85' CUCV 1-ton to 1/2 ton diff's

[Rock_Solid]

I recently got an 85' CUCV without the one ton diff's (the guy wants them for a mud truck). My question is, Can i throw in some 1/2 ton blazer CUCV diff's and the driveshafts still work? I want to hold off with the 1/2 tons until i can find a 60/ 14bolt comco.

 

[Westech]

The rear will work with the correct u joint that goes from 1 ton to 1/2 ton... a good Napa store should be able to get you the correct one. I have done it in the past on a couple trucks. I have never changed the front but I would think it would be the same way with the u joint.

 

[Rock_Solid]

thanks! one is better than none. Lets see if i have the same luck for the front, and i'll let you know.

 

[11Echo]

I recently got an 85' CUCV without the one ton diff's (the guy wants them for a mud truck). My question is, Can i throw in some 1/2 ton blazer CUCV diff's and the driveshafts still work? I want to hold off with the 1/2 tons until i can find a 60/ 14bolt comco.

Just go buy a rusted out 3/4ton GM from 73-87 and use the axles from it. I bought a 79 K20 Suburban for $600.00 and used the Dana 44/14bolt FF,(3.73 gears), for a project. It also included a T400 tranny. Unless you are going to run huge tires and run mostly off-road, you won't need the Dana 60 front for a daily driver.

 

[Rock_Solid]

I got the idea from the project CUCV in offroad magazine. I need to find a 60 front because i already have 39.5 tsl's waiting for the truck.

 

[kennyw]

The spring perches and shock mounts would also need to moved on a 1/2 or 3/4 ton axle to fit the M1008 CUCV.

 

[Rock_Solid]

Hopefully only the spring perches in the rear need to be changed, im guessing. All this to keep the truck rolling.....i need my diff's!

 

[Cucvnut]

that should be all and make sure the axle can mate up to the drive shaft

 

[acmunro]

One thing I found in my axle swaping quest was -
Most crew cab 20 series Chevy trucks (3/4 tons) if not all from the 80's have the same spring perch width and shock mount as 1 ton trucks. Don't know if this helps, but it might help some one out in a future search.

 

[Rock_Solid]

Very interesting! a blazer on mogs!

BC4x4.COM four wheel drive, 4x4, offroad and fourwheeling site.

This might be an option for me!

 

[kennyw]

One thing I found in my axle swaping quest was -
Most crew cab 20 series Chevy trucks (3/4 tons) if not all from the 80's have the same spring perch width and shock mount as 1 ton trucks. Don't know if this helps, but it might help some one out in a future search.

Crewcab C20's actually use the 1 ton frame with lighter leaf packs is all.

 

[acmunro]

"Crewcab C20's actually use the 1 ton frame with lighter leaf packs is all."

That is what I figured, but had never heard that before.

 

[kennyw]

Also, you can stuff the 1/2 ton axles into the 1 ton without modification by just prying the leaf pack into position if your only goal is to keep it rolling. I wouldn't do that if you plan to put it on the road, but it would be fine for rolling around the driveway.