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Old 05-22-2007, 04:27 PM   #1 (permalink)
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Question Gov-Lock Rebuild

Hi, Does anyone have any information on rebuilding a gov-lock (Eaton G80 or mechanical locking differential)?

I know of their shortcomings, but I am putting one in a light passenger car and hope for better success with it than many people have with them in their trucks. First I need to tear it down and clean it before I stab it in, though.

If anyone has a factory service manual that details this and could scan the pages in I would greatly appreciate it!

Thanks, Chris
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Old 05-22-2007, 04:38 PM   #2 (permalink)
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GM Parts only!!
I looked at rebuilding a gov loc 5 years ago the parts were over $350.

an auburn posi is that much.

Plus you need gm service tools to get the pins out
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Old 05-22-2007, 04:46 PM   #3 (permalink)
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I don't doubt that for the parts to rebuild but I'm thinking I will be able to get away with a disassembly, cleaning, and reassembly. Do you have any literature about the process or pictures of the specialty tools by any chance? Thanks, Chris
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Old 05-22-2007, 05:00 PM   #4 (permalink)
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I rebuilt mine. With a Lincoln Weld Pack 175HD
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Old 05-22-2007, 05:20 PM   #5 (permalink)
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I would soak it in a pool of gasoline for a night.
Then spary the hell out of it with some break cleaner.
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Old 05-22-2007, 05:43 PM   #6 (permalink)
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Id Install the gov lock into this



Seriously though I broke two spider gears on mine and the dealer wanted 300 something per gear

I ended up getting an open carrier and detroit.


I do however have a factory service manual but no scanner perhaps i could fax them to you?
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Old 05-22-2007, 05:53 PM   #7 (permalink)
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I knew I would get ridicule for this! I appreciate all the advice and warnings about this thing but like I said this is going into a 3000 pound car with 27" tall narrow tires. I am just gonna give it a shot and hope it works OK.

As for faxing the manual pages, I would love that but I have no access to a fax machine currently (unemployed). Thanks very much for the offer and I am going to try to find a fax number I can use.
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Old 05-22-2007, 06:03 PM   #8 (permalink)
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Go to your local GM dealer and ask the parts guy
If they have ben around awhile they should have it
Doesnt mean they will let you borrow it But you may be able to see it and fab something up.
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Old 05-22-2007, 06:31 PM   #9 (permalink)
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I've tried at a local dealership and gotten nowhere. I will try others and the same one again if there isn't someone on the board that has the info. It really all depends on who you are lucky enough to talk to. Good suggestion though.
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Old 05-22-2007, 10:31 PM   #10 (permalink)
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Quote:
Originally Posted by widmayer123 View Post
GM Parts only!!
I looked at rebuilding a gov loc 5 years ago the parts were over $350.
an auburn posi is that much.
Plus you need gm service tools to get the pins out
Agreed, the cost of the parts and tools will net you a new posi.
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Old 05-22-2007, 10:38 PM   #11 (permalink)
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Well let me know if i need to get the needed pages copied and faxed m-f 9-5 i can get it done
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Old 06-02-2007, 11:04 AM   #12 (permalink)
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Thumbs up

I finally got a fax number I can use. I will PM you with the number and if you could fax the pages I would really appreciate it. The unit I am dealing with is from an 8.5" 10 bolt from the mid 80's if you have a choice of what to look up. If not I'm sure they are all pretty similar and any info should be all I need.

Thanks a ton!
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Old 06-03-2007, 04:48 PM   #13 (permalink)
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The gov-bomb is not really worth rebuilding, if it's shot (or in pieces, usually) replace it with a good LSD or Locker. I've got the GM FSM for the gov-bomb. I'll scan for you.
I need to resize them, though.

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Old 06-03-2007, 04:59 PM   #14 (permalink)
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You do need a special tool to remove the governor bushings, I made one from a C-clamp.

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Old 06-03-2007, 06:04 PM   #15 (permalink)
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Old 06-03-2007, 06:06 PM   #16 (permalink)
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I think for a daily driver CAR, the G80 is FINE. They work excellent in the snow. Plus if it's a G80 diff, you won't have to setup the diff. Just R&R. No effing around with shims or dial indicators or checking the gear pattern.

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