Trans help/ advice needed
Recently installed efi live tunes from ppei on the truck and have now thrown limp codes twice in the past week or so. Each time it happened when trying to pass on the highway, didn't floor it (was already doing 72) added just enough to get it up to 80. Each time it hit 80, immediately have a clunk or thud as if it missed the gear and acted like it was stuck in the lower gear.
The first time it happened, got a cel and pulled over, checked for flud under the truck as it felt eerily similar to prior to christmas when I threw an end cap on the upper u-joint on the driveshaft which cracked the tail housing (rear adapter) of the transmission. Cycled the truck on and off, cel light went out and tranny acted as if it was just a hickup and was fine.
The second time (today) same lead up, but this time the cel is staying on. Took it to autozone and their scanner was able to read P0735 and P0843 (ironically the edge- used as the monitor/ inplace of the dsp5 switch- couldn't read these codes??)
When the dealership repaired the tail housing they did change it out while keeping the tranny in the truck- would that have caused any issues? Truck didn't have any issues prior to that (within this realm, this fall has been a saga thus far).
Was already planning on rebuilding the tranny this summer (it has 244K on it), will be looking at fluid levels and the such in the morning when the sun comes up to rule out low levels (don't trust the dealer to have filled it up correctly). Could it be an issue with one of the solenoids on the valve body?
Both times this happened, it was on tune 4 of 5, have no intention of even checking out what 5 can do until the trans was/ is rebuilt.
Any help/ advice is greatly appreciated
2004 Chev 2500HD LB7 238K and counting
2" leveling keys on front, 1.5" block level to the rear, Fass 95 fuel pump, +50 HP Injectors, Banks Big Head waste gate, Banks cold air intake with scoop, Profab air horn, mishimoto thermostats (-1 deg), PPE upper and lower radiator hoses, PPE Deep Trans Pan, Fleece trans cooler lines, MBRP 4" inch exhaust and quiet muffler, MBRP Intercooler pipes- driver and passenger, fleece tie rod sleeves, LDS 64mm Super Core, EFILive by PPEI