Help finding a gl4 gear oil for fm146

[87RangerXLTct]

Having a hard time finding a gl4 spec in 80w, napa sells a 85w-90 gl4 but might be a little thick? I can also find valvoline 80w-90 but it's gl4,gl5 spec and says limited slip on the bottle? What are you folks running in fm145,fm146 manual transmissions?

 

[Spott]

I rebuilt my FM146 with generic house-brand 80W-90 gear oil, and didn't have any problems for over 3 years until some lady cut across traffic and wrecked my '88.

Speaking of which, I probably oughta update my profile picture one of these days.

 

[Twister]

Amsoil has a 75w-90 GL4 that I have used.

http://www.amsoil.com/shop/by-produ...and-transaxle-gear-lube-75w-90/?code=MTGQT-EA

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