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Old 04-29-2013, 06:20 PM   #1
Mr_B
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What differential do I have

Hello all,
I have a mistery on my hands that no one seems to be able to solve.
So, I thought I'd try here. I appreciate any info.

Thanks

The Truck: 1963 GMC C1000
Differential cover: 10 Bolt (3 inches from bottom bolt to next bolt in line)
Gear Ratio: 3.90:1
Ring gear dia: around 9" (little rough measuring with a tape measure)

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Last edited by Mr_B; 04-29-2013 at 06:43 PM. Reason: mispelling
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Old 04-29-2013, 06:54 PM   #2
Rich 5150 69
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Re: What differential do I have

Top right hand side of axle housing will have series of letters / numbers, that will tell us what it is......
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Old 04-29-2013, 08:35 PM   #3
64tantruck
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Re: What differential do I have

Rear diff cover looks like a Dana 35 rear end. Thats what our 61 has in it.

Glenn
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64 C20 350ci Turbo 350 tranny 3.73 gear with air ride.
61 Apache10 (wife's truck) 327ci powerglide.

http://67-72chevytrucks.com/vboard/s...d.php?t=570100
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Old 04-29-2013, 08:54 PM   #4
j.kirn
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Re: What differential do I have

eaton h032
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Old 04-29-2013, 08:56 PM   #5
64tantruck
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Re: What differential do I have

Ok, does anyone know if the square plug
Can be removed to fill/check the rear did
Gear oil?
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Glenn Korec
Jamesville NY
64 C20 350ci Turbo 350 tranny 3.73 gear with air ride.
61 Apache10 (wife's truck) 327ci powerglide.

http://67-72chevytrucks.com/vboard/s...d.php?t=570100
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Old 04-30-2013, 01:03 AM   #6
Captainfab
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Re: What differential do I have

Yes that rear plug is where you fill the differential with gear oil. The bottom of the fill hole is the proper level. And I agree with j.kirn, that is an Eaton HO32 differential.
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Old 04-30-2013, 08:12 AM   #7
64tantruck
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Re: What differential do I have

Thanks Capt Fab. Looking his pics I see some differences. Ours has studs with nuts to hold the cover on. His has botls. Thanks for the info on the plug to fill the level. I have tried removing our plug with no luck. Its most likely been on since 61.

Glenn
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Glenn Korec
Jamesville NY
64 C20 350ci Turbo 350 tranny 3.73 gear with air ride.
61 Apache10 (wife's truck) 327ci powerglide.

http://67-72chevytrucks.com/vboard/s...d.php?t=570100
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Old 05-02-2013, 06:41 PM   #8
Mr_B
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Re: What differential do I have

Thanks a bunch. I now have a good idea where my options are.
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