New solenoid...no luck!

Anyone have other suggestions? The most obvious is take it to the mechanic, but I would like to know what happened or how to solve the problem.

 

The plug in the picture appears to be the range selector switch. It tells the computer what gear the transmission is in and acts like the neutral safety switch as well.

 

Have had it at the mechanics for better than 3 weeks now and he has diagnosed that I need a new computer. He has run ohm and voltage checks on everything with the tranny. Once he thought it was the fuse box but realized he was bypassing the computer to make the tranny operate correctly. He installed the governor pressure sensor (the one i recieved from the parts store was wrong). I have never owned a vehicle that a computer has gone out on before. The only thing wrong with the computer is that it throws the tranny in limp mode, obviously not good. I just wanted to let anyone reading this post to know what has been going on and see if anyone has other ideas or causes.

 

Well broke down and got a rebuilt computer and had it installed. Good news! Tranny shifted fine...bad news computer was a POS and threw a p208 code so injector on #8 wasn't working properly. Damnit...Did these guys really reprogram the computer? I'll give them a chance to redeem themselves...hope they will do something for me since the mechanic has to reschedule it in and do the work again!

 

OK I am ending this post Finally for anyone wanting closure to my issue...The second rebuilt computer fixed my problem...truck is back to normal!!!