Originally Posted by fishcrazy
Hi Crosley. Thanks for your input. I talked to a tranny shop yesterday and found one to do a scan. I do not know i fthey have the capability to do the type of scan you speak of though. Is this a tool capability that they all have?
I test drove the truck again yesterday and discovered something new about this issue. I had driven the truck for about 5 minutes or so when the truck started doint the same thain again. Not downshifting or upshifting and just stuck in second. I stoped to find something that was rolling around in the back and making a racket. I turned the truck off and about a nimute or less later cranked it back up and the truck was running properly again. No longer stuck in second. Could the computer have reset itself or something? That still does not tell me why it starts sticking in second gear in the first place though.
Shut down and a restart can reset a mild failure.
Scanners are not created equal. You need a proper scanner for live data stream from the vehicle to see what the PCM is telling the transmission to do. A 'code reader' is not useful for what you need to do.
You may simply have a problem with ground wires. Dirty grounds, corroded, loose. You may have a problem with the connector at the transmission. Dirty, bent pins, corroded.
You may have faulty solenoids. Were all electronics replaced during the repair?
Since you are a novice and did this repair using internet knowledge, anything may have been done incorrectly from a simple thing to complicated.
If you can determine the vehicle system is telling the trans the proper signals, you can narrow down the failure to a mechanical one inside the transmission. The electronics and mechanical parts of the trans must each be looked at to narrow down the cause