2008 freightliner sport chassis m2

pull the pan and see whats in the bottom.

 

Sound like the valve body is stuck. May want to try something like Lucas trans conditioner , or some thing the like. Try to free them up. If that don't work , your going to have to dive it any way.

 

Before pulling pan check and see if brake shoes are rusted to drums. If they are build up air release brakes hit drums with hammer to break loose. Be sure to chock wheels before doing this, Good Luck

 

First thing you want to do ASAP is take as much of the truck bottom off as possible and power wash it out to try and prevent corrosion. (or drive in a fresh water lake as deep as the flood was if you can get it rolling) My guess (havnt worked on these before, so truly a guess) is water got into the electrical systems of the trans or linkages and corrosion started. Unfortunately unless you clean every where flood water touched, you will continue to have problems.

I had a jeep get flooded in Huriccane irean a few years back. Right after the flood, i took it to a fresh water lake and drove around in about 3 foot of water. Never had a problem since. The water isn't the problem, its the corrosion of salt water. If you can clean it with fresh water real good you should be able to fix it. Anything with corrosion needs to be cleaned. Cables, connectors etc, replaced. Corrosion is like a virus, unless you get it all it will just come back.

That beign said, is the trans throwing any codes? That'd be a start. Good luck...I hope you got a good deal on the truck and if you can get it cleaned up you may have gotten the deal of the century on a low mile truck.

 

I've heard driver with auto not being able to get the trans in gear if one wire was broken or connection loose. Yes electrical problems can trump mechanical in this case. Assuming no water got in the trans (it could have depending on depth) the trans should be mechanically ok.