JohnBuuu

Hey guys,
I recently converted my 01 3500 drw to srw. I know there is a difference in the measurements on the dana 80 hubs and spindles for drw vs srw trucks.
Can anyone tell me how much wider the dually hubs are?

I am about an inch wider than I would like to be on each side in the rear but dont want to put the SRW hubs on if it will make me much more narrow. I cant imagine there is that much difference.

A picture for posterity (yes its getting paint very soon)...

Erska

Wow... You should paint the whole truck with that Intense Blue Pearl...

Nice conversion.

Tate

The dually has much more hub sticking past the wheel mounting surface than the SRW. So putting a SRW hub on a dually housing, in theory, would actually make it wider. Not sure if the SRW hub would fit, as the SRW have a D70/D80 hybrid axle. D80 center section, D70 tubes, as we found out in another thread on here.

JohnBuuu

I thought the housing is the same (isnt the dually d80 technically a hybrid too?), and the width difference is in the dually hub vs srw hub.
Is that wrong?

JLand

if i remember right, the 3500 Dana 80 is actually narrow from flange to flange than the 2500 Dana 80. the wider width of the 3500 come from the hubs. that could be wrong.

As I understand your post above, you have a 3500 Dana 80 with 3500 hubs still on it?

dodgeguy71

We have a winner Tate, as discovered the 3/4 ton has the dana 80 chunk, 70 axle tubes and spindles. The spindles are actually 2" diameter whereas your truck spindles....true dana 80 has something like 2.175 or better diameter spindles. So the hubs from the hybrid would'nt work on your truck.

When I converted mine to a dually I had to install spacers on each side of something around 4" thick to get it to stick out and make it look right. Seems like the cab and chassis diff is also different in some way but not sure what. It may be a bit narrower than the regular dually with the bed.

I'm sure someone has done this before and has a "conversion" kit to shorten you hubs or something, can't be the first guy to have done this. Good luck!

Shawn

JLand

that's what i was thinking of. its the chassis/cab 3500 Dana 80 that is narrower than the regular 3500 Dana 80.

JohnBuuu

Ah, so I would loose some of the one ton rated gear on the axle with a 3/4 ton hub spindle conversion.
Honestly it just seems easiest at this point to run a little more backspacing on my rear wheels. Im right where my tires are just a tiny bit too far out for the warn rear flares i have sitting here to cover, and my brake caliper is a little more exposed than I would like. I think an inch more BS would be a good compromise.

blackdiesel

The C&C D80 is 2 1/2 shorter Per side than the dually

Tate

Negative on that. The WMS to the axle shaft mounting surface on the dually hub is around 4.5" (just a guess, don't have the truck in front of me), where as the SRW would be around 2" or so. This being the case, the axle housing, from spindle to spindle, would have to be wider on the dually than the SRW. I know the 14 bolt rearends are like what you are describing, where there are different widths by using different hubs.

dozer12216

Back spacing of wheels is logical method to accomplish. The frame is narrow on DRW as I undestand and a Cab and chassis is perhaps different also. Go figure. And the year change some of dimensions.

2broke2smoke

okay here goes ...

i have had all three on the floor together ...

if the SRW axle is used for reference then

the cab and chassis axle is 1" narrower per side 2" narrower over all than the SRW

the dual wheeled with a bed axle is 1" wider per side than the SRW 2" wider overall ...

we measured these with a big square on a shop floor against the mounting surfaces for the rims ...

i may be off a little but not much

and my father in laws cab/chassis '01 has the identical frame width as my '01 ext cab ... and the distance between the springs was identical ...

the c/c axle was a direct bolt in ...

i posted on here when i made my shortbed a dually with c/c axle

https://www.dieseltruckresource.com/...d.php?t=129224

on tdr a member posted the pics on a larger scale for a clearer picture

basically if you go with a c/c your tires will be MUCH closer to the springs ...

XLR8R

^ Thanks - that's good info! ^



Shawn, are you calling the axle housings the axle tubes, or the axles themselves? Reason I'm checking is that on 2nd Gens the auto trucks had D70 rears & manual trucks had D80 rears (referring only to axle housing diameter) - the dimensional difference changes the size of the traction bars' axle mounts - to date that rule of thumb has been w/o exception. Not including the C&C trucks, of course.

RVTraveling

2broke2smoke, what, if anything, did you do to the wheel well in the bed?

Ken

2broke2smoke

nothing ... doubling the springs took care of any rubbing

i did bend the seem on the bottom of the bed where wheel well meets the bed just in case ...

i've hauled a first gen dually on a bumper hitch car hauler ...

and sled pulled twice and the wheels have never made contact ...