At the risk of being told to do a search....
I don't think I can read another thread about gear oil. So much conflicting information.
I've got a 915 with LSD. 100% track use. I'm located in NZ and as such only have access to Motul and Brad Penn.
Use Brad Penn for the engine. Thinking I'll use Brad Penn for the gearbox?
https://penngrade1.com/products/gear-lubricants/
Thinking 80w90 without the LSD additive? Does that sound right to you guys?