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Transfer Case Lube Substitution? #4366994 03/29/17 09:32 PM
Joined: May 2002
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TheLoneRanger Offline OP
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The vehicle is a 2004 Ranger 4x4 with a chain-drive
transfer case, that specifies ATF as a lubricant.

Can I safely substitute 75W-90 synthetic gear oil
for the ATF in this application? Or is there a
better choice? Or should I simply stay with the
ATF?

Thanks in advance for any advice.


Some days you eat the bear, some days the bear eats you.....
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367000 03/29/17 09:36 PM
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Realtech214 Offline
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ATF Vs. Gear lube is a huge difference in Viscosity. You could probly run anything in there without ever noticing. Ive used GL5s where a much thinner fluid is spec'd with no issues before.

2cents


2015 Silverado Crew Cab 5.3 LT 120,xxx miles
2001 Suburban LT 145,xxx miles
- - - - - -
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367009 03/29/17 09:50 PM
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demarpaint Offline
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Why wouldn't you want to use the spec'd ATF? I have two Jeeps calling for ATF+4 in the transfer case, and no problems at all using it.

Using the ATF it calls for would be my recommendation.


God Bless Our Troops

Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367017 03/29/17 10:03 PM
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Killer223 Offline
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i use 30 wt engine oil in my 2011 ranger t-case. they have an oil pump in them i was told, so i'd stay away form something to thick.


19 accord 6sp 2.0T
04 5.9 cummins
95 12V NV4500.
11 ranger 4.0
18 crf450RX
19 Talon
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Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367018 03/29/17 10:07 PM
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Shannow Offline
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My Nissan specs ATF...or 75W90, ATF from the factory.

Replaced it early on with M1, then at 100k (km), it was near empty, and nearly purple in colour (no idea...).

But it runs well over 100C on the highway, so I replaced with Mobil 424, with is a Dexron GL4, about 9Cst for 40000km no issues.

(I'm back on universal synthetic ATF to see if the thicker oil had impacted economy, but it's completely hidden in the noise if it did)

Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367021 03/29/17 10:18 PM
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BrocLuno Offline
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Redline MTL. It'll still shift easily and be somewhere between AFT and traditional gear oil.

Electric shift I assume ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Transfer Case Lube Substitution? [Re: BrocLuno] #4367046 03/29/17 10:44 PM
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TheLoneRanger Offline OP
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Originally Posted By: demarpaint
Why wouldn't you want to use the spec'd ATF?....

It has a slight harmonic around 35 mph that I think is the
chain vibrating. The case has a damper bolted on it that's
supposed to absorb vibrations, but I thought a slightly
thicker oil might eliminate it entirely.

Originally Posted By: Killer223
.....they have an oil pump in them i was told,...

I wasn't aware of that. Good to know.

Originally Posted By: BrocLuno
.....Electric shift I assume ...

Yes it's electric shift on the fly.
My main concern is to not cause harm to the seals or bearings.
I hadn't thought of the Redline MTL...


Some days you eat the bear, some days the bear eats you.....
Re: Transfer Case Lube Substitution? [Re: Killer223] #4367054 03/29/17 10:55 PM
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zeng Offline
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Originally Posted By: Killer223
they have an oil pump in them i was told, so i'd stay away form something to thick.

Is this Tcase friction-clutch operated ? ....... or synchros ?

Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367070 03/29/17 11:33 PM
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Rand Offline
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I'd stick with an atf.. can always use a thicker atf.

IIRC I used redline d4 in those with good results.


2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367078 03/29/17 11:55 PM
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DemoFly Offline
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Chain lubrication is quite insignificant. Bearing and planetary lubrication is what matters.

I'm one to support using 10w30 or 5w20 synthetic in most T-cases in substitution for ATF, but I wouldn't be caught dead putting gear oil in a T-case.

Last edited by DemoFly; 03/29/17 11:56 PM.

Pushrods, please.
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367085 03/30/17 12:13 AM
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Dyusik Offline
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Be nice to your synchros, don't give them GL5.


95 Cherokee 190K DELO XLE 10W30, XG8
04 YZF-R1 20K Frankenbrew 20w50ish, XG7317
14 RX450h 50k M1 AFE 0w20, WIX 57047
18 RAM 3500 10k Delvac 15w40, DBL7349
96 Cherokee
Re: Transfer Case Lube Substitution? [Re: Dyusik] #4367114 03/30/17 02:34 AM
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Rand Offline
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Originally Posted By: Dyusik
Be nice to your synchros, don't give them GL5.


What Synchros?


2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367220 03/30/17 07:53 AM
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Chris142 Online Content
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No you should not use gear oil. It has an oil pump and its designed to pump a thin oil. You might be able yo get away with a 5w20.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367228 03/30/17 08:10 AM
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Donald Offline
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Originally Posted By: TheLoneRanger
The vehicle is a 2004 Ranger 4x4 with a chain-drive
transfer case, that specifies ATF as a lubricant.

Can I safely substitute 75W-90 synthetic gear oil
for the ATF in this application? Or is there a
better choice? Or should I simply stay with the
ATF?

Thanks in advance for any advice.


I cannot understand why you are asking? Can't you follow directions? Use ATF.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Transfer Case Lube Substitution? [Re: TheLoneRanger] #4367269 03/30/17 09:23 AM
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njohnson Offline
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Valvoline makes a fluid for transfer cases, can be used in ones calling for ATF.

Our one SUV has the transfer case which calls for Dex III. I was thinking about trying this in it. Going by the product description, it sounds like a beefier, more robust product, compared to ATF.

http://www.valvoline.com/our-products/au...sfer-case-fluid

Last edited by njohnson; 03/30/17 09:24 AM.
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