Rear diff fluid change?

[Narco]

I've got about 110k on the clock now. Think it would be a good idea to do this? It's a 2004 LT. How do I know if it has a limited slip? Also, do these have actual gaskets or just gasket sealers? Recommendations on the best fluids? How much will it take?

 

[ScottL4619]

Yes, go ahead and change it. You probably don't have a drain plug, so you will have to remove the cover. You can buy a new gasket or use RTV sealer or whatever the stuff is called. Make sure you scrape the old gasket off well. You can check to see if you have a locker by finding the G80 code in the glovebox. I believe that it will take a synthetic 75w-90 either way though...no additive for the G80 if you do have one. It takes just short of 3 qts if I remember correctly. You will either need a bottle with the nozzle or a pump to get it in the fill hole.

 

[Narco]

so even if it has a gasket i can just use sealer? if it has one id prefer to use whats oem to the truck. ive never done this before. my buddy has and will be there helping.

 

[ScottL4619]

It should come factory with a gasket. I just know some people use the sealer when they put it back together...

 

[Narco]

ill go look at the code now...

 

[Vinniety]

I went with amsoil and they actually have a list on there site explaining what fluids are for your truck. Even if you don't use amsoil it's a good reference.

 

[Teqdogg]

I went with amsoil and they actually have a list on there site explaining what fluids are for your truck. Even if you don't use amsoil it's a good reference.

+1 for Amsoil