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How often change Differential fluid? #4531288
10/01/17 03:59 PM
10/01/17 03:59 PM
Joined: May 2012
Posts: 953
Rio Rancho, NM
Pajero Offline OP
Pajero  Offline OP
Joined: May 2012
Posts: 953
Rio Rancho, NM
I have 1994 Montero SR 3.5 DOHC. I am original owner and it's garage kept. I 've always changed the diff fluids every 30,000 miles. The owners manual doesn't mention the diff fluid, except for specs. When I had it done at the Stealer, they told me that they don't service the diffs unless there are problems. I'm OCD I guess.....What are your opinions?


Respectfully,

Pajero!


Always remember "Planned obsolescence."

1994 Montero SR 3.5 DOHC, 133,xxx
Fram Ultra/ Snorkel with Pre-filter
K-9-Co-pilot
Re: How often change Differential fluid? [Re: Pajero] #4531296
10/01/17 04:06 PM
10/01/17 04:06 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
For the dealership, there's no profit in a drain and refill of a couple of pints of diff fluid but there is for a repair. Differentials often go the life of the vehicle with no checks or maintenance of any kind.

I change the Red Line in my 03 V8 4Runner 2x4 every 30-50K when I think about it. At 160K+ of desert driving and towing there's been no noise or any other indication of a problem.

Re: How often change Differential fluid? [Re: Pajero] #4531298
10/01/17 04:07 PM
10/01/17 04:07 PM
Joined: Apr 2010
Posts: 13,534
Chicago, IL
dparm Offline
dparm  Offline
Joined: Apr 2010
Posts: 13,534
Chicago, IL
30k seems very frequent unless the truck is constantly being used in extreme conditions.

OEM recommendations are kind of all over the place. Some claim lifetime, as you said -- which I interpret to mean "warranty duration + 1 day". Some OEMs make it easy by saying "every 3rd/4th/5th/etc oil change" which makes it easy. Others just stick to "every X years".

Here's my two cents: pay for an analysis and see if the fluid is getting contaminated, breaking down, etc, and then adjust your intervals from there. I suspect that a 30k interval is pouring good fluid down the drain unless those diffs are notorious for destroying gear lube. As anecdotal as this is, but my old BMW M3's rear differential had the fluid changed every 3 oil changes and it was still fine (which included hard driving on a race track).


2017 Chevrolet Corvette Grand Sport
Re: How often change Differential fluid? [Re: Pajero] #4531305
10/01/17 04:12 PM
10/01/17 04:12 PM
Joined: Sep 2010
Posts: 7,559
SE Texas
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,559
SE Texas
On a new vehicle, I dump the FF at 10K miles or so. The majority of the wear happens very early in an axle's life. You can then extend the OCI out quite a bit from there, even with towing. To get an idea of what I mean take a look at the UOAs of the rear axle in my retired 2010 FX4; note how much iron was generated at the first OC, but less and less per mile even though the subsequent OCs were run much longer.


2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU
Re: How often change Differential fluid? [Re: Pajero] #4531349
10/01/17 04:55 PM
10/01/17 04:55 PM
Joined: Jun 2012
Posts: 1,699
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,699
USA
^^^^^^This^^^^^^ I've changed out the FF on my new rear gear differentials OR first thing on any used one. RedLine is my choice also. grin



Re: How often change Differential fluid? [Re: Pajero] #4531389
10/01/17 05:40 PM
10/01/17 05:40 PM
Joined: Aug 2004
Posts: 4,635
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,635
Katy, Republic of Texas
I agree with the above. An early change (10,000 miles or so) the get the initial wear metals and such out, or first thing when you buy a used vehicle.
After that, "regular" use is 50,000 miles or so, if "severe duty" (off roading, water crossing or submersion, frequent towing/hauling etc), then more often, how much more varies depending on use (like a long water submersion, ASAP).


1994 Honda VT1100: Peak 15w-40/PSL/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

Re: How often change Differential fluid? [Re: Pajero] #4531431
10/01/17 06:20 PM
10/01/17 06:20 PM
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
Panzerman Offline
Panzerman  Offline
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
Dodge Lifetime warranty requires every 15,000 miles with Synthetic 75w90 which is insane. It looked bad the first time grayish and ugly after that it's a waste of oil and money. Comes out golden and new. I think one early change and then every 100,000 if using a top name synthetic.



