Friction modifier in my manual trans???

[DailyDriver]

I've got 260K on the truck. I changed my slave cylinder 2 weeks ago and when I drained the fluid it was almost black. I put fresh ATF (Dextron/Mercon) in it. Now the tranny whines a bit. Not having any problems but just annoying. I know the friction modifier helps with the rear end & folks have put it in whiney power steering pumps with some success. Anyone try this in the tranny?

 

[DailyDriver]

No thoughts on this???

 

[Original_Ranger84]

Are you talking about the t case or transmission? because i am pretty sure manual transmissions are supposed to take 80w90 gear oil...? Well in my 84 it takes 80w90 in the trans and atf in the t case.

 

[nooberiffic]

im pretty sure the Mazda M50 is supposed to take ATF


http://www.therangerstation.com/tech_library/ManualTransmission.html

Mitsubishi takes gear oil, the mazda takes ATF

 

[exbass94]

A 1995 truck would have the M5OD trans which uses Mercon ATF.