What is the difference between dana 70 and 80

If you can find a used axle with the right ratio, that saves you some money. Ring gear diameter is a pretty good indicator of overall axle strength and durability. So the bigger the ring gear, the stronger the axle generally speaking. Both the the full-float 14 bolt axle and the Dana 70 have a The Dana 60 ring gear is 9. Because they have larger ring gears, the pinion on bolt full float axles and Dana 70s is less likely to be damaged than the pinion on a Dana 60 or bolt semi-float.

This is important for off-roading, where people are typically using a 2 speed transfer case. The low range of the transfer case multiplies the torque that the differential must handle. The diff can see very high amounts of torque, especially when rock crawling. The typical 14 bolt axle weighs about pounds. However, a rear Dana 60 axle usually weighs about pounds, a front Dana 60 will weigh about lbs, and the Dana 70 is similar in weight to the 14 bolt. The 14 bolt axle and the Dana 70 weigh more partly because they have 3.

This helps the tubes resist bending when side loaded by large tires. The 14 bolt and Dana 70 also have larger axle shafts, ring and pinion gears, and brakes than the 60, which helps to account for the difference in weight. While a lb difference in axle weight might not seem like much, it can have a pretty big impact on vehicle ride and handling.

The lighter the axle, the better the ride generally. The drums are very heavy on vehicles with these big, beefy axles.

The 14 bolt axle has one key advantage vs the Dana 60 or The 14 bolt has a pinion support bearing in addition to the conventional pinion bearing. The pinion support bearing supports the rear end of the pinion gear shaft. The extra support keeps the pinion from deflecting sideways under high torque.

By contrast, Dana 60 and 70 diffs only have the conventional pinion bearing that supports the middle of the pinion shaft. The diameter of the axle shaft at the splines is a key factor in determining how much load the axle can take:. While a. NOTE: You may be surprised at how high those torque ratings are as compared to the torque your engine puts out. OEM transfer cases typically have low range gear ratios running between 2 and 4 to 1.

I read that the 6. It also had 4. Good info I stumbled across a Dana 70 out of a 07 diesel Chevy van with a 12 bolt cover Trying to figure out which variation it is? Tag says 70s? It has open diff gears and disc breaks Thoughts of it for future project. Nightcrawler4x4 New Member. Super 70 made in Columbia Mo no limited slip. It has the bigger cover like a Dana Nightcrawler4x4 said:. Click to expand As far as gears same gear break with carrier.

When my buddy and I did a Jana 76 years ago this was the gear set we used. Welded the carrier into a spool and used stock gears cause that is what fell of the line at the Dana factory were a buddy of ours works.

At the time Carl Janz was not familiar with the 70S he sent me the kit he had at the time we made it work but everything was offset almost all the way to one side of the 60 housing. There maybe more info out there now but we assumed it had its own offset. Farmbred diesel New Member. I am looking for some info on the axle in my truck looking to change it from 3. Farmbred diesel said:. VegasXJChris said:.

A 70u to my knowledge has a nice super smooth bottom? Any of the Depending on your torque output? You must log in or register to reply here. May not ship to Germany - Read item description or contact seller for shipping options.

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