powerstroke help
 

i have a 96 powerstroke it's an automatic, and the light is on at the end of the shifter lever , it is a E40D and the only problem i have with it is it will not go into overdrive, so far i have changed the oil and filter. When i dropped the pan i didn't see any major amounts of metal or clutch material just a little bit of stuff on the magnet and the oil looked pretty clean. The only other thing i have done i pulled the harness off and checked for broken wires and i replaced the switch in the end of the shifter lever. Can anybody give me any suggestions as to what is going on ?

My 99 did that to me, FIRST hit the button on the end of your shifter, cause that button will lock your tranny out of over-drive when your towing, If the light doesn't go out, check your RPM gauge, does your RPM gauge work ??? I had to get a new tranny, cause my started slipping,:humm:

ya my rpm gauge works , and it will not go into overdrive , u can push that button as many times u want, and the light will not go out it shifts fine through all the other gears.

Sounds like a switch issue or a TCM Issue

im thinking along the lines of mysterync's idea. hook up a scan guage and see if you have any codes

i scanned my truck with three different scanners and there are no codes for the trany , i'm thinking there is either a broken wire that is keeping the over drive off or there is a internal problem that is not allowing the trans to go into overdrive ,but wouldn't both of those set some kind of a code ?

Check the harness that comes out of the shifter handle, at the bottom. I bet you'll find it worn through on the steel parts of the column.

What he said... Very common!

i did and there is nothing wrong with the wires right there i unplugged the wires right there and ohmed them out from the switch and they were all good , i'm maybe thinking that it might be a the connection to the pcm bc those are the only wires a can't really see , does any body have the pin numbers to those two wires that are on the pcm i know the one wire goes to number 17 fuse and the fuse is ok i just need to trace those two wires so i can make sure that they are ok

Have you pulled any codes?

i have tried with three different scanners and there is no codes for the tranny

now i can turn the key on pull the number 17 fuse for the tranny and push the overdrive button once and put the fuse back in and overdrive works all day long until i shut it off
and then i have to do it again , can anyone tell me why this is making it work like that, can it be a fried ecm ?

Could be a kind of relay that controls that switch. My dads excursion v10 but same trans idea was shifting funny.