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2005 GMC Yukon Differential Fluid


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9 replies to this topic

#1 HaroldCallahan

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Posted 06 November 2005 - 08:32 PM

At what mileage should the factory differential fluid be changed out of a new GMC Yukon ? What would be the best fluid to use ?

#2 DJinCO

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Posted 06 November 2005 - 08:38 PM

I think the manual says 50,000 miles. Only use the GM fluid (aka smurf fluid). There are no other fluids that meet the specs. It's not all that expensive at the dealer.
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2001 Chevy Tahoe 4x4, 5.3L; Westers Tune, Pennzoil Platinum, Amsoil ATF and gear lube. BFG AT's in the summer and Bridgestone Blizzak's in the winter. Ranch Hand Bull Nose bumpers (F&R) with Lightforce 170mm lights.

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#3 Aggiediver

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Posted 06 November 2005 - 09:58 PM

The differential does not take the blue fluid, the blue Auto trac fluid is for the transfer case.

The factory differential fluid is more purple and it is very expensive ($25+/quart depending on dealer). I think the general consensus on this board is that any synthetic 75-90 gear oil will work fine.

The blue autotrac fluid is not that expensive, and it is the only thing that should be put in the Auto-Trac transfer case
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#4 99silveradoz71

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Posted 06 November 2005 - 10:24 PM

Robot hit it right on. I used the blue juice in my transfer case and mobil 1 in the rear end. I've got an open 3.73.
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#5 Valsport

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Posted 06 November 2005 - 11:29 PM

yeah im not sure where you heard that mess. Any synthetic 75w 90 gear oil meets the specs.
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#6 DJinCO

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Posted 06 November 2005 - 11:41 PM

Geeze, sorry about my bad info. I wasn't thinking. You are correct, the TRANSFER case takes the smurf fluid. Duhhh, lack of reading the post carefully..my bad.

OK, back to the question. IMHO, if you tow, I recommend changing with a fully synthetic, like M1 about every 15-20K miles. This could be overkill, but it does work in my situation.

I changed my rear diff fluid at 3000 miles then 15K, 30K, 45K and 60K. I also changed to M1 (synthetic) for the front diff also. Stock is dino fliud in the front and synth in the rear. It was explained to be that the front diff doesn't get used as much as the rear.

OK, for many, but my front diff gets a workout also.

Hope this is back on track!
Doug in Colorado

2001 Chevy Tahoe 4x4, 5.3L; Westers Tune, Pennzoil Platinum, Amsoil ATF and gear lube. BFG AT's in the summer and Bridgestone Blizzak's in the winter. Ranch Hand Bull Nose bumpers (F&R) with Lightforce 170mm lights.

2002 Chevy Tahoe LT 4x4, 5.3L

"Sidewalks are just part of the drivable terrain - That's why I have a 4x4!"

#7 Bish

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Posted 07 November 2005 - 08:38 AM

Mibil 1 every 30K here. Don't forget if you tow, you are supposed to change it after your first 500 miles of towing. I tow a couple times a month so i change mine a little early. If not towing, stick to every 50K IMO.
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#8 Aggiediver

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Posted 07 November 2005 - 11:54 AM

DJ,

Wasn't trying to flame at all, I'm usually the one who has problems reading so i understand.




I'm planning to put M1 in both front and rear soon (23k on the clock now). Probably will change every 25k. Probably go ahead and do the t-case while i'm under there too.

I didn't know anything about the 500 mile thing for the first change, but i haven't done any heavy towing, so i'm assuming i'll be ok.

I don't have a drain plug in my rear diff, you guys use gasket sealer on your pumpkin gaskets or not? I've done both on previous trucks and they always seem to seep a little for me.
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#9 Valsport

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Posted 08 November 2005 - 08:35 PM

i used a little rtv when i did mine
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#10 liteswap

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Posted 08 November 2005 - 09:52 PM

i used a little rtv when i did mine

<{POST_SNAPBACK}>


What about using some Redline Shockproof Lightweight? Ive got cases of the stuff... :dupe:
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