Just working on one now and the transgo shift kit saya "There's two ECM solenoid firing strategies and two valve bodies. RF-F3 fits 93-96. RF-F6 fits 96 up. An F6 on 93-96 causes 3rd gear start in "1". It feels like a bind up. F3 on 97 up will cause upshifts f... Login to read more.