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Old 03-29-2006, 12:14 PM   #1 (permalink)
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Transfer case and differential fluid change questions

I did a search and found the article from Star regarding changing the forward and rear differential fluid and transfer case fluid.
The article states: torque both plugs....can someone tell me the torque specs for the forward diff, rear diff, and transfer case plugs?
Also, I went out and bought the fluid. Is valvoline SAE 80W 90 okay to use for the diffs? The article says to use SAE 90. I dont know if the "80W' part will be a problem.
Thanks,
Mike
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Old 03-29-2006, 03:49 PM   #2 (permalink)
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RE: Transfer case and differential fluid change questions

The Valvoline product is a multi grade type which acts like an 80W fluid at low temps and a 90W fluid at high temps. It should work just fine in the diffs.
Presumably you purchased non synthetic ATF for the transfer case as is called for.

I don't have the torque specs but I am guessing you can figure them out by removing the plugs.
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Old 03-29-2006, 05:20 PM   #3 (permalink)
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RE: Transfer case and differential fluid change questions

I changed all fluids myself. The transfer case required a salon bottle with a slanted tip for pouring in the top plug hole. I used Dexron III ATF for the transfer case but my mechanic recommended I switch to the synthetic since it lasts longer. He said the return of the clicking noise after 5000 miles is indication the fluid isn't up to snuff. I really don't see why synthetic can't be used but if someone knows something I don't, please tell it!
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Old 03-30-2006, 10:20 AM   #4 (permalink)
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RE: Transfer case and differential fluid change questions

I did the front and rear diff this morning. Pretty easy. The most annoying part was getting the oil into the fill plug on the rear diff. Not a whole lot of space back there. I need to find the square 3/8 inch drive for the transfer case. Sears did not have anything like that when I checked.
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Old 03-30-2006, 04:51 PM   #5 (permalink)
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RE: Transfer case and differential fluid change questions

Quote:
Michael Pillay - 3/30/2006 1:20 PM

I did the front and rear diff this morning. Pretty easy. The most annoying part was getting the oil into the fill plug on the rear diff. Not a whole lot of space back there. I need to find the square 3/8 inch drive for the transfer case. Sears did not have anything like that when I checked.
Mike
Use the 3/8 inch EXTENSION. It works like a charm.[;)]
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Old 03-30-2006, 07:51 PM   #6 (permalink)
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RE: Transfer case and differential fluid change questions

I thinks me be suffering from deja vu[:o)]
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Old 03-30-2006, 07:55 PM   #7 (permalink)
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RE: Transfer case and differential fluid change questions

Quote:
Noodles - 3/30/2006 10:51 PM

I thinks me be suffering from deja vu[:o)]
Yep. I posted this and noticed his other thread. opened it and there it was, the same suggestion. It's funny how us Extremist/Elitist think alike!![8D]
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Old 03-31-2006, 04:25 AM   #8 (permalink)
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RE: Transfer case and differential fluid change questions

Are any additives used by M.B.?

esp. for the rear diffs?
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Old 03-31-2006, 05:35 AM   #9 (permalink)
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RE: Transfer case and differential fluid change questions

BE VERY CAREFUL WHEN TIGHTENING THE TRANSFER CASE SCREW!!!
I over thightened mine and the whole cover cracked!! Didn't seem to apply that much torque. Fortunetely, my friendly dealer replaced the entire TC under Starmark warranty.

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Old 06-01-2006, 02:08 PM   #10 (permalink)
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Would you mind posting that Star article? I had been having a knocking noise coming from under my ML320. The AAA diagnosic center recommended that I try replacing the transfer case oil. I convinced the guys at Jiffy Lube to do it ($30) with my oil (MB type 6 AT fluid - recommended by MB for w163 (w164 uses type 9) @$15/quart (needed 2.5 quarts)). Also needed a liquid pump ($17 at Kragen). So for about $100 the noise is gone. However, the oil was nearly black with silvery flicks in it so I have the suspicion that this may not be the end of this problem. I'll change the oil again in a few weeks to make sure its clean.
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