View Full Version : Tranny fluid recommendations

09-02-2012, 01:29 PM
Just picked up a 78 FJ40 (Luke's). I'm base lining the fluids. Seems like there are a lot of opinions on what 90w (GL-4/GL-5/synethetic/dino/ect) to use in the tranny, t-case and diffs. I searched but did not find what I was looking for. Whats the general consenses?

I also discovered my front diff fluid has mixed with the birf grease. Time for a knuckle and wheel bearing rebuild. With only 92k miles, the grease might be original:eek: I'll be posting a separate question on that.


09-02-2012, 03:09 PM
Tranny and Transfer I use Redline MT-90. It is a synthetic designed for the older manual trans.
DO NOT use other modern synthetics as they will eat up the bushings in the older units.

09-02-2012, 03:42 PM
I use dino 90wt. I figured that's what was available when mine was built (77), and would be good for replacement...

09-02-2012, 03:56 PM
tranny And Transfer I Use Redline Mt-90. It Is A Synthetic Designed For The Older Manual Trans.
Do Not Use Other Modern Synthetics As They Will Eat Up The Bushings In The Older Units.


09-02-2012, 09:30 PM
I generally use what ever Redline product that matches the vehicles needs too when it comes to gear oil.

09-03-2012, 01:22 PM
Redline it is! Thanks