2000 Jeep Grand cherokee code P0731 , P0732 , P0734 ,they are incorrect gear ratio's

[jimmy0685]

I would appreciate a idea from anyone as to what part this may refer to . It shifts hard, it doesn't shift any futher than 3rd, except at apx. 52 or53 mph it will jump in 4th for about 1 second then jump back down to 3rd. I have replaced the flywheel positioning sensor , & the speed sensor on the drivers side of the transmission (I don't know if thats the only one). I know sometimes new parts are bad and it could still be one of these, but is there anything else anyone can suggest ? Thanks to everyone who gives this thought ! update-- problem solved--replaced both speed sensors

[Bob D.]

It's a transmission related code, maybe related to the torque converter or speed sensors.
Does it have any driveability problems? If not, check for clean/proper fluid levels and reset the codes to see if they recur.