Shifting too early!!!!!

[away]

What controls the shift points PCM or throttle potentiometer or what?

What do I check......this will roast the high gear clutches in a hurry?

Help!!!

[ipz2222]

tps,throttle position sensor, vss, vehicle speed sensor, ect, engine coolant temp sensor, brake switch.
How early??? Way early means the computer thinks it's in 4wd.

[away]

It will be in high gear before I can make it through a red-light. So what do I do break down and take it to Ford???

[ipz2222]

If you don't have a good local trans shop available.

[away]

Trans shop (performance transmission) tells me with their scanner that every thing is working properly that it is just getting the signal from the PCM too early.

[ipz2222]

That is correct. It thinks it's in 4wd low. I've never seen the problem but have heard others haveing it.

[OregonStroker]

Wow thats crazy. Look for a PCM from a local yard with matching numbers. Or take it to ford and have them re flash it for 95 bucks...

[away]

PCM matching numbers purchased and on the way. I also have a P0605 (Rom Error) DTC code. I thought the truck might have been chipped or something. I pulled the PCM....took the cover off and no evidence of anything.....all silicone present and everything. I should receive it by thursday......I'll keep everyone posted.

[ipz2222]

(took the cover off, no evidence of anything) . '96 up computers are not 'chipped' anymore. They are reprogrammed thru the diagnostic connector.

[Terse]

Any up dates on this? I've got a truck that does the same thing.