need transmission help!

[cliff]

I recently went mudding in my 2000 expy, and once I got back on pavement I put it back in 4AWD but it felt like I was still in 4h except for the fact that the front wheels are not engaged. Now I can only use the 1st 3 gears and my overdrive light is flashing.

 

[Canadian Expy]

Sounds like you got water into some where.
I would unplug and clean any wires or sensor on the trans to start.
Someone else should chime in with other ideas

 

[FordandPolaris]

Fluid flush would be a good idea as well.

 

[daoud el-massri]

what size motor 4.6 or 5.4 witch tranie w/r70 or w/r100 First I would drain all tranie fluid replace filter cost u have water in the system somware if that dose not work I have a w/70 4x4 trance for sale it has 70,000miles on it comes with torque concerted and transfer 650.00 . Hope it is just water