i've had code 1400 for a couple of weeks and found its a bad evap selenoid. noticed right before it went bad that the trans was shifting kinda hard 2nd into 3rd, and i did a drain and refill last week, ( not a flush, but all new fluid ) and she seems to be shifting ok but not smoothly. last night when i went to leave from work i put her into reverse and she shifted a tad too fast and hard and kicked back. anything else to clean/check to help tranny out?? thanks>>>

 

gotta check drop resistor. See if thats in spec.

i know u dont wanna hear this...but your shift solenoids prolly the culprit. I have read on here ppl replacing them and the car shifting smooth.

Evap solenoid doesnt have anything to do with that tranny shifting.

 

EVAP anything has nothing to do with trans at all!

 

+1 On the shift solenoid.