Dealer gives me a GM part # for the rear end oil of 89021678 says its full synthetic 75W-90 and retail is $16.95 Canadian $'s per liter. Is this the same as the grape juice aka "holy water"?


In the book it says 10953455.


These are apparently Canadian part #'s. Big difference in price for approx the same amount.


I need to change the rear, http://www.dieselplace.com/forum/smileys/Confused.gif





Thanks


Rob

I use Mobil synthetic in the rear end about $7.00 per quart





2004 GMC 2500HD Ext. Cab, Long Box ,Duramax (LB7)/Allison; GMC bed liner;Air Lift Super Duty air bags; Michelin LT265/75-R16 LTX M/S ;Luverne Running boards; Bilstein shocks; Delvac 1300; Isspro gauges.Edited by: Norskeole

I also use M1. It's equal to, or better then, the GM stuff. And it's a LOT cheaper.

Ok here's a new twist to this,


General motors tells me that the US part # 12378261, equiv Canadian part # is 10953455.


This Canadian part # is now changed to 89021678 and there is a revised price at $16.95 per liter. This is of course Canadian dollars.


If this is fact then the price of "grape juice" has gone down quite a bit. Can any one confirm any of this info????


Yes I can use M1, or Ams, but if I should have any warrenty issues you know who they are going to point the finger at. I'll wait till I get a few miles in before switching.





Rob

They cannot void warranty, or anything else for that matter, because you chose to use Mobil as long as it is ceritifed, and it is.

The book says or equivilent I do believe. They cant screw you on warrantee unless they prove what you did or didnt do caused the problem.

I hear ya, however,....


The General specifies that it must meet GM specification 9986115.


And that is where they can get ya,


I really doubt they would get that picky, but they have you over a barrel.





Rob

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I changed mine around 11,000 miles and put in Valvoline syn. 75-90W. I read on here to use the stuff GM sells and Monday they wanted over $25.00 a bottle I told them NO WAY !!!! I may change it again but no with GM grape juice.


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Changed my rear diff fluid today, Truck has 3000 miles on it and 500 miles towing. I removed 2 1/2 qts from rear end and only put back 3 3/4 back in (GM grape juice)

Doesn't the used grape juice smell lovely?!http://www.dieselplace.com/forum/smileys/HiHi.gif Wife has never complained about the smell of diesel on me, but she couldn't stand the used juice smell, and I had alread washed my hands three times trying to get rid of the smell!

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I changed mine around 11,000 miles and put in Valvoline syn. 75-90W. I read on here to use the stuff GM sells and Monday they wanted over $25.00 a bottle I told them NO WAY !!!! I may change it again but no with GM grape juice.


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I have been running Valvoline for 20K miles without issue.


GL5 rated and a lot cheaper then GM's Grape Juice.


Thttp://www.dieselplace.com/forum/smileys/Clown.gifNY