FourEightZero
OBS Enthusiast
93 K1500 5.7L - 4L60E
Getting early shifting into OD while driving only ~25MPH in my neighborhood. Engine lugs and wont downshift until I almost come to a complete stop.
Tranny shop that rebuilt it said it is fine and they cant figure out what's wrong.
Started firing the parts cannon. Picked up another 16168625 PCM, popped the tuned chip in it, replaced TPS.. still shifts early.
Ran a datalog on TunerPro RT and did a transmission data recording.
Noticed that the computer was showing I was going 60 something MPH in my neighborhood when I was actually going about half that.
My Dakota Digital IC/speedo was showing 25-30 at top speed.
Is it possible that the computer thinks I'm in 4 low when I'm not? Anything else I need to check?
Getting early shifting into OD while driving only ~25MPH in my neighborhood. Engine lugs and wont downshift until I almost come to a complete stop.
Tranny shop that rebuilt it said it is fine and they cant figure out what's wrong.
Started firing the parts cannon. Picked up another 16168625 PCM, popped the tuned chip in it, replaced TPS.. still shifts early.
Ran a datalog on TunerPro RT and did a transmission data recording.
Noticed that the computer was showing I was going 60 something MPH in my neighborhood when I was actually going about half that.
My Dakota Digital IC/speedo was showing 25-30 at top speed.
Is it possible that the computer thinks I'm in 4 low when I'm not? Anything else I need to check?