I have a 1993 KV4 with the TY60 5MT. I found this thread which calls out fluid types for the TM transmission variants: https://minitrucktalk.com/threads/transaxle-fill-drain-plugs.2044/ I am wondering what kind of gear oil I need for my TY60. I am comfortable putting 75w90 in it but I need to know: 1. GL-4 or GL-5? 2. Does presence of limited slip additive matter? Seems like every bottle I can find includes the additive. Also, does anyone have a brand or a specific product they use and recommend?
limited slip shouldnt matter if its a open diff in the trans, GL-5 has sulfur that will destroy brass synchros in older transmissions. consensus seems to be use RedLine or Royal Purple 75w-90 GL-4. ive used RedLine for years no issue
