me and DanglingDave were talking about 70 Vs. 10.25...heres what dave had to say:



so..anyone know how far over the center sectoin is moved? and..will this matter in all reality? anything i can do about it..any other options..etc?

thanks,
Joseph :thumbup

Well, if the proper 70 is like the 60 you need not worry. I think I measured about an inch or so difference D60 to 8.8 pinon offset. However, the 60 has a short pinion snout as well (compared to the 10.25 and maybe 70). Its 13", my 8.8 is 11.5", the 10.25 I measured was 14.5"....IOW...shorter driveshaft and horizontal angularity make it all the worse.

Edit: Joebob, didn't you get a 60 rear with your front purchase? You've got a 5.0, you're planning 4.88 gears, so what tire size are you thinking? If you're not planning on at least 39's, why do you want such a monster? Have you seen one yet?

 

Theres tons of vans in the junk yards. Just go there and measure one

 

Why screw around with a van rearend? D70U's came in early to mid 80's F250's and 350's that are perfect for dropping into a Bronco. I got mine from a 1985 F250.

 

Edit: Joebob, didn't you get a 60 rear with your front purchase? You've got a 5.0, you're planning 4.88 gears, so what tire size are you thinking? If you're not planning on at least 39's, why do you want such a monster? Have you seen one yet?

the guy took the 60 out of the deal, im buying the detroit/4.88's, and Axaviere is buying them from me, since im getting em cheaper than normal because of the "group deal" and he wants to get rid of them

I was hoping the 70 would have a shorter snout, as id really like to have a longer DS...ya never know, i might get lucky and not have to extend/shorten my driveshaft if i got a lil bit longer snout, and with the shackle flip, but that would just be kind of "nice"

I plan on running 37+, when these wear out...my "dream tire" would be the 39x13.5x15R Radial Irok's, but i guess we'll see

I didnt have time right now to measure mike, i wont for a week, just figured id ask to see if anyone had a big issue with running a 70

Why screw around with a van rearend? D70U's came in early to mid 80's F250's and 350's that are perfect for dropping into a Bronco. I got mine from a 1985 F250.

i thought that SF 10.25's came in the mid 80's 3/4-1ton? and..i'd need a VSS model rear axle if possible..trying to stay away from that modication, and getting more strength by going 10.25 (and just recently dave brought up the 70)

i may have found a 10.25 for CHEAP (talking 50 bucks) so this idea may just be scrapped

 

I'm glad I don't have to deal with that VSS thing, I forget so many Broncos need it :twak

IIRC, 1985 was the change over year from the D70 to the Sterling.

 

I think 84 was the first year of the sterling and 83 was the last year of the D70

 

When considering everything, make sure to take into account the availability of lockers for the 70...:shrug

 

I think 84 was the first year of the sterling and 83 was the last year of the D70

Since my D70 is from an 85 and I've seen them in 86's, I'd say those years are off a bit.

 

I think 84 was the first year of the sterling and 83 was the last year of the D70

My 86 duallie has a D70. Its a 2wd crew cab.

 

My dads 84 has the sterling
Also I pulled my first sterling out of an 85 F250

 

You guys know that Ford would use something up before installing the newest thing right? Both my 86's have a C6. Somewhere I read that Ford was already installing 8.8s that year. I sure am glad I got the C6 instead.

 

The pinion offset is not bad, its normally around 3 inches, you will not notice it.
on FSB, the 9 inch pinion is offset about 1-2 inches.
My 9 has a 3.1something offset, I don't notcie it

 

My dads 84 has the sterling
Also I pulled my first sterling out of an 85 F250

does not make it gospel. ford is notorious for using whatever they had laying around at the time.

 

does not make it gospel. ford is notorious for using whatever they had laying around at the time.

That's very true. On top of that there's different factories.

Edit: My '86 dually was supposed to have the d70 according to the 1986 Ford Light Truck Facts Book as was the Chassis Cab. The F250 HD and regular F350 got the Sterling. The "regular" F250 got the Sterling semifloat according to the spec book. Thats consistent with what I've seen. It also lists the Ford Hotchkiss 3750 (3800) for the F150 & Bronco.

 

does not make it gospel. ford is notorious for using whatever they had laying around at the time.

My point exactly :thumbup

 

does not make it gospel. ford is notorious for using whatever they had laying around at the time.

isnt that the truth

 

does not make it gospel. ford is notorious for using whatever they had laying around at the time.

Yeah I know....but the majority of the ones I have seen are that way.

 

You guys know that Ford would use something up before installing the newest thing right? Both my 86's have a C6. Somewhere I read that Ford was already installing 8.8s that year. I sure am glad I got the C6 instead.

what are you taling about? A C6 is a transmition and an 8.8 in an axle...

 

Ford was still puting some D70s in vans in 1990. According to the Ford Spec book for 1990, an E-350 with a rear axle GAWR of 7400 should be a D70 whil 6340 would be D61-1.

Best I can tell, axle codes wold be 52 (4.1), 53 (3.54), E2 (4.1 ls).

 

The most commen D70U is a 84 or early 85 F250HD with a 6.9 or 460 (6300lb) They used them in some 80-83's but not as much as they did in 84-85. In Feb.85 they started using the stering (6250lb) first in Dearborn Assembly plant and then others, just like the Dana 60 fronts in the F350's. The duallys used 70's for a while later. The E350's still use Dana 70's mainly in duallys, but some are still SRW.
And for F150's and Broncos, the 83-86 had a 8.8 with a 4.9 or 5.0 (some stick shift 5.0's did get the 9") all 5.8HO's had a 9" and most 5.82V's also had 9"s.

 

My info is from the FoMoCo spec book 1987 which has the data for the '86. The book says the 86 duallies have the D70 and mine does. As far as the 9" and 8.8 in F150s and Broncos, there was a lot of overlap. None the less, the offcial Ford Light Truck Fact book for 1987 states that Broncos through 1986 were supposed to have Hotchkiss type rears. Its my interpretation that Ford intended the complete transistion to the 8.8 in Broncos in 87 due to the RABS.

On the first page following the Paint chips of my 87 Fact book is this:

The specifications in the book were in effect as of July, 1986 and approved for printing. The Ford Motor Company, whose policy is one of continuous improvement, reserves the right, however, to discontinue models, or change at any time, specifications, design, material or prices without notice and without incurring any obligation.

 

joebob, what are you going do to with the VSS sensor if you go to the d-70? just wondering, coming from a 92-96' guy

good luck bud :beer

 

might try the newer dodge 2500 & 3500 trucks. They have a 70 hybrid (dana 80 outers dana 70 center section) and true dana 80s.

They also have a tone ring that could be used for the e4od :clap

 

might try the newer dodge 2500 & 3500 trucks. They have a 70 hybrid (dana 80 outers dana 70 center section) and true dana 80s.

They also have a tone ring that could be used for the e4od :clap

If its a dually, diesel, or a V10, it will have the true D80. And thats one badass axle there.

 

Anybody have pictures or a writeup on running a dually axle on a bronco with single wheels?
-Will
89 XLT 460