RP gear oil and limited slip additive

[Wolfpack]

I am getting ready to change the rear diff fluid in my truck. I want to use Royal Purple but I am not sure if I can use the trans X LSD additive. Does anyone know if this will negatively effect the oil? Many thanks!

 

[dparm]

Do you have an LSD? Does the RP already have the LSD additive in it? Many gear oils do.

 

[aquariuscsm]

RP gave me rear wheel hop. Maybe their lsd add isn`t strong enough?

 

[Wolfpack]

I have an LSD, and I have read that the gear oils with the additive in them already end up making the Toyota LSD chatter, and cause people to have to add a bottle of LSD additive. I have the bottle I was just curious as to the effect on the oil, I would not think it would hurt it bad, but there are many people here that have alot more knowledge than I on this subject. Thanks for the quick replies!

 

[Wolfpack]

Well I took the plunge and changed it with the additive. I have put several hundred miles on it so far with no ill behavior. I use three qts of RP 75-90 (the truck calls for 80-90 but...) and I added in a partial tube of Tran X LSD additive. I will report back any findings if I get anything out of the ordinary. Thanks again for the replies!

 

[Ken2]

My Toyota LSD runs fine with just the additive already in the gear oil (nor RP). After the oil change I ran the truck very slowly in tight figure-eights to work the new oil into the clutches. I bought the extra additive and never used it...no chatter from the rear so no need for the additive.

 

[MetalSlug]

I alway add a LSD bottle to any synthetic that already say it have lsd stuff in, add it anyway.

 

[Bror Jace]

It seems every application is a bit different than every other. Regardless what oil you choose, I would be prepared to use a LSD (Limited Slip Differential) additive.

If any gear oil says NOT to use a LSD additive because of possible compatibility issues, I would pick another brand of gear oil.