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M1009 Rear Chunk Gear Replacement

kingsley

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Guys need some help....

Upon inspection of the rear chunk, I found one of the spider gears is missing a tooth. Does anyone have any suggestion of where I can pick up the parts? The local GM shop is searching.

thanks for the help.


Kingsley
 

builder77

In Memorial
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"chunk" does not mean anything when it comes to vehicles. Cheese or chocolate maybe, but not trucks.

If you are talking about the read axle then I would check ebay or go to your local pull-it-yourself junkyard. GM 10-bolts are very common GM vehicles. Aother option is checking out govliquidation as they are selling off many of these axles. I bought two new in the crate for $50 each two weeks ago. Recently they are being sold out of the Norfolk, Va. location. They still have a couple left from abandoned lots and such. Shipping would be your only real cost.
 

kingsley

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the term "chunk"

Acutally I hate to differ with you....the term chunk is commonly used in our racing circuit to refer to the rear diff. Let's try not to highlight our ignorance.

I am not looking for a scrap yard special, rather a good OEM reseller.
 

builder77

In Memorial
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RE: the term "chunk"

I don't know about OEM other then you local or online GM dealer. Aftermarket replacement I would start at Randy Ring and Pinion (www.ringpinion.com). They have been good to me in the past. On ebay I ran across some new no name spiders for $93, so if it was me I would at least take a look at just replacing it with low cost locker like a Lockright. Here is another aftermarket. http://www.lmctruck.com/icatalog/bzc/0111.html

No ignorance here. I have been into autos since I was young, and even raced cheap vintage for a couple years. I even ran this by two coworkers who are into drag racing. No one ever heard of that term. I would not have know what you were talking about if you had not mentioned spider gears. Chunk must be a local term that is not generally used.
 

doghead

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RE: the term "chunk"

My cousin always uses the term "center chunk". It always catches me funny when I hear him say it, but apparently it is a commonly used term for the differential.
 

ida34

Well-known member
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Dexter, MI
I understood chunk. I don't use it. I have also heard pumpkin. I have worked as a professional mechanic before but changed professions. If it is regional it must have made it to Michigan. I also have been around racing since the 70's. I had a step father that raced. I can't remember the last time I have heard the term chunk but it has been a while.

That being said, the problem you will find with the dealerships is that of dealing with the Govlock unit. It is only oem for the military blazers. I doubt the spider gears are the same as the open diffs. If they are the same, check LMC truck. They have the gears individually or as a set.
 
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