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Aftermarket differential parts found on my 2000 Chevy Suburban


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TreyGT
New User

Apr 15, 2013, 9:39 AM

Post #1 of 6 (1824 views)
Aftermarket differential parts found on my 2000 Chevy Suburban Sign In

I recently had to have the rear end of the 2000 Chevy Suburban 1500 rebuilt (192K miles). When the mechanic pulled off the old one, he noticed that the differential gears were not marked with GM part numbers. He said that the parts are aftermarket parts. However, I bought the car new in 2000 and have never had any work done on the rear end. Is it true that OEM GM parts will always have the GM part number marked on the part? The Suburban does have 192K miles on it, so not sure I can complain, except that the mechanic said that they usually go longer unless you do heavy towing (which I do not). The only other scenario I can think of is either the truck was damaged before I bought it from the dealer and had work done there, or that GM ran short of parts and substituted parts on the factory line, or that the mechanic is incorrect about parts always being marked with GM part numbers.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 15, 2013, 12:01 PM

Post #2 of 6 (1790 views)
Re: Aftermarket differential parts found on my 2000 Chevy Suburban Sign In

That's a little strange for a drive-line component if true. For ages cars makers have sent out items for bid but I find they come thru with the makers part #s on them. At least GM trucks could be manufactured in US, Canada or perhaps Mexico. IDK what might have happened? If the unit failed before you ever saw it new it should have been GM parts to make it as new.

Tough to figure. Just maybe it got swapped if it was someone's fault not a warranty job before it was ready for sale. Now ages ago a real shifty dealer would take parts off of new cars for same cars off warranty, sell the fix as redone and get the maker to warranty the bad one - total theft of course. Trust me that place isn't in biz.

If your tech can get this right with OE parts at least that much is good. It did last that 192,000 miles so wasn't totally cursed with whatever happened and I do think by now you are SOL with anything from GM at this point.

Again, many parts are farmed out all over but make to makers spec as said. I would bet they would still show a GM part # on at least something like a differential.

It may only solve your curiosity but you might plain call GM and see if in fact they did do that to some?

You may never know at this late date IMO,

T



MarineGrunt
Enthusiast
MarineGrunt profile image

Apr 20, 2013, 10:09 PM

Post #3 of 6 (1752 views)
Re: Aftermarket differential parts found on my 2000 Chevy Suburban Sign In

I know I'm a few days late on this but I heard that GM uses Eaton diffs in some of their rear ends. Eaton mainly sells aftermarket parts. I'm not 100% sure this is true, but if it is, they wouldn't have a GM part numbers. I just replaced my carrier so will look at the old parts tomorrow and see what numbers mine have on it. My old diff is the G80 gov lock.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 21, 2013, 9:30 AM

Post #4 of 6 (1741 views)
Re: Aftermarket differential parts found on my 2000 Chevy Suburban Sign In

Really MG - why would anyone think you knew a thing about this stuff?

Love it, Tom



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 21, 2013, 9:49 AM

Post #5 of 6 (1735 views)
Re: Aftermarket differential parts found on my 2000 Chevy Suburban Sign In

You know MG - I went to full blown college for stuff like this ( degree with awards in auto technology - no crap) and would fail at what you have succeeded at. Never studied. If it's your thing you absorb it. I did.
Messed with my head but not first in a class of ~22, six actually made it - all straight A's so hard to differentiate.

You go guy! You rock and you know we love it...................Put us to work! At least one of us must know something!!
Tom Greenleaf - old and sometimes stupid but if I've lost my mind don't know it! Yikes! That alone is scary!

T



MarineGrunt
Enthusiast
MarineGrunt profile image

Apr 21, 2013, 1:10 PM

Post #6 of 6 (1726 views)
Re: Aftermarket differential parts found on my 2000 Chevy Suburban Sign In

Thanks for the compliment Tom. You know I couldn't, or wouldn't, have attempted or succeeded without the help of all of guys.

This came from Eaton's website...." "The Eaton mechanical locking differentials were the first to be offered as an option to pickup drivers and today it is known around the world simply by the GM option code G80. This automatic unit, available as standard and optional equipment for rear drive and 4-wheel drive vehicles, makes traction problems a thing of the past."

So, if Eaton supplies some diffs to GM I doubt it would be labeled with a GM part number. If the op is still around, look in your glove box on the label and look for the code G80. That would be one supplied by Eaton is a governor locking differential. That's what mine had and it blew to hell. If you search the net you'll see it's somewhat of a common problem. By the way, I have a 2003 Sierra.






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