suregrip diff oil

[67belvedere/225]

just putting my suregrip that I ordered from mopar performance in my diff
I made the tool to adjust the screws for the back lash ,
now wondering what oil to run, Castrol 75w90 synthetic and if do I need additive

 

[moparnation74]

I was told by Dr Diff to run the Walmart brand, Supertech....he runs that in everything he owns...and include the hypoid additive..

 

[67belvedere/225]

so basically gear oil and the additif

 

[moparnation74]

Correct....

 

[PurpleBeeper]

Yes, you use "posi" additive which is included with some gear lubes & added separately with other brands of gear lube. AutoZone sells "TransX" (I think) posi additive separately. You can use 75W-90 similar. I use 75W-140 in mine for no good reason other than the "thicker is better" idea (which isn't always right).

 

[mmissile]

I run natural oil, with Ford posi additive....in everything that's not a spool. Natural oil in all, with spools.

 

[67belvedere/225]

thanks , cant wait for spring to lay a patch!

 

[brian6pac]

I use AcDelco 88900330 or 10-4003 same stuff, I was told that any thing that has metal to metal clutches like Dana Powerloc need to use this additive. Most additives are for friction material type clutches.