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Old Yesterday, 12:57 PM   #1
CG
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Rear axle offset question

I was looking at the axle on my old 71 big block 157 in wheel base DRW C30 comparing it to a standard 3/4 ton axle. What is the reason the one ton center section isnt centered on axle meaning one axle side is longer than the other. Looking at the 3/4 ton the center section is centered on the assembly like all 3/4 and half ton Chevy trucks I have looked at.
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Old Yesterday, 01:57 PM   #2
RustyPile
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Re: Rear axle offset question

The driveshaft and pinion gear of most differentials are centered.. This puts the ring gear offset to one side, making one axle longer than the other.. I can't see your C/10 from here but I can see my '71.. It's not centered...
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Old Yesterday, 03:01 PM   #3
CG
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Re: Rear axle offset question

I just assumed on the 3/4 ton the axles were the same on each side. I’ve never taken a rear end apart, beyond my capability. After reading your post I sort of understand a bit better. Still unsure why the one ton is so much different.

Couple pics, one ton axel is nice and clean, 3/4 ton is “weedy”
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Last edited by CG; Yesterday at 03:14 PM. Reason: Still trying to figure it out in my pea brain
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Old Yesterday, 10:16 PM   #4
57taskforce
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Re: Rear axle offset question

The HO52/72 from your 1 ton are off set like that. The dana 60 in your 3/4 ton is centered. Just a difference in axle designs. Also noteworthy here in my observation, most 3/4 ton Chevy’s got the Ho52, and GMC’s seem to have gotten more of the dana 60’s but this isn’t cut and dry.
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Old Today, 12:29 AM   #5
CG
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Re: Rear axle offset question

Any idea on why it was designed with the offset?

I believe the 3/4 ton started life as a 72 Cheyenne Super that I sold the guy that owns it now. He parted it and this is all that’s left
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