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04-16-2023, 03:42 PM
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#1 |
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Puzzle Solver
 
Join Date: Mar 2022
Location: Santee CA
Posts: 65
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Rear Diff I.D.
Can someone please tell me what differential I have? I believe it's from a '79 Blazer 4x4. It appears to be open, by the way it can move one wheel without the other, and what looks like a bar across the middle. Gears are 41/11 (3.73).
What is the strange little device inside? It's some kind of moving weight, like you'd find in a mechanical distributor advance. I've never seen anything like it, and web search hasn't turned anything up. I'm thinking of changing to a limited slip, due to the wear marks on the carrier from bad adjustment, and some evidence of corrosion on the teeth. If this is no big deal, can I reset the pinion and lash and continue to use it safely? Thanks!
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Toby '59 Stepside w/ '55 front clip, on '79 Blazer 4x4 with '02 Vortec 6.0 and 4L60E '66 Corvair Mid-engine EFI 350 My truck build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=832276 |
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04-16-2023, 03:48 PM
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#2 |
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Registered User
Join Date: Jan 2003
Location: Safford,AZ
Posts: 3,621
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Re: Rear Diff I.D.
12 bolt with a Torsen gov-lock
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1969  307, t3501950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT |
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04-16-2023, 03:56 PM
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#3 |
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Puzzle Solver
Join Date: Mar 2022
Location: Santee CA
Posts: 65
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Re: Rear Diff I.D.
A friend just sent me a link to Eaton Gov Lock. Looks like that's what this is! Still the question, is it suitable for continued use with proper adjustment?
Thanks
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Toby '59 Stepside w/ '55 front clip, on '79 Blazer 4x4 with '02 Vortec 6.0 and 4L60E '66 Corvair Mid-engine EFI 350 My truck build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=832276 |
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04-16-2023, 03:58 PM
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#4 |
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Puzzle Solver
Join Date: Mar 2022
Location: Santee CA
Posts: 65
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Re: Rear Diff I.D.
Thanks for the quick reply, Warrens69GMC. Are the Torsen and Eaton the same part?
__________________
Toby '59 Stepside w/ '55 front clip, on '79 Blazer 4x4 with '02 Vortec 6.0 and 4L60E '66 Corvair Mid-engine EFI 350 My truck build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=832276 |
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04-16-2023, 03:59 PM
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#5 |
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Registered User
Join Date: Jan 2003
Location: Safford,AZ
Posts: 3,621
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Re: Rear Diff I.D.
You might want a rear end expert to make that decision. When I see wear on the carrier, I usually look for another rear or have mine revuilt.
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1969 307, t3501950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT |
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04-16-2023, 06:46 PM
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#6 |
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Post Whore
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: Rear Diff I.D.
That looks bad.. pinion been rubbing the carrier..
On the govlock it can be several things that keep it from working.. worn clutch discs and broken teeth on the engagement gears are what I've seen
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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04-16-2023, 07:59 PM
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#7 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,628
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Re: Rear Diff I.D.
The gov-locs at this point are old tech. Every one of those I rebuild I talk the customer into a Tru-trac and never look back. Everybody has been happy with the change over.
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