Bersaglieri
Ron Swanson's Brother
- Joined
- Jan 8, 2008
- Messages
- 1,957
Suddenly the other day while running around town my truck shifts into overdrive in at little higher RPM than usual. I thought nothing of it until I got back into the highway and it wouldn't go into OD at all. Typically I use the "OD" button to manipulate overdrive, but now even the button won't work. The converter will lock up in 3rd, unlock when I press the "OD off' button to shift into 4th, but 4th never happens.
So I tried adjusting the TPS, I must have made things worse because now it won't lockup or shift to 4th. So I'm contemplating doing the Pot mod and ruling out the TPS as the problem.
But I'd like to request a little help on what else I can diagnose. How can I check the "OD off button?" How can I test the see if the ECM is 'commanding' a 4th gear shift? Anyone have a range of pressures for each of the ports on the trans? Which wires/plugs going into the transmission control OD? I've got a Garmon valvebody.
Last, I've found alot of dead links for the parts for the POT mod. Does anyone have part numbers I could just go to radioshack in town and buy? I'd like to get back to hauling gravel Monday...
So I tried adjusting the TPS, I must have made things worse because now it won't lockup or shift to 4th. So I'm contemplating doing the Pot mod and ruling out the TPS as the problem.
But I'd like to request a little help on what else I can diagnose. How can I check the "OD off button?" How can I test the see if the ECM is 'commanding' a 4th gear shift? Anyone have a range of pressures for each of the ports on the trans? Which wires/plugs going into the transmission control OD? I've got a Garmon valvebody.
Last, I've found alot of dead links for the parts for the POT mod. Does anyone have part numbers I could just go to radioshack in town and buy? I'd like to get back to hauling gravel Monday...