4x4 switch on dash not working?
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Freshman User
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4x4 switch on dash not working?
I have a 2000 F350 LB 4x4 Auto, V10.
4 wheel drive works fine, but the switch on the dash won't engage 4 high.
I can lock the hubs and 4x4 engages. I can turn the dial to 4 low and that engages, but no 4 high from the switch.
Anyone else have this problem? Think the switch is worth replacing before I take it to a shop?
4 wheel drive works fine, but the switch on the dash won't engage 4 high.
I can lock the hubs and 4x4 engages. I can turn the dial to 4 low and that engages, but no 4 high from the switch.
Anyone else have this problem? Think the switch is worth replacing before I take it to a shop?
Junior User
Joined: Jul 2006
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how bout when you have the switch in 2 wheel drive and lock the hubs? do you get 4 wheel drive then? if you still have 4 wheel drive then your t-case is stuck, either the motor or the switch isnt letting it get out of 4 wheel.
Elder User
Joined: Jun 2006
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From: Connecticut
You have the front axle locked yes.But do you have 4x4,easy test,loock your hubs.Flip the switch to 4x4 high,does the truck jerk?
Dont turn to sharp!!!Just enough to feel it.
on edit:unlock your hubs,start the truck,flip the switch to 4x4 high.Crawl under the truck and see if you can turn the front drive shaft by hand.
Dont turn to sharp!!!Just enough to feel it.
on edit:unlock your hubs,start the truck,flip the switch to 4x4 high.Crawl under the truck and see if you can turn the front drive shaft by hand.
Last edited by Green_Dually; Sep 7, 2006 at 03:15 PM.
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yeah i would do what green^^^ said. except leave the switch in 2wd and leave the hubs unlocked. can you move the front drive shaft? if you cannot move the drive shaft then your t-case is stuck in 4 wheel drive. someone with a little more experience with the t-cases and the 4wheel drive system can offer more advice on that.
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Elder User
Joined: Jun 2006
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From: Connecticut
Originally Posted by bobbo7915
yeah i would do what green^^^ said. except leave the switch in 2wd and leave the hubs unlocked. can you move the front drive shaft? if you cannot move the drive shaft then your t-case is stuck in 4 wheel drive. someone with a little more experience with the t-cases and the 4wheel drive system can offer more advice on that.
Cause he said the switch does not work.It could be the hubs that are not working,could be the vacum lines,could be the silond not working,etc,etc.
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Originally Posted by J--Rod
If I leave the switch in 2WD and turn the hubs to Manual Lock, I get 4WD. Should I not?
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From: Connecticut
Originally Posted by bobbo7915
from what he said here it seems to be he is stuck in 4 wheel drive. its not that he is having a problem getting into 4 wheel drive but rather that he is having a problem getting the truck out of 4 wheel drive.
he says:
4 wheel drive works fine, but the switch on the dash won't engage 4 high.
I can lock the hubs and 4x4 engages. I can turn the dial to 4 low and that engages, but no 4 high from the switch.
Last edited by Green_Dually; Sep 7, 2006 at 04:12 PM.
Post Fiend
Joined: Jan 2002
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From: USA
Originally Posted by J--Rod
Definitely not stuck in 4x4. Just problems using auto to get 4 high to engage.
Did you turn the front axle shafts by hand ? after turning the switch to 4hi?
Did you turn the front drive shaft after turning the switch?.
If you turn the switch to 4hi and your hubs are in auto and they lock in ,you will not be able to turn the front axle shafts.
You need to tell us so we can get you pointed in the right direction to resolve your problem.
Rich
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Okay. Thanks Guys.
With the hubs set to "Auto," I turned the switch to 4 high and nothing happened.
I then turned the hubs to Lock with the switch still in 4H and 4x4 engaged just fine. I then turned th hubs back to auto and the switch back to 2WD and 4x4 disengaged.
Next test: with the hubs set again to auto, I turned the switch to 4 low. I felt a slight "clunk" and 4 low was enganged. I turned the switch back to 2wd and 4 low disengaged.
The only thing that doesn't work is on-the-fly 4 high with the switch.
Does that make sense? Do I need to do additional testing to provide more examples?
Thanks again.
With the hubs set to "Auto," I turned the switch to 4 high and nothing happened.
I then turned the hubs to Lock with the switch still in 4H and 4x4 engaged just fine. I then turned th hubs back to auto and the switch back to 2WD and 4x4 disengaged.
Next test: with the hubs set again to auto, I turned the switch to 4 low. I felt a slight "clunk" and 4 low was enganged. I turned the switch back to 2wd and 4 low disengaged.
The only thing that doesn't work is on-the-fly 4 high with the switch.
Does that make sense? Do I need to do additional testing to provide more examples?
Thanks again.
Elder User
Joined: Jun 2006
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From: Connecticut
Originally Posted by krewat
Sounds like his hubs are not locking, Rich 
4LOW engages, and he notices the gear change, but I bet the hubs are still not locked...
4LOW engages, and he notices the gear change, but I bet the hubs are still not locked...
Agreed,maybe a vacum leak.
J--rod start the truck,turn on A/C to max vent.Not defrost,vent.Then flip the switch to 4x4.
This will tell if you have a major vac leak or not.