Chevy 12bolt vs Ford 8.8 - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 09-14-2007
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Chevy 12bolt vs Ford 8.8

Is the 12 bolt Chevy axle any good? reason I am asking is a friend of mine has a 76? blazer that he is putting a 14bolt and D60 under. Sounds like I could get the front and rear originals off of him for cheap, run those knuckles on my ford D44 for high steer and run those calipers/brakes and run 6 lug instead of 5...

I just want to know if the 12 bolt is even worth messing with if not ill just find a full width 8.8 with 5on5.5 like my D44.
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Old 09-14-2007
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I know a few guys who have trucks with them. They seem to have no problems at all. I would say the 12 bolt is stronger than the 8.8.
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Old 09-14-2007
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if its paired with a 60 id say 12bolt stronger
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Old 09-14-2007
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i would almost think it is compareable to a 31 spline 8.8........

but like Evan said, if you can get the brakes and everything to run on the Dana 44, then i would get it....crap you already have the leafs, all you will need to do is weld up some new spring plates for it...
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Old 09-14-2007
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Quote:
Originally Posted by HighRollerII
if its paired with a 60 id say 12bolt stronger
his friend is swapping out his 12 bolt and Dana 44 for a 14 bolt and D60.....
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Old 09-14-2007
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Believe it or not, I would say the 8.8 is stronger. The 12 bolt has many proven years behind it, and its reputation is outstanding, But methinks the Ford 8.8 is stronger.
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Old 09-14-2007
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skip all these 1/2? ton axles and get some 60s


if you want me to i can post this up on Krawltex, they may know a thing or 2...
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Old 09-14-2007
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Quote:
Originally Posted by lifted97ranger
his friend is swapping out his 12 bolt and Dana 44 for a 14 bolt and D60.....

oh i read that wrong..oops
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Old 09-14-2007
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Quote:
Originally Posted by HighRollerII
oh i read that wrong..oops
freekin noobs!

Quote:
Originally Posted by D.
Believe it or not, I would say the 8.8 is stronger. The 12 bolt has many proven years behind it, and its reputation is outstanding, But methinks the Ford 8.8 is stronger.
the 8.8 31 spline is stronger, but if he is going to go with 1/2 ton Chevy high steer knuckles, the 12 Bolt would be better.....that way he wouldn't have to go into a custom rear brake setup.....
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Old 09-14-2007
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The 12-bolt has a weak pinion shaft and carrier, if it was a 12-bolt from a car than it would be alright. Axles are 1.28 in/ 30 spl (1.32 in/ 31 spl), The axle tubes are 3.0 in/ .22-.25 thick (3.25 in/ .180-.250 thick) and both are c-clip.
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Old 09-14-2007
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You should be able to easily find a semi-float 14 bolt which would be much better than a 12 bolt and would still have the 6 lug pattern that Chevys have. They're also pretty cheap. 12 bolts just aren't much good IMO, but I'd say they are comparable to a D44. I chose to scrap the 12 bolt I had in favor of a D44 for the Samurai though.
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Old 09-14-2007
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ok well i think that answers my question. no 12bolt.

what did these 14 bolts with 6 lug come on? Also did the D60 ever come in 6 lug?
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Old 09-14-2007
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Quote:
Originally Posted by lifted97ranger
crap you already have the leafs, all you will need to do is weld up some new spring plates for it...

leaf springs? this full width rear axle wont have leaf springs. coils are the only way.
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Old 09-14-2007
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Quote:
Originally Posted by zabeard
ok well i think that answers my question. no 12bolt.

what did these 14 bolts with 6 lug come on? Also did the D60 ever come in 6 lug?
some '88 1/2 ton x-cabs. maybe 78-79 D60, I'm not real sure
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Old 09-14-2007
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Quote:
Originally Posted by zabeard
leaf springs? this full width rear axle wont have leaf springs. coils are the only way.
yea i forgot .......
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Old 09-18-2007
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my 12bolt in my chevy handles the launches I give it w/ 472hp on tap.
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Old 09-18-2007
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well i am going to go look at it. who knows i might bring it home, just not sure i want to use chevy axles. :)
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Old 09-18-2007
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Axles are fine. But just don't go switching over to a full Chevy powerplant...

But, I hear the Chevy T400's are pretty decent...

Sounds fun. Gonna be more flexy flexy in the rear!
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Old 09-18-2007
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Quote:
Originally Posted by Fx4wannabe01
my 12bolt in my chevy handles the launches I give it w/ 472hp on tap.
I am going to assume that this is a car which would have the stronger 12-bolt, it can be swapped over to the ranger but I am not sure on the WMS
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Old 09-18-2007
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Quote:
Originally Posted by AgPete139
Axles are fine. But just don't go switching over to a full Chevy powerplant...

But, I hear the Chevy T400's are pretty decent...

Sounds fun. Gonna be more flexy flexy in the rear!
LS1/LT1 FTW

The 78-79 ford D60's are not 6 lug, as far as I know no rear 60 came 6 lug. But im sure you could get a 60 and then buy 6 lug rotors and hubs to fit it. There are companies that sell that type of stuff. Friend of mine just built custom 5x5.5 D60's front and rear for his Cherokee.
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Old 09-19-2007
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Zach, best as I can figure for the semifloat 14 bolt is this:

It was used in the rear of 1964-and-later GM pickups, and in the rear of 1984-91 3/4-ton Suburbans.

That would be your best bet I think. A ford 9" would also be a good deal if you decide to stick with 5on5.5 instead of going to 6 lug.
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Old 09-19-2007
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Well a friend of mine has a D60 FF from a Suburban and a 9" so I guess I have a choice from either.

I am going to keep my eye out for a 14 bolt tho. Ive got some time yet.
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  #23  
Old 09-19-2007
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my chevy has a 6 lug 14 bolt they come in heavy half ton trucks they are marked 3/4 ton but are 6 lug its the small 14 bolt (9.5") but ive twisted off two drive shafts and never had a problem with it
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