How To Tell If It's A Posi? Ratchet Locker????

[uglytruk]

I'VE RECENTLY COME ACCROSS several 3/4 and 1 ton axles. Some 2wd, some 4x4. Sometimes one can tell if it's a posi by checking the glove box sticker for G80. Or spin one wheel, if it's got a clutch type unit. But what about the centrifugal style. How do I tell w/o opening 'er up?

 

[k5freak44]

opening them up is the easyest but im sure there is a way to test it by rolling it.

i dunno

 

[dyeager535]

If you mean the gov-lock, which is pretty much universal for a G80 truck app, if both wheels will turn freely, both off the ground, spinning one tire as fast as possible by hand, will USUALLY get a gov-lock unit to lock up.

I don't mean get it moving slowly and speed up, I mean from no rotation to fast rotation as fast as you can jerk the wheel into motion. It should "bang" into lock and rotate both wheels the same direction.

 

[uglytruk]

Pretty much what I thought. These are usually sitting in a local junkyard. Sometimes dropped in the mud, and wheels jammed, so spinning them is only a dream.
Just made an offer on another K20. Glove box sticker indicates "standard differential" or something like that. No gear ratio indicated. My '86 'Burb says "G80 3.73 ". Very informative. 3/4's are usually 4.10-4.56. And some kid just offered to trade me 3/4's for my still on vehicle 1/2 ton axles from his '87 'Burb. Interesting. Andrew