YJ Vacuum motor problems

[Old Fart]

GM???
anyhoo...
just take the axle shafts out of the YJ and install TJ shafts. The TJ's do not use the disconnect thing and they have the dana 44 size u-joints. You will not notice any difference in milage of any ill-effects.

Be sure to balance the front driveshaft! TJ's come balanced from the factory, YJ's don't. _Some_ YJ's were pretty close, most I've seen weren't

[TC Offroad]

Went ahead and put the posi-lock cable system on, works great. It was a very simple install. No more 4x4 woe's for this YJ, at least not for now.
My CJ full restore is coming along nicely though, hopefully soon I won't need to use that YJ to hit the trails.

[poultry411]

I hear these things suck, some guys replace it with a manual pull shifter (speedo cable style under the dash). FYI- I just talked to one guy who got all frazzled on the setup cuz' the axle wouldn't unlock. Wound up being the ball bearing style valve in the t-case. I have the same thing on my yj and a simular setup on my K1500 (the GM vs. gets really slow with age).

[Elusive]

GM???
anyhoo...
just take the axle shafts out of the YJ and install TJ shafts. The TJ's do not use the disconnect thing and they have the dana 44 size u-joints. You will not notice any difference in milage of any ill-effects.

[TC Offroad]

What was GM thinking when they got rid of manual hub locks!!!! I've temp. gone from restoring my beloved CJ, to fixing a 90' wangler for my wife. The newest edition to our Jeep family is fine, except for that damn vacuum motor on the axle(WHAT WERE THEY THINKING!!!!!!). I need some help with this one. The YJ's got 164,000 mi. on it, if anyone has info(vacuum diagrams, how long this motors's last, etc.)it would be greatly apreciated!