Maaac1789
Full Access Member
- Joined
- Mar 26, 2017
- Posts
- 147
- Reaction score
- 93
- Location
- Booneville, MS
- First Name
- Brent
- Truck Year
- 1983
- Truck Model
- K10
- Engine Size
- 5.3
Hey guys. Need some help. Long story short: I have a 1983 K10 that I 5.3 swapped last year. I initially used the 700r4 behind it, but it didn’t hold up. I swapped in a freshly rebuilt 4L80E, and had my programmer do a segment swap with HP Tuners, but we can get it to shift on its own. He can command it with HPT and it shifts, and it will do a WOT shift at around 40mph, but won’t ahift by itself. I checked continuity between the PCM and the tranny plug, front and rear speed sensors, and the TPS. All good. I’m using the NP 208 t case and a Dakota Digital pass through VSS. We changed a setting and got the mph right in HPT, but still no shift. Any ideas? Thanks