YJ Axle Shift Motor

You can pull the vacuum hose plug off of the front axle and then with the engine running see if you can tell if one side still has vacuum to it. If it does, then place that side onto the opposite fitting from where you pulled it off. That should disengage it and hold it there until you can check out the entire system. You didn't tell us what type of vehicle you have but if it is like mine (91 YJ) then this should work for you. My YJ has the switch for the 4WD light on the front axle disconnect so it would still be lit up if the front axle is still engaged. Might yours be like this also? If so, you have a different problem.

Good luck and Happy New Year! Dave

No... you posted as "Jeepster" and the other guy is "Jeepers". As far as your YJ... it is vacuum activated, and prone to problems. There is a modification that eliminates the vacuum actuator. I'm sure someone will chime in with the link (Bill).

-- JimG

Beat ya Bill:

JimG

Try again to connect it all together:

Hmmm... still didn't work... I never be as good as Bill. :-(

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You didn't say what year or model, there are some differences. Pressure switch on the firewall sorta indicates '87 to '90 YJ Wrangler.

First off, don't worry about the front axle being continuouisly engaged, all of the TJ's ('97 and later) run that way all the time.

The shift motor is vac pulled each way, in and out. The 4wd pressure switch and the 4wd light are quite reliable, if the light works and responds, things are usually all right in the axle. In fact, the light will not go out until the axle disengages.

The really shaky part of all this is the vac lines and the switch on the transfer case. ($35 and $15 respectively)

So if all that works, I have to ask what makes you th> I was posting as Jeepers and just realized that someone else posts

It seems to have a bit of bump steer ..... not real bad but n>You didn't say what year or model, there are some differences.

What size suspension lift do you have, if you have one, and do you have the factory Pitman steering arm or a dropped Pitman arm?

Jerry