New Life for a truck passed its prime

[RedHeartbeat]

The PCM is smart, if it doesn't see the whole circuit for the TCC it throws up a generic code.

[flattopwill]

man i sure wish i knew wth your talking about but i dont.

LOL

[flattopwill]

The PCM is smart, if it doesn't see the whole circuit for the TCC it throws up a generic code.

Well, hopefully matching the brake switch wire with the right PCM wire will fix it but I don't know if it could fix no first gear...

Any ideas on my starting issue?

[RedHeartbeat]

Sometimes codes are related. Get the major things fixed first and sometimes the minor things clear up.

[flattopwill]

You are right. I will get the brake switch wiring fixed first thing in the morning(which is 7am when I get off work lol) and see what that does. Thanks

[flattopwill]

So when I left work this morning it gave me all four gears...WTF?...for about 2 miles then it went back to just 2nd and 3rd. When its cold it gives all four gears but when its warmed up it only has 2nd and 3rd. Any ideas?

[keniff]

it cant handle the heat ;p jfwy uh maybe something to do with the valve body. like when the fluid thins out it cant push the balls around the valve body so you lose pressure an it shuts down the weak gears. I DONT KNOW IM JUST GUESSING

[farmtruc]

could be a loose wire making contact when cold and not when hot.
could be a solenoid not liking the heat.
and like mentioned above, the fluid is thicker when cold, maybe thick enough to make the vb work.

at least you know it will work, so the wiring and pcm are ok.

[flattopwill]

So where should I start? Solenoids?

[keniff]

pull the pan an check the wiring harness that runs through there. if you dont see broken/shorted wires then the wiring should be good. uh maybe the seperator plate is worn out (if the 80e has that) uh if all the wiring looks good pull the valve body an see if you can see something plugged/blocked/broken