Questions about Dana 70 vs 80 rearends

[glhs]

Hoping someone could answer a few questions.

1. Any body know what a first gen rearend srw weighs with the drums on?

2. What is the width difference between a srw and a drw?

3. On second gen 01. 5 & 02 trucks, what does a disk braked Dana 80 srw weigh?

4. What is the width from center to center of the spring perches and the distance from axle flange to axle flange?

Thanks

Kurt

 

[zstroken]

Standard DRW axle is like an inch longer or so. If you get the cab and chassis DRW it is actually shorter than the both the SRW and the DRW.

 

[Philip]

On a first gen the dually axle is the widest axle made. It is around 10" to 12"'s wider than your axle.



A C&C axle is 6" wider than your axle.



A model 70 probably goes around 300 lbs drum to drum. It is all two people can do to pick one up and move it around.



I can't help on #3.



I measured the center to center on a 2000 C&C model 80 axle a few years ago. It had the same center to center on the spring mounts as my truck.

 

[zstroken]

Are you talking spring perch width or axle width?? I have seen all three. The spring perch distance from center is the same with all 3 (SRW, DRW, and Cab/Chassis DRW) but the axle lengths are different.

 

[Philip]

Spring perch width. On the last line.

 

[glhs]

Just had my Dana 70 rebuilt w/everthing new including new clutches in the posi. ($1400). I am thinking a Dana 80 srw might go right in and I could have disk brakes too. If axle flange to axle flange is about 4" wider than what I have it would be perfect with my 02 rims.

Still wondering about the wieght difference.

Kurt

 

[Philip]

Here is a link with some info on the Dana 80 swap. It also has a couple of links in it with more infor.



https://www.turbodieselregister.com/forums/showthread.php?t=140038&highlight=Dana+80+swap



If you go to swap in a disk brake rear end. Don't forget to change out the master cylinder and brake proportioning valve. The drums uses a different one than disks.