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10-11-2006, 02:39 PM | #1 |
Everything is work in progress
Join Date: Apr 2006
Location: Denver Colorado
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Dana 44 swap/gearing help
Ok guys maybe this is an easy one. My 80 GMC 3/4 ton dana 44 has a bad housing. I picked up a dana 44 out of 3/4 ton 75 Chevy to swap out with. My 80 comes with a 4:56 ratio, the 75 has a 4:55 in it. My corp 14 rear has a 4:56 in it. I'm I dreamin to use the 4:55 and just slide the assembly under my springs and be driven in an afternoon? Or do I have to swap my guts to the 75 housing. Or do I have to find a 4:56 ratio that fits the 75 diff?
Any insight would be greatly helpful Last edited by cobinder; 10-11-2006 at 02:40 PM. |
10-11-2006, 06:04 PM | #2 |
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Location: Binghamton, NY
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Re: Dana 44 swap/gearing help
Those are the same gears. Your allowed 2% difference between front and rear. If the donor axle has 4.56s put it in and run it.
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10-11-2006, 07:58 PM | #3 |
Everything is work in progress
Join Date: Apr 2006
Location: Denver Colorado
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Re: Dana 44 swap/gearing help
How the heck do they change the ratio .01 without a completely different gearing combo? Or maybe they just rounded off LOL
thanks 454 |
10-11-2006, 11:31 PM | #4 |
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Location: vacaville ca, because it as far from indy as i can be
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Re: Dana 44 swap/gearing help
are you sure its even a d44 in a 80? not unless some one put it there.
you are fine with the .01 off ratio, especialy being slightly faster in the front, it helps turning and whips the front around mudding. |
10-11-2006, 11:58 PM | #5 |
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Join Date: Mar 2003
Location: Colfax-California
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Re: Dana 44 swap/gearing help
Factory 1980 will be a corp 10 bolt in the front
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10-12-2006, 12:09 AM | #6 |
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Location: vacaville ca, because it as far from indy as i can be
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Re: Dana 44 swap/gearing help
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10-12-2006, 11:22 AM | #7 |
Everything is work in progress
Join Date: Apr 2006
Location: Denver Colorado
Posts: 326
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Re: Dana 44 swap/gearing help
I looked up the Bill of materials # off my 80 axle on the Dana website and it confirms it is a 44.
These two axles look the same except the donor has the spicer 44 big ole hubs. FYI Dana's site is pretty informitive. www2.dana.com/expert Time to cleaning and unboltin thanks for the input Last edited by cobinder; 10-12-2006 at 11:30 AM. |
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