No front wheel spin with 4weel drive engaged

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ga_cis

NAXJA Forum User

Location

Georgia

• Nov 10, 2007

• #1

I am new to Jeeps and have a 90 XJ with the command track transmission (no fulltime 4wd). The indicator light for the 4wd does not come on when engaging 4wd. With 4wd engaged the it appears that the front wheels are not pulling at all. The transfer case seems to engage properly and there are no unusual noises. The rears will spin and the fronts just sit there. What sort of a problem might I have?

 

JNickel101

NAXJA Forum User

Location

Alamogordo, NM

• Nov 10, 2007

• #2

IIRC, that's a vacuum disconnect front axle, I'd say it has something to do with that....

 

G

ga_cis

NAXJA Forum User

Location

Georgia

• Nov 10, 2007

• #3

Thank you. That sounds like the first place to look. My last 4wd was a 72 FJ40, no vacuum nothin.

 

JNickel101

NAXJA Forum User

Location

Alamogordo, NM

• Nov 10, 2007

• #4

I have never really worked with the vac disconnect axle, so i'm not really sure what to look for, or how it works - but my guess would be check the line first and see if its even connected...

 

xjwisconsin

NAXJA Forum User

Location

sturgeon bay, wisconsin

• Nov 10, 2007

• #5

If so here is a really quick and easy way to check some stuff out
1. block the rear wheels
2. take a jack and jack the front passenger side axle up so the tire spins free
3. Start vehicle and engage 4wd low or hi, doesnt matter
4. get out and try to turn the front drive shaft (cant turn it? good, transfer case properly engaged)
5. if Tcase working go the passenger front wheel. can you spin it? (if yes not good) means several things

try this out and see where the problem is at

 

G

ga_cis

NAXJA Forum User

Location

Georgia

• Nov 10, 2007

• #6

Thanks for the replies. Gives me a place to start. Cant start till Tue. though because the XJ is at the farm 90 miles away. I get to celebrate being a Vet on Monday.atriot:

 

3

3XJFamily

NAXJA Forum User

Location

Austin TX

• Nov 11, 2007

• #7

Just look for the vac line that's pulled loose from the axle first. . .

 

G

ga_cis

NAXJA Forum User

Location

Georgia

• Nov 12, 2007

• #8

The trouble was indeed a cracked vacuum line. Someone else had to show me what a vacuum line actually looked like. Then it was an easy fix.
Thanks for all the help. :loveu: