Posted By: EV2CUDA
synthetic gear oil need modifier? - 05/25/10 03:59 AM
Do I need to add the limited slip modifier to the rear diff if I use synthetic gear lube?
synthetic gear oil need modifier?
Posted By: Todd
Re: synthetic gear oil need modifier? - 05/25/10 04:04 AM
Only if the diff has clutches in it. 
Posted By: Crizila
Re: synthetic gear oil need modifier? - 05/25/10 04:08 AM
Try it without it first. If it doesn't chatter, you don't need it.
Posted By: DennisH
Re: synthetic gear oil need modifier? - 05/25/10 11:48 AM
Quote:
Try it without it first. If it doesn't chatter, you don't need it.
Yep. Amsoil in the Dana 60. No need for the additive.
Posted By: torkrules
Re: synthetic gear oil need modifier? - 05/26/10 02:42 AM
Quote:
Do I need to add the limited slip modifier to the rear diff if I use synthetic gear lube?
Royal Purple does not need the additive
Posted By: ahy
Re: synthetic gear oil need modifier? - 05/26/10 05:17 AM
I had a Jeep with limited slip diffs. On a road trip, I had the dealer change the oil due to contamination with the recommended synthetic lube They forgot to add the modifier. A couple of hundred miles into the trip home it started chattering and grabbing terribly on any kind of turn. I stopped and got some modifier at an auto parts store, put it in and a few miles later all was well again.
Based on that I would say yes, add the modifier.
Based on that I would say yes, add the modifier.