We often use a little brake action via park brake Or foot brake to get the posi to grab. Same principal can also help a heavy foot on throttle driver in an open diff to control wheel spin while wheeling.

_________________
99 TJ
71 C101
04 KJ
03 SFA KJ Sport
LOST JEEPS So-Cal

I approve and applaud your edit. If you knew you had an appoinment for new tires the next day and they were just going to recycle the old ones...may as well burn em off a little make the tires lighter for the techs to handle...

_________________
'02 KJ Sport V6 4x4
3/8" Clevis lift
Rusty's 2.5 lift
255/70/R16 Fleet Farm All Terrain (yes they work)
Class 3 hitch
Hellas
Police Scanner/CB radio
LOST #: JH061986

Can't you do the old test we did on MB and CJ axles? Jack the rear into the air, rotate a wheel, if they turn the same way it's a posi, opposite ways it's open.

_________________
No one knows as much as all of us.

That way should work as well as it will test not only if you have-but if it works. I didn't think MB's cam with posi though...

_________________
'02 KJ Sport V6 4x4
3/8" Clevis lift
Rusty's 2.5 lift
255/70/R16 Fleet Farm All Terrain (yes they work)
Class 3 hitch
Hellas
Police Scanner/CB radio
LOST #: JH061986