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06-22-2006, 04:23 AM
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Hummer Expert
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Join Date: Oct 2005
Location: MARYLAND
Posts: 779
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15k mile service
how much does your dealer charge for it? what is the best oil to run in the diffs, let me know what oil or fluids i can buy that are better than what dealer will run, i wanna put the best in that i can , i think someone said royal purple let me know
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06-22-2006, 04:32 AM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 42
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Re: 15k mile service
I just did Royal Purple in the transmission, diff, transfer case and engine at 40k miles. I have noticed smoother shifting in the transmission.  |
06-22-2006, 05:08 AM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
Posts: 1,251
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Re: 15k mile service
Make sure you use a 75/90w synthetic gear oil in both diffs, especially in colder climates. I personally have had lots of positive feedback from customers using mobil one in trans and t-case, but have had no experience with royal purple. Only seen one customer use it as I don't believe it is readily available in Canada(he had it shipped from the US). Just another opinion.
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06-22-2006, 05:45 PM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 42
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Re: 15k mile service
Royal Purple's web site says it's available in 32 cities / 5 provinces in Canada.
http://www.royalpurple.com/dealers/dealers.html
I paid $7.50US a quart for gear oil and ATF, and $5.50 for motor oil at a local Mazda racing shop. |
06-23-2006, 12:11 AM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
Posts: 1,251
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Re: 15k mile service
Good to know, thanks.
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06-23-2006, 11:14 PM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 57
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Re: 15k mile service
How many quarts of ATF, and how many of gear lube? I cant find it in the manual.
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06-25-2006, 04:06 AM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
Posts: 1,251
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Re: 15k mile service
Front diff takes 2 liters rear diff takes just under 3 liters. T-case approx 2 liters and transmission if pan removed and filter changed will take from 4.5 liters to 6 liters, most times an even 5 liters does the job.
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06-26-2006, 10:20 PM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 57
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Re: 15k mile service
Quote:
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Originally Posted by HUMTECH
Front diff takes 2 liters rear diff takes just under 3 liters. T-case approx 2 liters and transmission if pan removed and filter changed will take from 4.5 liters to 6 liters, most times an even 5 liters does the job.
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My local GMC dealer is telling me 16 quarts for the tranny. Is he off his rocker? |
06-27-2006, 07:32 AM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 42
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Re: 15k mile service
I used....
6 quarts of 5W30 motor oil
14 quarts of ATF (did a complete flush & pan drop)
6 quarts of 75W90 gear oil
I would suggest getting one extra of each for your off-road emergency kit!
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06-27-2006, 07:38 PM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
Posts: 1,251
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Re: 15k mile service
He is correct, 12-16 quarts if doing A flush, 5 if you just drop the pan and change the filter
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