slyfox2062

Hi Guys, just finishing up my 72 Vette and getting ready for registration in Dubai. I'm posting a pic of the differential oil and limited slip additive I'm planning to use. I'm unsure if these are compatible as oil is 100% synthetic, will this be OK???? Appreciate any advice from the lube guys.
Cheers Greg.

MelWff

i would not use the additive with synthetic, you can use the search function and find this topic has come up before

slyfox2062

Thanks for the fast reply, I'll do a search. Regards Greg

fishslayer143

You can buy Synthetics with additive already in it .. I have used 7 oz Trans X Limited slip Additive for decades .. recommended for both Dino and Synthetic.. Put the additive IN FIRST, then fill .. drive around for half hour turning right and left

Eddie 70

It says right on the bottle that it is for Limited Slip. I would not use the additive with it and go with the gear oil only.

zwede

I run synthetic (Mobil1) + the GM additive and it's fine. Years ago I used just a bottle of synthetic gear oil that said it contained limited slip additive and it groaned around corners. Since then I always add a bottle of the additive regardless of what the gear oil bottle says.

3X2

The additive causes the posi plates to slide more freely between themselves which lowers the tightness of the posi and under extreme use causes more heat and wear. I don't use any additives in any diff I do. I use mostly Mobil 1 75-90 Delvac, but have also had good luck with Redline and Royal Purple.