12 bolt vs Dana 60

[Mark Yacavone]

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 ;-)

[SSDiv6]

Originally Posted by Mark Yacavone

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 ;-)

...or a 7.17 ratio...

[Dragsinger]

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

[340Cuda]

Isn't the 12 bolt about the only rear end that is more efficient than a Dana 60?

[BRETV]

Originally Posted by 340Cuda

Isn't the 12 bolt about the only rear end that is more efficient than a Dana 60?

8.8 Fords are like 12 bolts very efficient. I ran an 8.8 with 5.71's weighing 3100, trans brake,10.60's no problem.




Bret Velde
2003 ??/SA

its a couple of dollars, but an aluminum spool, gun drilled lightweight axles, and if you dare ceramic bearings i think the Dana will be just as fast as the 12 bolt and not have the gear trouble either, + 6.50 and a 7.17 option is nice as well. it will also last forever. you already have it in the car as well

[Myron Piatek]

If you're still wanting to try the 12 bolt, perhaps Charlie Boyles could offer some advice and what to expect with a 12 bolt.

http://www.competitionplus.com/drag-...a-legend-lives

[Dwight Southerland]

Hypoid angle for a Dana 60 is less than a 12 bolt. Several years ago, Car Craft did a side-by-side comparison of a 12-bolt, a Dana 60 and a 9-inch. The 9-inch was the loser. No clear winner between the 12-bolt and the Dana.

[Tom Meyer]

I have run a 12 bolt in my Chevy II forever, steel spool reg axles 6.14 gear. 283 SS car with brake 6000 + . Used good gear oil and had very few problems putting hundreds of runs on the gears. Only if I was looking for saving weight would I switch. There is a difference in sprung and unsprung weight that may pick the car up. Unless you get the 12 bolt stuff cheep money might be better on other go fast parts. Way back in the day Rick Johnson ran a 12 bolt in his hemi car. Tom

[Bench Racer]

Originally Posted by SSDiv6

...or a 7.17 ratio...

My Brother ran a Dana with 6:83 and a 2:75 low gear in IHRA Production with a 283c.i. 1958 wagon . The car was a tank at #3839 and low gear was a short ride lol, he shifted at 10,500 rpm. Never broke a gear in the Dana.