GL4 and GL5

[DCIV]

Can I put GL5 in my TC and also in the rear diff on my vr4? I know I can put GL5 in the rear diff but I don’t see why I couldn’t in my TC, curious on if anyone knows much about this topic. I got some red line heavy shockproof rated at 75w90 but have a cushioning effect of up to 75w250.

Thoughts?

Coop

[stealthee]

GL5 is bad for brass synchros. Being there are no synchros in the t-case, I don't see how it would be bad for it.

[DCIV]

Just asking as I think the manual says GL4 in the TC. I could be wrong.


Coop

[ChargerX3]

Iirc tc is shockproof light and the diff is heavy. GL5 deteriorates soft metals like synchros.

[mjannusch]

I use the Shockproof Heavy in my transfercases. The DSM guys use it too. Works good.

[aaronatstate]

I've run Shockproof Heavy in my TC since basically day one. I use the Redline 75w90 in the rear diff, and Redline MT-85 in the transmission. No issues with them.

[DCIV]

But no reason not to run it in both TC and rear diff correct?


Coop

[aaronatstate]

[quote=""DCIV""]But no reason not to run it in both TC and rear diff correct?


Coop[/quote]

I've had the 75w90 in my rear diff for 75,000 miles. :d ontknow: Probably need to change it soon

[DCIV]

[quote=""aaronatstate""]I've had the 75w90 in my rear diff for 75,000 miles. :d ontknow: Probably need to change it soon [/quote]

I have never changed or checked mine.


Coop

[ChargerX3]

[quote=""DCIV""]I have never changed or checked mine.


Coop[/quote]

Yea just trade it in on something newer.

[Chris GTO TT]

[quote=""ChargerX3""]Yea just trade it in on something newer.[/quote]

[DCIV]

[quote=""ChargerX3""]Yea just trade it in on something newer.[/quote]

I should after the night I had with it.

Long story short my fill bolt is stripped. It came out just fine, it never even tried to tighten again.

Read lots, too thin for a heli, if I swap it I need to check a bearing preload, have to pull the TC to take off the cover.

All stuff that turned a 40 min job into something out of my wheel house. I don’t know how to check bearing preload....

Very pissed right now.


Coop

[ChargerX3]

Yea that blows.

[aaronatstate]

[quote=""DCIV""]I should after the night I had with it.

Long story short my fill bolt is stripped. It came out just fine, it never even tried to tighten again.

Read lots, too thin for a heli, if I swap it I need to check a bearing preload, have to pull the TC to take off the cover.

All stuff that turned a 40 min job into something out of my wheel house. I don’t know how to check bearing preload....

Very pissed right now.


Coop[/quote]

Which fill plug did you use?

[DCIV]

[quote=""aaronatstate""]Which fill plug did you use?[/quote]

The one on the cover. I guess some use the vent hole but I’ve always used the cover one.


Coop

[aaronatstate]

[quote=""DCIV""]The one on the cover. I guess some use the vent hole but I’ve always used the cover one.


Coop[/quote]

The true fill hole on the 5sp transfer case is actually on the front of the transfer case (the only bolt with the head towards the front of the car).

[vr4]

[quote=""aaronatstate""]The true fill hole on the 5sp transfer case is actually on the front of the transfer case (the only bolt with the head towards the front of the car).[/quote]

This. Early 5 speeds didn't even have the bolt on the cover

[DCIV]

So what’s the bolt on the cover for?


Coop

[ChargerX3]

[quote=""DCIV""]So what’s the bolt on the cover for?


Coop[/quote]

Apparently for stripping out.

[DCIV]

Might have lucked up. I made sure I reversed the thread till it clicked. And then even before when putting it in and out it would get to the end with some tension before just spinning. So I used a thick copper washer, screwed it on, got enough tension I felt it was okay. Now obviously I will take it on a spirited drive and check it. But I may have lucked out.


Coop