P0757 Chevrolet - 05 trailblazer

Question

My shop has replaced the solenoids and it drove fine for about 200 miles then started again in have 2 codes shift solenoid 1 and speed sensor 1 I have replaced both what's going on what's my next step here ?
It is intermittent like right now it's fine and it's only from 0-30 oonce I get passed 30 it's fine but sometimes at 60 it'll be at 2700 rpms so I have to drive it slower. Right now I'm at 60 and 1900 rpms

Answer 1

P0757 2-3 shift solenoid valve

When P0757 occurs there is only 3rd gear.there is no TCC, P0757 dealing with 2-3 shift valve and there no VSS when this code occurs , the foward sprag assembly is going to have to be looked into.