Synthetic oil for transfer case needed

[easytim]

I have a 1997 Wrangler Jeep, the dealer says my oil in the tranfer case is foaming and needs to be changed. I want to use a good synthetic oil.

I don't know how much oil is needed to change it or who sells a good synthtic oil, could someone give me some info on this info?

 

[aquariuscsm]

I`d go with an Amsoil that meets your application.

 

[lazaro]

Originally Posted By: aquariuscsm
I`d go with an Amsoil that meets your application.

I think it calls for Amsoil ATF, transfer case AP3,AP4 or for transfer case MA it calls for torque drive ATF product code ATD from Amsoil

 

[Pablo]

I would use Amsoil ATD.

Amsoil ATD link

A gallon will do two changes. (One short run, then the second fill will be nice and clean)

Why is the fluid foaming? Worn out? Contaminated?

 

[NHHEMI]

Royal Purple MaxATF or Synchromax. All depends on what your t-case calls for as far as fluid type.

 

[Chris142]

It holds about 1.5 qts.

 

[mstrjon32]

I use cheap-o Castrol Dex III ATF in my NP231 in my Cherokee, and with 175K it shifts into and out of 4WD like butter. IMO, don't bother with expensive fluid for the t-case, it's not hard on fluid and if you submerge it you're going to be changing it out anyway so it will be a waste. Every time I've drained my t-case the fluid comes out looking like new.

Better off spending money on quality gear oil for the diff's and transmission.

 

[Rabbler]

Try Mopar ATF+4
I think any quality Dex III would be fine though.
I'd be interested how they determined it was foaming...

 

[Gary Allan]

I guess if they saw it puking out of the snorkel ..or if it was whipped up into a lather upon draining.

 

[Rabbler]

It that's the case I would suspect overfilling or contamination.
Water ingestion?
I've seen that a few times if it's been off roaded and the vent hose is split or disconnected.

 

[Gary Allan]

Water ingestion would be my first thought. The dealer should have checked the snorkel plumbing if that was detected.

 

[bmwtechguy]

I disagree with transfercase fluid coming out clean and cheaping out on replacement fluid. I have yet to drain one over the years that the fluid came out looking good. You're talking about less than 2 quarts of unfiltered fluid. Unless you go swamp mudding on the weekends and then need to change it due to contamination, a higher quality fluid would be a better choice. Most people never change it, or if they do, only at 100k or 150k miles. Dex III will be sheared way down in viscosity and totally shot at that interval, proving little protection against wear.

 

[glenncof]

Wadding....that will do it if water exceeds breather hose. Maybe hose is off/cracked.

I used Redline 75W90 on a 1991 Range Rover

FYI, my 1997 Tahoe 4x4 has a breather hose with a check valve which is to be replaced if a change to synthetic was planned.

 

[ViragoBry]

For a quantity as small as this, I'd use the best fluid money can buy. You'll just have to decide if that's Amsoil or Redline. The easy availability of Redline near my home decided for me.

 

[unDummy]

1st, read the owners manual. Once you know the spec required, you'll know what the options are.

 

[OVERKILL]

I used Mobil 1 ATF in my Expedition's T-case. The fluid that came out was scary dark orange.

 

[another Todd]

I use Amsoil synthetic ATF. Fluid comes out clean after 30,000 miles. This is in a 99 cherokee.

 

[RKBA]

The NP231 is not a particularly picky unit when it comes to lubrication. Any ATF you happen to have a quart of is more than sufficient. Last year I stumbled into a ten cent a quart blowout of Type F at an Advance Auto. Wanna guess what's in my transfers cases right now?

It only takes a quart (2.2 pints to be exact) and is fairly easy to service - as long as they stay dry I do mine once a year.

 

[PT1]

Originally Posted By: NHHEMI
Royal Purple MaxATF or Synchromax. All depends on what your t-case calls for as far as fluid type.


RP & your car =

RP & Your wallet =

 

[NHHEMI]

Originally Posted By: PT1
Originally Posted By: NHHEMI
Royal Purple MaxATF or Synchromax. All depends on what your t-case calls for as far as fluid type.


RP & your car =

RP & Your wallet =

Now there is a constructive, mature, response that really adds to this thread.