Well, since 1 or 2 people have stated that using Redline 75w90 in the transfer case and rear diff has cause the transfer case to mess up, how many actually use 75w90 in the transfer case and diff without any problems what so ever?? I have it in, and still seem fine....who else??

Been using it for 9k miles. No problems so far.

- Steve

w3rd!

just to chime in

-blew first one driving from Portland to Seattle going ~110mph for 1.5hrs at 4300rpm or so (Thank you Valentine One!!) with Redline 75w90 in the TC.

-blew second one doing ummm "tr@ck activities" with Redline 75w90 in TC.

-now im on the third one. Its been running good for 8000 miles with 300+whp. It sounds like a banshee when decelerating though... when I had Redline in, the decel noise was minimal, but it never stayed together. Isnt that odd??

btw - i dont think redline in the rear diff is an issue, just in the TC. Even though the GL rating is the same, the gear oil is not!

hmm, maybe just a case of bad luck??? Then, on my next change, what should I replace the redline fluids in the diffs with then?? I dont want to go to the dealer and have them screw it all up, and pay out the *** to have them do it when i can do it?? I will still use synchromesh in the tranny though.

you dealer should have the tc gear oil on hand. if not they should sell it to you. If not ask someone like Buschur or Vishnu to get some.

Syncromesh is like crack for the tranny, it cant get enough of it! =)

I just dont feel like going to the dealer at all to have them change the driveline fluids, is there anything that is equivalent?? I changed my fluids at around 13k, and am at 22k now, so i will be changing them again around 28k. Any advice??

I think you have changed them enough for a while, personally. =)

If you can get your car LEVEL on all 4 jack points, then change it yourself. If you cant, have the dealer do it if you insist on changing the drivetrain fluid.

any fluid out besides the redline 75w90 that would be equivalent or "just as good as OEM" since Redline was the best in the past, but now the worst?

I have been using redline in all my drivetrain for 6k miles and no problem..

yeah. 9k here...

75W-90 oil is thinner than what is required by the manual. I'd change it out ASAP or be prepared to bend over for another t-case.

Here are the specs from the shop manual:

Odd, me and plenty of others have ran this setup perfectly fine with no problems.

No short term problems. There is a reason why Mitsu lists these requirements. They've probably done the long term testing to come up w/ these specs. I'd try to stick with it.

I think I've read enough about people blowing their t-cases while using redline fluids to be concerned. I remember reading a thread where Buschur mentioned he broke two t-cases while using Redline fluids. When he switched back to the OE fluid, the breakages stopped. Take this information FWIW.