GM 2.5 ton axles

[84silverado]

anybodys know anything about these? the set im looking into have 6.17 gears and seem good. anything i should be majorly concerned with about them? like bad thing they were known for or something like that? they are out of an old military truck i believe, not for sure. oh and how hard are parts for them to get? like seals, brakes, bearings, and etc. etc. etc....thanks!

[rockrat]

Boyce equipment carries all the rebuild parts, they're rated at 3 tons,  and you'll have to "flip" the front axle as it is a true reverse rotation. If you don't flip it, you'll need the military t-case (np200).  Look up www.swampdiesel.com   he did it and walks you through it with pics.
Once you remove the torque arms and mounts , they have close to the same clearence as a 14 bolt.  Oh yeah, like rockwells--heavy as in 650 lbs. a piece.  Cheaper than rocks, just as strong if not stronger (53" tires no problem), they just don't have the drivline angles like the toploaders do. I'm building a 6x6 with them.

[91 k1500]

pinions are weak.... just an fyi