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Old 09-08-2010, 08:42 PM   #1
BB72CHEVKT
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Driveshaft?

I am swapping the Dana 6 lug in my 69 1/2 ton with a 71 12 bolt 5 lug.Will I have to lenghten or shorten the driveshaft?
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Old 09-09-2010, 02:25 PM   #2
Longhorn Man
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Re: Driveshaft?

you may have length issues, and you may have U joint size issues too. I would try to get the rear shaft out of a 12 bolt equipped truck
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Old 09-09-2010, 05:31 PM   #3
BB72CHEVKT
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Re: Driveshaft?

Quote:
Originally Posted by Longhorn Man View Post
you may have length issues, and you may have U joint size issues too. I would try to get the rear shaft out of a 12 bolt equipped truck
Thanks LM. What sucks is I went to a one piece shaft when I got the truck. So I may have to have it resized and retro fit to handle the u-joint that the 12 bolt accepts. Do all 71-72 5 lug rear ends take the same size u-joint.

I had my 72 3/4ton towed to the shop for its rear end troubles today in hopes it could be repaired vs swapped. The shopped called and said I need a replacement rear end that the one in the truck is beyond rebulding. I know the pin that holds the spider gears in sheared off but could that trash the whole rear en?.
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Old 09-10-2010, 08:17 AM   #4
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Re: Driveshaft?

Anbody done this mod?
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Old 09-13-2010, 06:58 PM   #5
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Re: Driveshaft?

The 5 lug rear end is almost buttoned up. The driveshaft lined up just needed a different ujoint.
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