Jlk111205

Few months ago I noticed the vacuum housing I believe its called for the 4x4 on the roght front axle of a dana30 was disconnected, I connected it all back up and now every now and then I have a "Part time" light that flashes on and off on my dash, past few days its been constantly on. , recently had the right front inner axleshaft seals replaced , the part time light used never b on until I hooked that connector back up, anyways wat im gettin at is, wen turning and getting up on the gas I have a minor to bad shaking, and taking off gettin up on the gas it sometimes does it, not all the time tho , but does anyone kno wat it is or could be?

colorado_96

is it the right vaccum line? beacuse it sounds like the shaking is being caused by the front axle being connected when its not supposed to be

Jlk111205

Yea its on the right side of the front axle. I have a pic ill post but its only where the housing is. and yes its seems like its coming from the front axle. I assuming the part time light means in 4x4 part time ??? If its not supposed b connected y is it there? Wen I bought my jeep it was disconnected and zip tied up, I do believe wen I put it in 4x4 the oart time ligbt goes off? Lol im not understanding any of this wat its supposex to do lol . Much needed help

Jlk111205

This is best pic I have . The housing is removed to the inner seal could be replaced, but tbis my right front of my axle lookin torwards the front of the jeep from underneath .

ddbaz

VTJeep

Colorado_96 asked if the vacuum line is connected properly, not of it's position was on the right (or left) side of axle.. And as for your issue, idk, if you have a vac line installed incorrectly then the shudder could have something to do with this, or it's coincidental. How are u joints, alignment, trac bar, and all other steering and drive line components?

Jlk111205

I kno I could use an alignment, trac bar and all seems ok , everything is tight new stabilizer shock. How do I kno if its hooked up properly if I unhook it will my 4x4 still work. Like I said wen I bought it , it was unhooked and zip tied off I wanna,say the 4x4 worked I sure I used it getting in and outta my yard few times ???

Jlk111205

Should I disconnect it?

Jlk111205

It only hooks up one way right? How cpuld it not be hooked up right. I cant find any write ups on this issue , and I kno little about it

413maxwedge

Get a manual like a haynes, it will show all the proper hook-ups for you. A FSM is better but the haynes is only 20 bucks at the auto parts.

cruiser54

You could leave that front axle engaged forever and it wouldn't cause a shake. The factory eliminated all that vacuum crap and shift motor junk in late 91. So 91 and later were always engaged. Here's a simple way to eliminate that system and know you'll get 4wd when you need it.


https://www.cherokeeforum.com/f51/fr...ss-91-a-38629/

Jlk111205

I disconnected it, its not shaking like it was, im gettin a manual today

Jlk111205

Yeaaa I ended up hookin it back up lol. Getton manual tomorro my brake booster has a vac leak it may be interferring with the whole vac system itself

TheNerd

As mentioned, the vac actuator should not be a contributing factor to your vibes. The fact that they get worse when your Part-Time light is engaged (to me anyway) tells the that it is front drive shaft/pinion related. With the front axle disconnected, the front drive shaft is free to turn at any speed, but with the axle connected the front DS has to spin proportionally to your speed (*oversimplified, but...). I would start by checking your front DS U-Joints and ensure your front pinion isn't all sloppy. If they are OK (and assuming you have a lift), then next thing I would look at is your front pinion angle. It may be that when you hammer down on the gas, the axle-wrap up front is causing the drive shaft angles to exceed the max operating angles of the U-Joint(s).

austinjoe13

I helped a friend of mine swap motors in his old S10 pick up this past spring. We put a junk yard motor in it and when we were done it shook like hell when accelerating. His step dad had his shop guy check it out and it had a bad injector and was missing at higher RPMs, not at cruising speeds though.

I'm just throwing this out there.