Gm 2.5 ton axles

[flatblack83]

Maybe this is a better section for this.....Im looking to see how good and durable gm 2.5 tons are, i found troop carrier with them in thats super cheap....helps appreciated.

[fastlt1]

Are they top loader rockwells 2.5 tons off a duece and half?

[flatblack83]

I dont think they are top loaders, they are the axles with round tubes not square like rocks...remind you of a 9inch...

[iniviate]

i ran a set on 49" R1's with no breakage.

the front chunk spins backwords. you can either run the GM t-case, flip the chunk, or flip the housing. i chose to flip the housing, which gave me a drivers drop.

6.17 and 6.67 gears. the 6.17's should have stronger axles.

i wouldn't pay more than $500 for a set. any more than that and you might as well go top loaders, where parts are much more common.

[flatblack83]

So if i flip the chunk ill still have passenger side drop like the older chevys..? Im thinking of putting them in and getting 15 inch wheels if thats possible and running 40s, then my 350 .040 450hp ... with the low gears can really spin em real good. The only thing about that is i still like to run it from mud bog to mud bog with out a trailer and i dont think these will work on the road...lol.....so i mite have to build my blazer with them...

[jeepcj]

they have very big brakes your 15" wheels will not fit

[MUD SLUT]

These axles are rare and so are the parts, but from what I've seen they seem to be super-stout. I know a guy that runs them and swears they are stronger than a toploader. Is there any truth to that, who know's? I must say he flogs the heck outta that thing with some decent power and hasn't broken a thing on some 50+" ags. There are a bunch of minesota rigs running them with lots of success too. They are also nice for a rear engine.

[old ugly 54 chevy]

Originally Posted by jeepcj

they have very big brakes your 15" wheels will not fit

Not true,My brother ran a set on the street with 15" wheels and stock brakes.Granted the wheels had about 2" backspacing.He also cut the housings down and ran short axles on both sides

[jeepcj]

Both Boyce Equipment and Memphis have all the parts you could need. The brakes have dual cylinders and stop very well. I can lock up my 47s with ease. I know the brakes on my axles are to big for 15" wheels. Look at brake compared to the wheel in this pic, the brake has about 1 inch clearance of the wheel making the brakes about 18" in diameter. The axles came on M211s and M135s one of them may have smaller brakes. Boyce sells Detroit Lockers for them. Has anybody done Pinion brakes on theirs? I would like to see some.

If you flip just the 3rd member the short side axle need to be cut down about 3/4 of an inch to fit back in. There is about an 1 1/2 spline so its not to bad. You can do it with a grinder just take your time. I orginaly had the single speed transfercase from the 2.5 ton truck I found a 2 speed case from the 1.5 ton truck and it will be going in this winter.

[flight2k5]

Originally Posted by jeepcj

Both Boyce Equipment and Memphis have all the parts you could need. The brakes have dual cylinders and stop very well. I can lock up my 47s with ease. I know the brakes on my axles are to big for 15" wheels. Look at brake compared to the wheel in this pic, the brake has about 1 inch clearance of the wheel making the brakes about 18" in diameter. The axles came on M211s and M135s one of them may have smaller brakes. Boyce sells Detroit Lockers for them. Has anybody done Pinion brakes on theirs? I would like to see some.

If you flip just the 3rd member the short side axle need to be cut down about 3/4 of an inch to fit back in. There is about an 1 1/2 spline so its not to bad. You can do it with a grinder just take your time. I orginaly had the single speed transfercase from the 2.5 ton truck I found a 2 speed case from the 1.5 ton truck and it will be going in this winter.

How can you put a pinion brake on it?

[Red Chevy]

Pinion brake would be pretty easy to fab up, just make a bracket to bolt to the pinion support and use the pinion flange for the rotor just like a toploader pinion brake. Most of the strength issues that people have are because of the ball knuckle type joint instead of a u-joint, just like the toploaders with the non u-joint style shafts. Depending on how hard u beat on it and the horse power u are applying to it.

[jeepcj]

Originally Posted by Red Chevy

Pinion brake would be pretty easy to fab up, just make a bracket to bolt to the pinion support and use the pinion flange for the rotor just like a toploader pinion brake. Most of the strength issues that people have are because of the ball knuckle type joint instead of a u-joint, just like the toploaders with the non u-joint style shafts. Depending on how hard u beat on it and the horse power u are applying to it.

I know some of the FLA guys on Chucks Trucks have done it. But I have never seen how. I'll figure it out over the winter. The truck is a M715 with XLHs and a 427 tall deck stock. I do not plan on beating it to bad. I have the CJ5 for that.

