Bring my 99 Expedition's 4wd to alive

[Milwaukee]

It been almost 1 year I disable 4wd because of issue with transfer case.

Right now I really need 4wd FIX

Problem is it stuck in 4wd no way to disable. Unplug fuse and cut brown wire it still in 4wd. It going in 4wd Low no problem.

I remove driveshaft and check it was STUCK in 4wd all times.


Other issue with front axle. It axle shaft go in housing had play and make noise. I wonder if I can replace bearing/seal without remove front axle off?

Reason I want FIX cause it had snowplow so it suck to push in 2wd.

 

[bedrck46]

The Vehicle Does Not Shift Between A4WD and 4WD Modes Properly

check
4WD mode switch.
Circuitry.
CJB Fuses 23 (10A) and 20 (5A)
A4WD clutch relay/circuit.
Contact plate sensors A, B, C and D circuits.
Transfer case shift motor/circuit.
Transfer case shift relays.
Transfer case mechanism.
GEM.

Rotate the mode switch to the A4WD, 4H, and 4L positions.

Measure the resistance between mode switch terminals 2 and 3 while rotating the mode switch through all switch positions; refer to the following chart.
Mode Switch Position Resistance Range
A4WD 3,700-4,100
4WD HIGH 1,040-1,160
4WD LOW 340-380

 

[Milwaukee]

To let you know 4wd shifter is work right I'm sure

I get codes say clutch issue in transfer case.

 

[bedrck46]

what are the codes you get also would have been helpful had you mentioned that in the original post

 

[Milwaukee]

I will need plug scanner in there again it real cold to do.


I let you know by tonight when I get chance to do that.

 

[Milwaukee]

So mad in myself it not show up on scanner and I delete pictures on my phone which had scanner codes.



Here old thread if that help you. 1999 Expedition Eddie Bauer issue with bind A4WD transfer case - Ford Truck Enthusiasts Forums


I remember see it said clutch electrical issue in transfer case.

What I notice when I remove driveshaft I couldn't turn hub on transfer case it lock in 4wd.

I remove fuse it still engaged in 4wd when moving.

 

[bedrck46]

did you measure the resistance values of the mode switch

 

[Milwaukee]

No but it was -4oF with wind chill


Code I got for ABS is C1107 I don't know if it help you.


I plan do that test tomorrow if it isn't too cold.

 

[bedrck46]

google

"expedition code c1107" you can see what all it means

 

[Milwaukee]

Yes it related to ABS issue. I notice speedometer act weird rarely like 1-2 ph jumpy


I wonder is there way to disable auto 4wd. Stay in 2wd until I switch to 4wd?

 

[Milwaukee]

Back on here.

It really weird. It randomly that it stuck in 4Wd on/off suddenly 2 weeks ago it STUCK in 4WD all times. Pull fuse it still stuck in 4WD.

At tire shop yesterday they lift my expedition off ground so I got curious and try spin front wheel. It wouldn't turn driveshaft to transfer case it stuck in 4WD.


Do you think it transfer case? It seem like it stop work then next time it work right.


When it work I can tell it shift in 4WD when I got stuck on ice in Detroit. Now it just stuck in 4WD all times.

 

[FordandPolaris]

Well if I am understanding right, you are currently locked in 4H? If that is the case I would guess maybe the shift motor went out.