posi front axle?
 

picked up a 71 k5 for parts! the options list front and rear positraction axles! is this common? also was there ever a factory gm snow plow? the reason i ask this is because there are a few decals stating plowing precautions that look GM!! thanks

Re: posi front axle?
 

I've only heard of one other having it so I would think it's not common. My Ford F150 has front and rear limited slips and it's pretty uncommon in Fords too. Looks like it could be fixed up. Oh and the plow could of maybe been dealer added.

Re: posi front axle?
 

If you aren't using some parts from it, I might be interested in what is left, and you aren't too far from me. Let me know.

Re: posi front axle?
 

My 72 Blazer has front and rear posi, it was just a special order thingy.

Re: posi front axle?
 

Is that top yellow or am I seeing things?

Re: posi front axle?
 

yes its john deere yellow!! painted by the original owner years ago... its a double wall factory color was black!

Re: posi front axle?
 

took the body off this past weekend!

Re: posi front axle?
 

what'd you do with the body?

Re: posi front axle?
 

stripped what i needed and set it aside! what are you looking for?

Re: posi front axle?
 

I had a Custom Camper/10 with front and rear posi.It`s a rare option to find.

Re: posi front axle?
 

Hi, I know this is an old post but do you still have the plow setup and if so do you want to sell it?

Thanks,
Jeff
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Re: posi front axle?
 

Re: posi front axle?
 

Sorry plow set up is gone!
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Re: posi front axle?
 

Not to put an old thread on life support, but a quick question on the front Positraction option (I think I know the answer);

Does this mean the standard 69-72 4WD Blazer front differential carrier is actually an open unit ..meaning only one of the front locking hubs (front left I assume) is operational and the other locking hub is just for looks and useless ?

If so, I guess the base model 4wd is actually just a "2WD", unless it came with the rear posi option, in which case it would be 3WD ..unless it also came with front posi option, making it a true "4WD" :D

And how do open front and rear diff. carriers behave in reverse, I assume the same as forward (same wheel spinning, only backward).

..guess I haven't expiremented enough.

Re: posi front axle?
 

Both hubs are functional. Both have shafts running to the differential. As long as both tires have traction then both tires get torque from the driveline. When one tire or the other hits a slick surface (or is lifted off the ground) then the open differential will drive that side. The purpose, of course, is to allow for speed variation between the wheels while driving on a surface with sufficient traction. In a turn the outside wheel travels a longer arc than the inside wheel so the differential allows the outside wheel to spin faster than the inside wheel. Unfortunately this also means in low-traction situations that it will push engine torque to whichever wheel has the least traction.

Yes, stock carrier is open, and the Posi units are a bit rare.