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I have a 1996 F250 with the 7.3L PSD with 202,000 miles that is having some intermittent transmission issues and usually show up under load. The pickup has a new VSS as well as a rebuilt PSOM, speedometer and cruise work as they should. Also, all brake lights have been checked including the 3rd brake light, all are functioning properly and are incandescent bulbs. The code I pulled was P1728 and has since been cleared and has not returned. The fluid was changed around 20,000 miles ago with a new filter and I installed a remanufactured solenoid pack which I don't think was great quality. The pack passed the in the lower end (20.5-21.5 ohm) of the specified range between all pin point tests. I already ordered a remanufactured Sonnax Solenoid pack since the current pack did not hold any air (less than 5 psi) on the ball seats and seemed to leak to the bottom of the solenoid body. The issue I am having is in third gear there is pulsing when the torque converter is locking but once it is locked it seems to hold well. When going into a 4th gear shift on its own there is approx. a 50 RPM flair then the converter locks and it seems good to go. If i manually shift it into 4th gear by using the OD OFF button it seems to shift like it should with minimal flair. The trans does not get hot, 180-190 deg F is about as warm as it's ever been. When code was thrown I was going up hill with a one sled on the sled deck and the trans temp was around 140 deg F with a 20 deg F ambient temp, but rose to 165 deg F and never went much above that. I have been using a Snap-On brick scanner to monitor and all solenoids seem to be commanded on and off when they should, although the torque converter solenoid stays on when brake is pressed, but the converter is unlocking as seen on RPM gauge. I inspected the torque converter for signs of heat and did not see any discoloration or bluing. Fluid is darker than I would've expected but magnet had minimal material. I can't figure out if the torque converter apply piston is cracked or what exactly I have going on. The torque converter was upgraded previous to my purchase back in 2012 but I don't have paperwork as to what it was. Trying to decide if I should order a new converter or what the next diagnosis step is or if a rebuild is imminent. Any help is appreciated.
EDIT: The solenoid pack connector had trans fluid inside.
Post moved from Misc.> Transmission Code Scanned Torque Converter/ No obvious bluing Bottom of Pan Fluid Oil Drained from T/C Towel sample of T/C Oil
Make sure all 3 brake lights work, and that they are hologen bulbs and not LED's.
Check trailer connector for shorted wires.
Reset TPS by doing KOEO press gas pedal to WOT and release turn key to the off position and do this step 2 more times. Sometimes the PCM does some wonkie stuff with shifting and reseting the APS gets it back to normal.
I knew I was forgetting something when I moved my post over, sorry. All three brake lights including the 3rd high mount light all function properly and are incandescent bulbs.
The trailer connector was replaced last fall and wires were cleaned up, previous owner did have a topper that was wired into the clearance/ park light circuit, and I plug into those for the clearance lamps on my sled deck. The issue happened when clearance lights were off. Have not ran it much in the dark.
I did do a TPS voltage test with the scanner, images attached, but have not reset the TPS. Idle WOT
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E4OD Intermittent Shift/ TC Lock Issues
