Are these dana 70s? Are they single wheel rears and what was the ratio, I think I have read 6.17 or 7.17. What is top speed with that gear and stock size tire, through a 727?

 

7.17 and IIRC someone here stated about 35mph...

 

the rpm's will be ok if you run a 52" Michelin tire.

 

D70 with 7.17 gears TF727 transmission means top speed would be around 20mph or so.

 

7.17 gearing

dana 70 rear

detroit locker

3 inch brake shoes

top speed 33mph with throttle lever adjusted for maximum throttle

top speed 43 with 3200 spring

 

iirc they are drw width also

 

With low gears like that, could wheel in 3rd and 4th gear hi range and still have a crawl ratio of 100:1

 

I think the only thing that rear would be useful in is a 2WD pullin truck with a 5000 rpm p pump motor in it. they did have pretty awesome lockers in them.

where would you find a 7.17 gear set at for a front dana 60??? nowhere id supposed

 

http://www.ringpinion.com/ProductDet...px?ProdID=3762

 

Is that axle capable of accepting a swap down to 4.10 or so? Doubtful, I suppose, thought I'd ask. The ring would be pretty small, as opposed to 3.07 having a large ring.

 

The pinion is the main change from ratio to ratio. Ring gear stays basically the same size. Thats why the carrier's are different from low ratio's to high. They move the ring gear closer or further from the pinion centerline. The thickness of the ring will vary some, I bet the 7.17 has a perty thick one.

Should be able to buy a 4.10 and numerically lower carrier and be good to go.


Just my .02$