What gear oil for my tranny

[Vanessa Brake]

I'm pretty stoked for you too....no more gay sunfire lol

[Dan Harshey]

I've used a mixture of Redline MTL/MT90 in my FWD transmission and no shifting issues cold or warm.  In my AWD trans i've been using Pennzoil Synchromesh and it grinds slightly when cold, but fine when warm, but there is a lot more moving around in an AWD trans.  Almost considering switching to the MTL/MT90 mix to see if it works any better.

[GlenMartin]

ok sorry to thread jack, but this is an awsome thread and i need to do this. i think i am going to go with the mt90 as well, do i want the gl-4? what would be a good oil for the diff? same thing? how much am i going to need?

sorry i didn't search before posting this. dont have time as i am making dinner, and posting at the same time.......yikes.

[John Hartman]

diffs use GL5.  No yellow metals in there.

Use the GL4 in the tranny.  Do your transfer case too.  Same as tranny.

I may change out the oil in the Talon as its definately making more torque than the one in the Galant. 

[CamWeiss]

I'm running Redline Shockproof Heavy for my rear diff, Glen.

Good oil and fairly cheap. I think I had leftovers from a quart (Did it just over a year ago, probably time to change it again).

[John Hartman]

Gear oil should last ALOT longer than that Cam, unless you got water and mud etc in there?

[GlenMartin]

I'm running Redline Shockproof Heavy for my rear diff, Glen.

Good oil and fairly cheap. I think I had leftovers from a quart (Did it just over a year ago, probably time to change it again).

thanx cam.

[Dan Silburn]

I used the Mt 90 redline shockproof for my trans and 75-90 for my rear diff and transfer case.

[CamWeiss]

Gear oil should last ALOT longer than that Cam, unless you got water and mud etc in there?

Nope, should be clean.

What would be an appropriate interval for gear oil on diffs & trans?

[John Hartman]

several years I would say.

I could look it up on Alldata if you like, or in the manual, but a lot longer than a year.  There is no combustion or extreme heat in there like in an engine.

[Mike Hewitt]

I've heard on some newer vehicles it's upwards of 70 000k+

[Ivan Skare]

I pesonally use mt90 in the tranny and tcase, and shockproof in the diff.

[Dan Harshey]

diffs use GL5.  No yellow metals in there.

Use the GL4 in the tranny.  Do your transfer case too.  Same as tranny.

I may change out the oil in the Talon as its definately making more torque than the one in the Galant. 

I've been running Redline Heavy Shockproof in my transfer case, and rear diff.  Correct me if i'm wrong but there aren't any yellow metals in the t-case, so wouldn't a GL-5 be ok for T-case and Rear Diff?  Just make sure to stick to GL-4 in the Transmission.

[John Hartman]

no yellow metals in the tcase as far as I know, but its supposed to have the same oil viscosity as the tranny, so that gear oil is pretty heavy for it.

[Brett Haviland]

My tranny blew up to pieces all over the highway.  I was running redline MT90.   All the other times i was running Royal purple/lucas 75w90 or penzoil syncromesh and never had a problem with them blowing into little pieces.