[pennsylvaniaboy]

Originally Posted by jeepcj

Both Boyce Equipment and Memphis have all the parts you could need. The brakes have dual cylinders and stop very well. I can lock up my 47s with ease. I know the brakes on my axles are to big for 15" wheels. Look at brake compared to the wheel in this pic, the brake has about 1 inch clearance of the wheel making the brakes about 18" in diameter. The axles came on M211s and M135s one of them may have smaller brakes. Boyce sells Detroit Lockers for them. Has anybody done Pinion brakes on theirs? I would like to see some.

If you flip just the 3rd member the short side axle need to be cut down about 3/4 of an inch to fit back in. There is about an 1 1/2 spline so its not to bad. You can do it with a grinder just take your time. I orginaly had the single speed transfercase from the 2.5 ton truck I found a 2 speed case from the 1.5 ton truck and it will be going in this winter.

Pictures of the whole truck?

[Blown74Ford]

The way the rear ends are set up...you just remove the cover and and switch drop -in to the other side (bolts all line up) you go from a high pinion to a low pinion like a 9-inch ford and this gets you the right rotation,and then it is easy to make it a crossover steer, by moving steering arm 90*. My truck had 4 wheel steering(two front ends, both narrowed) and the brakes on the front ends are (only) 16" drums. (the rear end had 19" drums) I had 2"back spacing and a short axle on both sides .

[flatblack83]

Originally Posted by Blown74Ford

The way the rear ends are set up...you just remove the cover and and switch drop -in to the other side (bolts all line up) you go from a high pinion to a low pinion like a 9-inch ford and this gets you the right rotation,and then it is easy to make it a crossover steer, by moving steering arm 90*. My truck had 4 wheel steering(two front ends, both narrowed) and the brakes on the front ends are (only) 16" drums. (the rear end had 19" drums) I had 2"back spacing and a short axle on both sides .

Any pics of how this is or was..?

[jeepcj]

enjoy

[flatblack83]

Awesome looking rig...... a friend of mine is going to put them into his wrangler, soon(winter project). He wants to run 44s and i think they are going to take off the drums, narrow both axles and make brackets for pinion brakes so they can run 15 inch tires. A friend of mine is real good at fabbing up stuff like that so there all fired up to starting a new project, They said about welding up the rear set of spiders for now and seeing how it does. Also there is a guy close that makes driveshafts. The jeep has a mustang 5.0, 4spd and a 205.... It should be a pretty cool jeep when done, i should say whats left to the jeep....lol

[fastlt1]

Originally Posted by jeepcj

enjoy

What size are those tires?

[jeepcj]

Originally Posted by fastlt1

What size are those tires?

16 x 20 53" tall

[dfl701]

Originally Posted by flatblack83

Awesome looking rig...... a friend of mine is going to put them into his wrangler, soon(winter project). He wants to run 44s and i think they are going to take off the drums, narrow both axles and make brackets for pinion brakes so they can run 15 inch tires. A friend of mine is real good at fabbing up stuff like that so there all fired up to starting a new project, They said about welding up the rear set of spiders for now and seeing how it does. Also there is a guy close that makes driveshafts. The jeep has a mustang 5.0, 4spd and a 205.... It should be a pretty cool jeep when done, i should say whats left to the jeep....lol

i thought these were gonna go under your rig there for a while

[flatblack83]

I thought about it, but my rears are redone and the d60/14b handle 39s pretty good, the problem is i like to drive mine around and dont really need to tear it apart....

[dfl701]

yea you dont really need them. tell him to start a thread on here

[jeepcj]

Originally Posted by flatblack83

Awesome looking rig...... a friend of mine is going to put them into his wrangler, soon(winter project). He wants to run 44s and i think they are going to take off the drums, narrow both axles and make brackets for pinion brakes so they can run 15 inch tires. A friend of mine is real good at fabbing up stuff like that so there all fired up to starting a new project, They said about welding up the rear set of spiders for now and seeing how it does. Also there is a guy close that makes driveshafts. The jeep has a mustang 5.0, 4spd and a 205.... It should be a pretty cool jeep when done, i should say whats left to the jeep....lol

When your friend makes the brackets for his pinion brakes have him make 2 more for me. Let me know what he want for them.

Thanks

[crash-harris]

Hey jeepcj, what is the designated model number for that thing? AMC I'm guessing since it looks so much like the duece?

[jeepcj]

Originally Posted by crash-harris

Hey jeepcj, what is the designated model number for that thing? AMC I'm guessing since it looks so much like the duece?

It is a Kaiser Jeep M715. 1967 the GM axles do almost look stock