I have a problem and don't have a clue what to do next, any help will be appreciated.

Truck - 1991 GMC P30 (step van) with 6.2 liter diesel with 4l80e transmission.
Blew the transmission so rather than pay for a 60 mile tow to the nearest transmission shop decided to rebuid it myself. (please stop laughing).
Rebuid seemed to go great, upgraded everything, transgo kit, all new cluthes and steels, kevlar bands, and a new overdrive assembly (the roller cluth had self destructed), new selenoids, internal wiring harness, plus new bearings, seals, and gaskets. No problems untll I had installed eyerthing only to discover that nothing works. (OK now you can laugh)

Diagnostics to date shows no fuid being pumped (disconnected cooler lines with engine on), no codes.

Prior to disassembly checked distance from front of transmisson to front of torque converter and had exactly same distance after rebuild (11/16th in).
However when I went to install the torque converter to flex plate I had to shove the torque converter forwrd 1/4 to 3/8". I assume this disconnected the torque converter from the pump but have no idea what caused this and worse how to fix it. New Torque converter was purchased from oregon performace transmission.

All joking aside I'm in serious trouble here, any help would be appreciated.

lharding

Problem solved. Thanks.

Now have new problem. Have a strong 1st gear, but when transmision trys to shift into second transmission slips out of gear and engine revs up. Drops back into first ago but top speed is 15 mph. Reverse seems to work ok.

Any suggestions.

Did you rewire external harness to match your new internal harness? That is a must.

Nope, dummy didn't think of that. I'll work on that today, thanks again.

Lonnie

To Mr Mike L.:

Thank you for your kind reply. Checked out the external cable as you suggested, no problem there but did discover that I had hooked up the internal selanoids backwards. I didn't pay enough attention when installing. Did the old green wire to "B" per the instruction but found out yesterday that the new harness isn't wired that way ("green goes to "A").

Again thank you for your assistance, it sure is nice to have my old truck on the road again.

Lonnie