8 3/4 gear oil, what kind?

[MOhorsePAR]

Well the 8 3/4, 3.73 Suregrip is all narrow up, completely rebuild ready to install.
What brand & weight of gear oil are you guys running? Are you running an additive for the Suregrip or are does the oil already have it in there?

Thanks,
Steve / MOhorsePAR

 

[Coyote Jack]

I run a spool in the Demon, but in my truck I have a 9.25 sure grip. I run 75w-90 synthitic with the mopar additive. If I don't have the additive, it makes all sorts of weird and wonderfull noise's.

Jack

 

[djwhog]

yes 75-90 or 80-90, if a posi add the additive to it. Fill to just starting to drip out of the hole on level ground.

 

[fishy68]

I'm running Mopar synthetic 75w90. I've noticed some of the synthetic fluids say you don't have to run the friction modifier with them but I've also heard a few guys like Jack say it makes noise without it so I put it in mine to make sure it lives long.

 

[camd64]

GL5 is the spec that they say is for sure grip, limited slip, etc. but i know that the newer mopars do need the extra additive, something about them but not sure what. i run 75-90 gl5 plus a bottle of friction modifier to be safe.