it is a box van came in with P1744, po741, po781, po782 we found burned frictions and rebuilt with a rebuilt t/c, sonnax accumularot kit, superior kit and after overhaul it has 1-2 only. I called ATSG and the first guy said it is inside the unit and out it goes and found nothing wrong inside, line pressure is within specs and out it goes again with the same problem only shifts 1-2 code PO782 and I talk to ATSG with a second guy who tells me the problem is not inside is either valve bocy, solenoid block or accum body; so I have tried 3 different solenoids (2 rebuilt and one used) and 3 different accumulator bodies and 2 different v bodies with no luck. Trans only shifts 1-2.
PO782 2-3 shift error
Problem
shifts 1-2 after overhaul I've pulled the unit again and didn't find a wrong thing with it please any help?
Update
we put another unit on it and it works but now I have to build the original the came out of the truck with the 1-2 shift only and find the problem but I'm not sure what to look for since I've been thru it once. I will appreciate any ideas on what to look for that cause this trans to shift only 1-2. I tryied 3 different accumulator bodies, 3 different solenoid blocks and 2 different v. bodies and same thing now we put another trans and it works ok please any help?