45RFE GURU's Need a little direction on diagnosis
HI all, i have an 2000 G/C with the 4.7/45rfe tranny. its been acting a little strange lately and im not sure where i should start with diagnosis. ive done a bunch of searching but im still a little stuck.
When the truck is cold, ie right away in the morning ect, it shifts perfect. but once it gets up to operating temp, the 2-3 shift gets rough. its not a clunk or a bang, its hard to explain. almost feels like the sound you get when you come to a stop with wet brakes. it only does it at lighter throttle application, if i give the truck more than 1/2 throttle it shifts fine. i tested the TPS and that came up fine. i have no codes at all. Im thinking it could be a speed sensor issue but i dont want to throw parts at it and hope for the best. any insight/tips would be a great help. Also the truck has a transgo shift kit in it (no resistor on the pressure line), and the fluid was changed about 10k ago. fluid level is good, and it smells like it should.