trinituner.com

Guys,

Don't have the service manual for my BT-50 4x4 so i need some advice on what type and grade of gearbox oil and diff/transfer case oil to use and how often should it be changed.

Thanks,

This has been beaten to death a million times - do a search - i use redline

Me too,,,,,i end up using Amsoil gear lube 75w90 for both gearbox and diff

or you can use 80w90 np, it workes just fine. I have repaired lots of these and i use this oil