have an 11.5 ring gear. The darn gasket is $57 bucks.. WTF?  Is it supposed to be reusable or what?

The one for my old GMC 14 bolt is $5 bucks

57 bucks for a gasket.... wow

 

They have sheets of gasket marker paper with like $5-$10 

I'm Not positive on the dodge AAM but my duramax had a drain plug on the bottom. Maybe worth a look. 

The gasket is reusable so don't bother buying one. 

From 2004 on all diesel trucks have the 11.5. 2003 can be tricky, but all HO's have the 11.5 and some SO/Cali's have the 10.5 with the 47RE trans. 

I never used gaskets on rear or front ends always used review gray or black, never had problems.

7 hours ago, AH64ID said:

The gasket is reusable so don't bother buying one. 

From 2004 on all diesel trucks have the 11.5. 2003 can be tricky, but all HO's have the 11.5 and some SO/Cali's have the 10.5 with the 47RE trans. 

I thought there must be something special about that gasket to $$$ so much.   The 11.5 holds almost a gallon of gear oil as well 

Put a MH cover on it.... Mine holds 8 quarts. 

11 minutes ago, AH64ID said:

Put a MH cover on it.... Mine holds 8 quarts. 

If I towed as much as some of you guys I might look into it.. Man that's a lot of gear oil !

The AAM diff cover gasket is similar to the auto tranny pan gaskets, metal with silicone type sealing surface totally reusable forever unless it gets damaged.

Edited February 21, 20169 yr by Wild and Free