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- - Axle Swap Heavy Half (https://67-72chevytrucks.com/vboard/showthread.php?t=834424)

Foot Stomper

05-12-2022 11:15 PM

Axle Swap Heavy Half

1 Attachment(s)

So my dad swapped out the rear axle in the family 59 with a 1980ish Heavy Half rear axle to get a higher gear ratio.
It fit very well and he swapped out the 5 bolt axles with 4x4 6 bolt axles to keep the original 6 bolt rims. (It's only about an 1 1/2" wider than the original.)
Can anyone tell me what the 6 bolt axles would be from?
I need a speedy sleeve and want to get the right one.

kwmech

05-13-2022 12:21 AM

Re: Axle Swap Heavy Half

How many bolts on the rear diff cover?

Foot Stomper

05-13-2022 11:00 AM

Re: Axle Swap Heavy Half

Quote:

Originally Posted by kwmech (Post 9078482)

how many bolts on the rear diff cover?

kwmech

05-13-2022 11:09 AM

Re: Axle Swap Heavy Half

I don't think there any variations in size with the 12b axle-----not like the later model 10b or 14b. Try an application like a 75 K10. OR you can pull the rear diff cover and get a date off of the ring gear

SCOTI

05-13-2022 11:15 AM

Re: Axle Swap Heavy Half

Anything 73-80 truck or Blazer 4x4 would be my starting reference point for a parts search.

LT7A	05-14-2022 09:52 AM

Re: Axle Swap Heavy Half

That family 59 is a neat truck!

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