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07-25-2020, 10:02 PM | #1 |
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12 bolt vs Dana 60
Been thinking about taking very heavy dana out and replacing with 12 bolt. Its known the Dana is bullet proof and takes more energy to rotate than 12 bolt. Car is a 283 ss/gt auto in 3430lb wagon with a 6:20 gear and 30" radial tire. There was a 12 bolt with 6:14 and 28.5" bias tire dad ran in the car in the 80's before rules changed on heads. Besides more hp to run dana, I'm looking at the difference in weight. With dana, I'm pretty much locked into one gt class due to not getting light enough. Would the oem 12 bolt hold up or do I need to think more about an aftermarket housing and is a good 6:14 still available? Thanks.
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07-25-2020, 10:51 PM | #2 |
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Re: 12 bolt vs Dana 60
12 bolt with aftermarket goods will hold up. I'm 3360 10 flat ET with trans brake and around 170 passes. No noise yet. Did break a 4.56 street gear. Went pro gear and that's been it. Also used 4.10 gear with 9 tooth pinion and no problem. If I remember I think 85 lbs lighter then dana
Last edited by Jeff Stout; 07-25-2020 at 10:53 PM. Reason: More |
07-25-2020, 11:46 PM | #3 |
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Re: 12 bolt vs Dana 60
I wouldn't carry a Dana 60 , unless it was for the 6.50 ratio.
Come to think of it, there's your real answer ;-)
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07-26-2020, 12:36 AM | #4 |
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Re: 12 bolt vs Dana 60
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07-26-2020, 01:08 AM | #5 |
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Re: 12 bolt vs Dana 60
with the ratios of 5.86 - 6.14 the 12 bolt pinion is very small. It may have been an isolated case but with the 5.86 in my Super 10 it did not hold up. Even with a Cryo treated gear set. Installing a 5.57 gear gained one more tooth on the pinion and gear life was much better. This was with a SS 327 running 10.30s at 8400 - 8600 RPM at around 3250 pounds
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07-26-2020, 10:29 AM | #6 |
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Re: 12 bolt vs Dana 60
Isn't the 12 bolt about the only rear end that is more efficient than a Dana 60?
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07-26-2020, 02:23 PM | #7 | |
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Re: 12 bolt vs Dana 60
Quote:
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07-26-2020, 03:08 PM | #8 |
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Re: 12 bolt vs Dana 60
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07-26-2020, 04:37 PM | #9 | |
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Re: 12 bolt vs Dana 60
Quote:
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07-26-2020, 06:50 PM | #10 |
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Re: 12 bolt vs Dana 60
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