4wd vaccume engagement valve

2002 GMC Jimmy SLS
4wd
4.3 auto


I hear a clicking sound from the front of my truck everytime i back up slow, and accelerate slow aswell as braking slow, my front diff isnt fully disenganged. Ive already replaced the vaccume actuator underneith the battery, but do you think it could be the engagement valve on the front differential? And anyone have a guess on how much theses cost on ebay? (i searched)

2002 GMC Jimmy SLS
4wd
4.3 auto


I hear a clicking sound from the front of my truck everytime i back up slow, and accelerate slow aswell as braking slow, my front diff isnt fully disenganged. Ive already replaced the vaccume actuator underneith the battery, but do you think it could be the engagement valve on the front differential? And anyone have a guess on how much theses cost on ebay? (i searched)

Is the cabel in good shape.
Muddog has a how to on 4w stuff up in how to section.

yeah i just read that, i was just out driving around and went down a gravel road and it was in 2hi and i COULD do a brake stand, so im guessing my front diff is disenganged cause i could hear it shift when i put it in 4hi. But i still have that clicking noise everytime i back up, slow down, accelerate. It does it alot more when i am backing up and turning to.

yeah i just read that, i was just out driving around and went down a gravel road and it was in 2hi and i COULD do a brake stand, so im guessing my front diff is disenganged cause i could hear it shift when i put it in 4hi. But i still have that clicking noise everytime i back up, slow down, accelerate. It does it alot more when i am backing up and turning to.

If more on turning check axel joints and wheels and wheel bearings.

I would jack it up and put stands under it at all 4 corners of axels and look around under there.

well i know the bj/tr/wb are all good, but i noticed that one cv boot is starting to leak out grease on the RF.