2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack
Re: How often change Differential fluid? [Re: Pajero] #4531521
10/01/17 07:48 PM
10/01/17 07:48 PM
Joined: Nov 2016
Posts: 1,278
WI
HoosierJeeper Offline
HoosierJeeper  Offline
Joined: Nov 2016
Posts: 1,278
WI
I (embarrassingly) just changed the diff fluids on my LR3 for the first time this weekend - 160k miles and the fluid wasn't terrible. Put in Mobil 1 75w90. Still brown. I change the diff fluids in my Liberty every other year (or 20-30k miles), as I wheel it so there's a chance of water getting in. I don't use synthetic in it.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: How often change Differential fluid? [Re: Pajero] #4531536
10/01/17 08:00 PM
10/01/17 08:00 PM
Joined: Dec 2013
Posts: 385
Kuala Lumpur ,Malaysia
alcyon Offline
alcyon  Offline
Joined: Dec 2013
Posts: 385
Kuala Lumpur ,Malaysia
Diff fluid is the same as manual trans fluid ? 75W-90 ?


Kyosho Optima Mid SWB, LWB and Lazer ZX
1991 Proton Saga 1.3S SOLD
1989 Toyota Soarer GT Twin Turbo L
Re: How often change Differential fluid? [Re: Pajero] #4531543
10/01/17 08:05 PM
10/01/17 08:05 PM
Joined: Feb 2017
Posts: 172
Vancouver, Canada
dubber09 Offline
dubber09  Offline
Joined: Feb 2017
Posts: 172
Vancouver, Canada
Keep doing it every 30K miles. I'd suggest doing first one sooner thou, after 10-20K miles or so.

Re: How often change Differential fluid? [Re: Pajero] #4531573
10/01/17 08:38 PM
10/01/17 08:38 PM
Joined: Aug 2012
Posts: 3,041
Cincinnati
donnyj08 Offline
donnyj08  Offline
Joined: Aug 2012
Posts: 3,041
Cincinnati
I do one early in the vehicles life. Less than 30k miles. After that on a 40k mile interval, at least for my Silverado. I always do front and rear at the same time.

Transfer case before winter every year.

Last edited by donnyj08; 10/01/17 08:40 PM.

2008 Silverado Z71 LT 90k Maxlife FS 5w30
2010 Ford Escape 172k QSUD 5w20
2016 Yamaha XSR900 12k, Rotella 15w40 Yamaha Filter.
Re: How often change Differential fluid? [Re: Pajero] #4531574
10/01/17 08:39 PM
10/01/17 08:39 PM
Joined: Jun 2002
Posts: 12,518
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,518
The Motor City
I agree with above, changing the initial fluid early after break-in. It usually comes out looking like metallic paint. Afterward, changes aren't as important, especially if synthetic fluid is used.

Re: How often change Differential fluid? [Re: Pajero] #4531580
10/01/17 08:51 PM
10/01/17 08:51 PM
Joined: Dec 2009
Posts: 288
Utah
ddtmoto Offline
ddtmoto  Offline
Joined: Dec 2009
Posts: 288
Utah
No, GL4 and GL5 are not interchangeable. Not the same.


Mustang GT 5.0 Brembo '11
ram 5.9
TL1000S
GSXR1000
DRZ400E
'09 GTZ1400 Concours
Re: How often change Differential fluid? [Re: Pajero] #4531591
10/01/17 09:09 PM
10/01/17 09:09 PM
Joined: Jun 2003
Posts: 17,345
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,345
Deplorable in apple valley, ca
Jeep recomends 12k on my jeep.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: How often change Differential fluid? [Re: Pajero] #4531601
10/01/17 09:25 PM
10/01/17 09:25 PM
Joined: Jul 2003
Posts: 4,747
New Zealand
Silk Online content
Silk  Online Content
Joined: Jul 2003
Posts: 4,747
New Zealand
These days Mitsubishi have 45,000km for gearbox and transfer oil changes, and 60,000km for final drives. Or half that for severe service.


1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
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