I was just wandering what you guys thought about this. Me and a buddy have been debating on which is stronger an old full floating 14bolt from a chevy or a dana 80. He is set on the 14bolt being stronger.

 

Based on what I've heard and read about danas, I'm set on him needing his head examined.

 

Based on what I know the GM 14 Bolt has a 10.5" ring gear and a Dana 80 is 11.25", The Dana 70 is has a 10.5" ring gear. In my opinion that means a 14 Bolt is the equivilant of a Dana 70.

A Dana 80 is definately stronger. but I could be wrong.

 

14 bolt has 10.5" ring gear, 1.5" diameter 30 spline axles.

Dana 80 has 11" ring gear, 1.5" diameter 35 spline axles

Advantage: Dana


Edit: The pinion shaft diameter difference is huge-the 14 bolt has a 1.75" pinion shaft, and the dana 80 has a 2" shaft. That's a **** big difference.

 

i have both, and ive been in both extensively (dana 80 in my dodge and the full floter corporation in my '57) the dana 80 is by far larger and heavier built. my grandpa have acually overloaded a 1 ton with gravel to the extent of bending the housing so much that the outside dual wouldnt touch the ground. at all. i have never seen a dana 80 bend like that. the dana 70 is even larger than the full floter

 

Thanks guys that what i thought. The argument was he wandered why all the etremely high horsepower gas pulling trucks are running the 14. I thought maybe because it has more parts offered.

 

probley because the 14 bolt is one of the strongest rear ends that chevy made. i reckon that would be a good reason to run them.

 

well, as has been said, the dana 70 & 14 bolt sare about the same. Each has it's own strength's, but overall, they are roughly the same.

the dana 80 is bigger, and stronger, but the 14 bolt most likely has a better selection of gears, which, along with the fact that it is a chevy rear, may be why they are running it.

 

Different motorsports require different strengths. A good example is the Ford 9". Its the most common rear end for circle track and drag racing. But put it in an off road 4x4, and I have seen many grenade.

With that said, the 80 is far stronger in all aspects (weight carrying and power handling). The 70 is also stronger, but of course not by as much as an '80. From what I have seen, I would say that a 14 bolt is somewhere between a Dana 60 and 70.

Jim

 

i am not sure exactly what you meant by that,because i didnt state what the rearends were in , but i guess i should have stated that he thought that because they are in the fords,and dodges.mmmmkkk

 

Look-up lockers for a 14 bolt compared to a dana 80, and you'll see why they are using them. I know that if I ever get my stepdad's 77 dodge M880 powerwagon a 14bolt is going to go under the rear of it for truck pulling, and built so it can handle some power

Also, you can regularly buy 14 bolts from $100-200 all day long

 

thats true. i got me a whole truck with a good 4 speed tranny, good front axel and a good rear axel for 400 bucks. They are cheap and theres lots of them. also, i would think that gears would be easier to get/change in the 14 bolt
and i bought a dana 80 a few months back because the one under my dodge was bent. that cost me $1500.

 

These guys are right to compare the GM 14 bolt to the D70....they are very similar in size and strength in all aspects.....the D80 is really the next size up in all aspects.....it isn't just the ring gear - virtually every other component is larger and stronger as it does have a much heavier weight rating than a D70 GM 14 bolt. They are not comparable. FWIW, neither Dodge or Ford use a GM 14 bolt axle. While AAM does make the 14 bolt GM units, there are many subtle differences compared to the AAM's that are in the 3rd gen Dodges.....AAM builds the axles to each company's specs.

 

Well thats what i thought i have had many of the 14 bolts back when i used to run old lifted chevys, and while i never blew one out i never had the power too. I thought it was a real good axle but me and a buddy was in a dispute over this for awhile. Thanks alot for the info.

I knew AAM 3rd gen dodge axles were different in many ways from the 14bolt ect, but why exactly did dodge quite using dana? Just to many problems with the company?