1997 4high not working but 4 low works? Plz help

[Heisler3]

So I bought this truck and the 4wd motor was not shifting so I bought a new one, while I am driving down the road my in 2H, the 4L and 4H flash and if I stop and shit it into 4L it will work, my 4L works perfectly with no problems but. I have NO 4H at all, I can’t find a form with these problems so I thought I’d give this a try. Also My abs light is on because my brake fluid level sensor plug got broke and I’m also like to know how to bypass that while I’m at it
It is a nob to switch it between 2H 4H and 4L

 

[Bear in the woods]

Think if you complete the loop by tying the wires that went to fluid level sensor it will go off. Sure it’s not stuck in 4high If push button. Think they have to go to high first. Then low. My understanding is it will not go to low, unless it goes to High first. So possibly stuck in High four instead of 2 Wheel Dr.

 

[Bear in the woods]

Also. Do you know what range it was in when you removed the motor. May not have been in correct position

 

[Uncle Gump]

Several diagnostics in the Tech Library...

Transmission, Transfer Case & Driveshaft - The Ranger Station

DISCLAIMER: Activities and vehicle modifications appearing or described at The Ranger Station and it’s pages may be potentially dangerous. We do not endorse any such activity for others or recommend it to any particular person – we simply describe … Continued

www.therangerstation.com

 

[pjtoledo]

are you sure the front is engaged when in 4low?

low and 4wd are 2 different functions inside the transfer case.
for 4H the only function is the front driveshaft is engaged.
for 4L both the front driveshaft is engaged and the gear reduction is activated.

in 4L if the front driveshaft fails to engage you can still get the gear reduction.

when the shifting motor turns it does not actually engage anything. it pushes on 2 separate springs, one for low range, the other for the front driveshaft.
these springs push both collars to engage L or 4H, if one of the mechanisms is jammed/broken the other can still work.

 

[Heisler3]

it is not engaging into 4wd all in the snow I’m drifting like it’s 2wd and I have had a buddy look at it, 4 low works perfectly just no 4H.

 

[Heisler3]

Also. Do you know what range it was in when you removed the motor. May not have been in correct position

It would of been, in 2wd does it need to be in 4wd?

 

[Josh B]

Does yours need to reverse direction 10 feet to lock back in ?

 

[pjtoledo]

It would of been, in 2wd does it need to be in 4wd?

due to the unique shape of the shaft and the receiver in the shift motor it can only go the correct way.
unless you have special talents