Front seal went out on my trans. I changed seal . No more leaks ,but now wont shift on it's own. What did I miss? Need help please

 

Please list your truck details, we can't see it through the Internet.

Year, engine, transmission model (AOD, 4R70, 4R75, E4OD, 4R100, 6R80)?

 

1990 ford f150 351 Cleveland. Not sure of the transmission its automatic . I'm not sure where to find which trans it is.
It shifted fine before I changed seal.

 

Just curious. How did you buy the correct seal if you don't know what transmission it is?

 

I did put it back together and the torque converter was not positioned all the way inside the trans which left about a half inch in between the bell housing and the engine .I pulled it together .when i did this it locked it up so the flex plate and torque converter would not turn. I pulled it back apart and position it correctly. Hope i didn't damage anything. What about the neutral safety switch . If it's not position correctly could it cause this?

 

You have either a C6 or E4OD. The C6 is a 3 speed, the E4OD is a 4 speed electronic overdrive with an overdrive lockout switch. This could make a big difference in diagnostics. What is the TRANS code on the door jamb sticker? "K" is C6, "E" is E4OD.

https://www.f150online.com/forums/ar...tion-page.html

If the neutral safety switch is not positioned correctly, it won't start in P or N.

By the way, you don't have a Cleveland unless it's not the original engine, the only 351 in 1990 was the Windsor. If you have a Cleveland, it was swapped, possibly along with the transmission.

 

It's the e40d I said Cleveland because that's how its listed at the parts store.

 

Check all the electrical connections to the transmission.

 

I did break the odometer sensor would that affect it?

 

That would certainly confuse the PCM. Fix it. If it doesn't know how fast you are going, it can't command the transmission properly.