Does LSD diff need an additive?

[Nicad]

Planning on buying a synthetic diff oil approved for a Limited Slip unit. Does it still need an additive in it typically?

 

[TodB]

on my latest e28 5 years ago, the LSD creaked. I added the GM additive to the fresh redline diff fluid, all 2 Ozs of it, and it has not creaked since.

 

[andyleonard]

Put Redline in the Land Cruiser and 200 miles later it started cracking. Added 2 bottles of GM lube and all good 5K later.

 

[Nicad]

Thanks for the info.

 

[DerSchwede]

Planning on buying a synthetic diff oil approved for a Limited Slip unit. Does it still need an additive in it typically?

Buy the Castrol SAF-XJ. That works fine w/o any additive. They call it Castrol Limited Slip nowadays.