Differential gear oil change

[DeltaDevil88]

Its time for my differential to be serviced I bought a new chrome cover and fel-pro gasket do I need any sealer or can I just run the gasket bolted down to correct torque spec?

Also I believe the gear oil is 80W-90 each bottle is 1 quart how many do I need? I was guessing 3.

Thanks in advance guys.

 

[CdnCutlass]

I just use a good sealer with no gasket, like permatex copper silicone. You won't need more then 2 quarts of gear oil.

 

[DRIVEN]

Might be a good idea to use some sandpaper to scuff the chrome on the sealing flange. It helps the RTV seal better.

 

[wonderboy24]

well it depends on the gasket,i used rubber gasket and didnt have to use any silicone. yes i would agree use sand paper to scuff things up. 1 1/2 to 2 quarts

 

[DeltaDevil88]

Thanks guys I think I am going with gasket only I hate messing with gooey rtv. Thanks on the 2 quarts don't want to overspend :lol:

I will try the sandpaper method, does it matter what grit? I think I will also wipe the flange down with alcohol.

 

[DRIVEN]

Not really. 80-120# is probably fine. Like I said, it's more to help with RTV sealing. It gives it something to grip to. Chrome is so smooth that sealing fluids can be difficult. The tip/trick holds true with things like chrome thermostat housings and valve covers also.