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2500HD/3500 HD Trucks & Drivetrain Discussion Forum for the 2001 & newer 2500HD/3500 Trucks, Transmissions & Drivetrain

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  #11  
Old 04-18-2002, 04:28 PM
Edmac Edmac is offline
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Maverick:
Yes at least the 75W140 Amsoil Syn is rated API GL-5, that what I run in mine. I think Eaton recommends this weight for heavy towing.
Ed
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  #12  
Old 04-18-2002, 04:40 PM
konacat konacat is offline
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See my previous post.

posted 04-12-2002 11:28 AM
--------------------------------------------------------------------------------
Just hit 1500 miles and have chosen to change engine oil and rear end lube. Get the junk out of it early. Purchased my own gm filter and Rotella dino oil (4gal @ $5.89). Had the local quick oil change location do the service for me. They charged me $39.99 for the rear end lube (Pennzoil 75-90w synthetic) and changed my oil and filter with no additional charge. They even primed the oil filter! Although I am new to diesels, I do not believe that any new noises have occurred.

Yes it is GL-5. Cut and past link below for more info.

http://www.pennzoil.com/TechData/pds...lusSuperEW.pdf

[ 04-18-2002: Message edited by: konacat ]

[ 04-18-2002: Message edited by: konacat ]</p>
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  #13  
Old 04-18-2002, 05:50 PM
Tommy turbo Tommy turbo is offline
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I changed my diff at 500 miles. filled with Castrol 75/90 gl-5 full synthetic. have 18000 miles now no problems.
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  #14  
Old 04-20-2002, 03:20 PM
gdblake gdblake is offline
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DMAXMAVERICK (AND /OR OTHERS)--I just purchased Mobil-1 75W-90--it might have a modifier added. Will this be OK for the G80 locker or should I return it? The product sheet states it exceeds requirements for ALL car and truck rear axles, and reduces chatter in limited slips. It states it is suitable for all applications requiring API service GL-5. Please respond. Thank you.

[ 04-20-2002: Message edited by: gdblake ]</p>
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  #15  
Old 04-21-2002, 12:09 AM
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DmaxMaverick DmaxMaverick is offline
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gdblake

Mobil 1 is a high quality lube and should work well with no worries. This, of course, is my opinion. I have not conducted any testing of Mobil 1 gear lube. The additives refered to with most synthetics is not the same as is needed to add to dino oil in a limited slip application.
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  #16  
Old 04-21-2002, 07:04 AM
gdblake gdblake is offline
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Thanks so much, DmaxMaverick--I've really been hangin', hoping for an answer. Anxious to change the diff. Appreciate your response. Had a call into Mobil, but they were closed for the weekend. Best regards!
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  #17  
Old 04-21-2002, 07:44 AM
Allison Jettester Allison Jettester is offline
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DmaxMaverick,

I've been in Rota, Spain for the past few weeks and didn't see your post answering my post above. I had the mind set that the whole question and answer page on the Eaton website I quoted referred to the G80 Locker. They changed the subject to limited-slip and I didn't catch it (I should have since that is the kind of thing I always look for when reviewing government specs!).
Thanks for straightening me out. That's one thing good about this forum--if you are in error, someone with sharp eyes will catch it.

Anyway, you are correct (as far as I know) that any GL-5 rated synthetic gear oil should be ok in the G80 Eaton's "Gov-Loc" LOCKER. Now that I have bought both Redline (with additive) and Mobil 1 I am going to have to make a decision on which to use.

Also, I did jack up the rear and there was a LOT of friction in the rear when I turned one wheel. I could hear a lot of noise coming from it. I do believe the opposing wheel did turn in the opposite direction like an open diff, but am going to do this again to be sure.

Thanks again,
Joe
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  #18  
Old 01-07-2003, 10:40 PM
DonG DonG is offline
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TTT
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  #19  
Old 01-07-2003, 11:07 PM
wangotango wangotango is offline
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Am using Almasol 607 from Lube Engineers Inc in a Mag-Hytec rear-end cover.

Towin' like a mutha. No heat/wheel drive issues.

w/t
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  #20  
Old 04-02-2004, 09:06 PM
wxmn6 wxmn6 is offline
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Two different fluid to choose from: 75w-90 & 75w-140. Can someone please explain the difference, what each number represent? I'm not too familar with how the fluids are rated. Thanks.
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