Before anyone starts I have searched. Some posts are old and with time opinions change

I am set to get the driveline fluids changed and from most of the old posts the safest seems to be Diaqueen.

What have you used and what were your results.

I'm also curious as to how much this costed you. Pm me if you want on that

This is on a Stock 9 with 350 WHP

 

I've been using OEM Diaqueen in the transfer case and rear differential. Amsoil for the transmission and engine oil. Never had any issues and don't see a reason to change.

I did the labor myself and only paid for fluids.

 

Diaqueen is pretty much a fail safe bet although there are better fluids out there.

Where there are open diffs a good compatible synthetic fluid is fine but with the OEM clutch type stuff be it rear or the few upgraded OEM front LSDs which are also clutch type Diaqueen is all I'd be willing to run. That's what Mits had in mind and clutch types are very sensitive to fluid.

When I get my Tcase built with a wavetrac though I'll run Motul 300. I've run that in a couple FWD wavetrac equipped gear boxes and it is phenomenal stuff. Shifts great and the performance of the diff is unparalleled.

 

Nothing better than oem diaqueen under 500hp

I use it in the tcase, diff and tranny

 

What GL am I looking for on the Diaqueen?

So royal purple it OTD. It was suggested to me by the dealer along with BG for the tranny

 

I'm using Motul gear 300 in the trans, Motul FF LSD in the TC and Motul competition gear in the diff.

My trans (6 speed) was notchy, grinding in 2 and 3 and extremely hard to shift when cold. Switched to Motul (from whatever PO was using) and now it is just a little notchy. Keeping in mind this doesn't have any synchromesh added or any kind of blend, just straight Motul fluid.

 

I use Diaqueen in the diffs and transfer case. AMSoil in the tranny. There are 2 different Diaqueens. Make sure you get the one for differentials, NOT for automatic transmissions.

 

OEM Fluids in the trans, t-case, and rear diff.
80k+ miles on stock IX with 350hp