I want to replace the rear axle in my '75 HD 3/4 ton 4x4, what is the best option for a D70. I would like to go with disks, and I know some of the newer axles use them. Suggestions?

Has anyone installed an anti-lock brake system in these pickups?

 

See here Dana 70 Disc Brake Swap

http://coloradok5.com/forums/showpos...48&postcount=1

The regular D70 and the D60 are going to use the same brakes .. Here's one kit option http://www.tsmmfg.com/2660.htm

 

I build rear disc d70's on the cheap. 70's f350 2wd srw axle



Cut,drill tap my own caliper bracket



Just make sure driveshaft is in phase with the joints or you'll have to cut,reweld perches



If its stock hight should be ok

Parts list
78 chev 3/4 front rotors or ford dana 44/60 rotors
78 chev calipers. Cheap at parts store
For soft lines in rear I use 1980 chevette front lines. $10 each
.

 

You have to torch off the flange for drum backing plate. I leave about 1/2" of it on. Bracket welds right onto the spot you cut off. You will have to modify 1 thing for rotors to clear. Either lathe open Center hole like 3/16" OR take hub off and you'll see the 5 or so bumps on it that give you the clearance issue ,grind those back the 3/16" to have rotor mount flat,flush.

I did a dually d70 one on my latest disc swap(but for srw purpose) About 1 1/2" narrower than the srw d70 I did up top. Not really noticeable but 1/2" spacer plates could be used.
Top d70 runs a Detroit locker this one runs a powr lok.
Dually d70 seem to be more easy to get so its an option I did in this truck.

 

bolts right in!

 

Forgot the dually one right above here the spring perches were narrower. I cut them off and spaced them wider as needed.
I always put on massive 3/4" ubolts as I've twisted 9/16 ones offroad plus you can torque the crap outta them.

 

Does the OEM brake proportioning valve work as it should with the single piston calipers ?

 

With my hydroboost system on offroad truck I removed it as my rears locked up. Put in an adjustable prop valve.
This one on my DD brakes worked good. Factory prop valve still in.