I have been using Redline 75w90 in the Rear diff and Transfer case, with Pennzoil Synchromesh in the tranny and I have not had a problem.

 

hmmming running pennzoil synchromesh in the tranny.... still scared to try other fluids in the tc and rear diff.... so many different opinions!

 

stay w/ OEM fluids then you cant blame anyone or any product if your drive train parts fail. Dont create problems. It the fluid quality is an issue than change it more often, dont change brands.

 

I agree but if you live in Oregon where do you buy OEM fluids??? The dealerships won't sell it to us. No one wants us to use Redline and I've herd not to use BG. I'm to the point I'm go to buy what's at auto zone in the right specs.

If something does blow up I will argue with mitshu much like people did when they wanted to use different oils.

 

Where can we get OEM transfer case fluid? I can not find it anywhere and the dealers around here so stupid as hell.

 

Hi: I previously used the 75w-90 GL5 Red Line on my transfer which ended on two blown transfer. At this time I'm using red line shockproof light with 0 problem in a long time. On the tranny I have been using MT-90 with better results than the BG syncroshift. The car has a lot of power and no problem at all.
Everybody has differents opinion, so hope mines help you.

 

^ good info thanks.

 

So what do you think?

Transmission - Penzoil Syncomesh
Transfer Case - Red Line Shockproof
Rear Diff - Moblie 1 75w-90

 

Ok how about this after going to the store I'm looking at using:

Transmission - Red Line MT-90
Transfer Case - Red Line Heavy Shockproof
Rear Diff - Red Line 75W90 GL-5+

I know people have had problems using 75W90 in there Transfer Case and thank you for all that advice but looking around it seems that the Shockproof works great. Let me know if there's more disscusion on this.

 

Looks like what I will be doing as well. Where can I find Red Line Heavy Shockproof? Auto Zone does not carry it here.

 

Stuarts Auto Supply, if you have one is about the only place that carries everything. I spent less then $30 bucks for everything.

 

The OEM fluid is called DiaQueen LSD... I personally say use the OEM fluid or BG Syncro Shift...

I used Mobil 1 gear lube and almost destroyed my syncros... I switched to BG and the syncros are working again, eliminated 2nd and 4th gear grinds.

 

You used BG for everything?

 

14K miles so far without any problem except noisy tranny.

Redline MT-90 tranny.
Mobil 1 synthetic gear oil 75-90W TC & Diff.

I shift at 7500+rpm when going hard and shift into first while coming to a stop around 15+mph. Used to get lots of misshifts with the OE fluid but with Redline, no problem getting into gears.

 

Thanks for the diaqueen P/N I think that will cure all those blown T/C problems.

As far as te transmission I have been researching this for a week now. I can not get the Mitsubishi Diamond GL-4 without ordering a 5 gal pail, but I found out that Castrol makes a 75w-85 GL-4 named castrol Syntorq LT it is fully synthetic and sold in quarts at GM dealer P/N 12346190. It might be the same as the Mitsubishi Diamond. I heard that it is pricy maybe $20.00 a qt but worth it until I order the mitsu Diamond.

This is a good find. do your oun checking on this gear lube.

Penzoil does not recommend the synchromesh in out trannies! give them a call first. The better shifting that you are experiencing is actually wearing out your trannies faster. I read a thread about this on Honda-Tech board and confirmed with Penn/quakerstate. do not experiment with your $30k toy.