ATF+ 4 in a transfer case

[gmctodd]

I'm pretty sure Dodge specs it for their trucks but what about a GMC? I have an 05 2500hd with a nv263. I drained the tranny and t/case fluid and am replacing the DEX III with DEX VI in the tranny, but have read here and other places about not using DEX VI in the t/case. WM has Valvoline "Full synthetic" ATF+4 for less than 5 bucks a QT. Would it be ok to use?
Thoughts....

Also most of the DEX VI products I see are labled as a semi syn at least. Is that standard for all? Like the WM ST stuff?

 

[Nick R]

Not unless it is specced by GM, which I doubt. It probably takes gear oil or Dex III. But don't put the ATF +4 in, it will probably mess it up. I'm sure someone who knows more about what it takes will be in here soon.

EDIT: I remember hearing that Dex VI specs can only be met by at least a Semi-syn.

 

[Stu_Rock]

I think it's a fair question. New Venture Gear supplied that transfer case. They were once part owned by Chrysler, and then for a while, fully owned by DCX.

 

[zrxkawboy]

ATF+4 would be fine. So would most any syn ATF (Mobil 1, etc).

 

[unDummy]

ATF+4 makes a great lube for diff's and xfer cases that require ATF like merc or dex. Either use the ATF+4 or a full synth Dex/Merc ATF like Mobil1, Amsoil, Redline, RoyalPurple...

 

[gmctodd]

OK

I used an advanced coupon and got two QTs of the Mobil1 ATF and a qt of 75w-90 for the front diff. I have never used it before. Is it supposed to smell like it is already burnt? That is the worst smelling ATF I have ever smelled. the bottles were sealed and the fluid looked nice and red, it just STINKS

 

[wn1998]

Good choice on the M1 ATF. It will be fine! Change it again in 2-3 years and you will be ok.

 

[pavelow]

I run ATF+4 in my t-case.....but Jeep specs it. As for what GM wants in yours, well, the factory spec is a good place to start.

 

[caravanmike]

i thought gm speced autotrak in their transfercases? especially since dexron3 lost its license? mike

 

[gmctodd]

Originally Posted By: caravanmike
i thought gm speced autotrak in their transfercases? especially since dexron3 lost its license? mike


GM specs autotrac II fluid in their AUTOMATIC t/cases. Since mine is electric it used DEX III for the FF. I believe GM now reccommends the same fluid used for manual trans (since DEX III no longer exists).

 

[gomes512]

I believe the 263 is a chain/planetary tcase. If that be the case then you could run olive oil if you'd have to.

 

[pavelow]

Run olive oil in a auto-trac transfer case and you'll be a couple grand lighter after it explodes on you. lol

 

[ac_tc]

Mother says that dex3 can be used in their transfer cases
but should be replaced at half the recommended mileage
compared to +3. (+4 wasent made yet but it should do even better.)So use +4 with confidence.
Source: Users manual from a -98 Durango.