Hi I have a 04 f150 heritage with the 4.2L v6 aoutomatic trans with 41k on it. The transmission down shifts to drive fine but takes awhile to shift back into overdrive on the highway, when it does it shifts hard at times. Also seems sluggish up-hill. The trans was just serviced less than 1k miles ago and the fluid level is fine.
Anyone have any problems with their trucks or know what could cause this to happen.
Thanks

 

My Transmission Did This Exact Same Thing... It Could be your speed sensor on the tranny.. the mass air flow sensor... the throttle postioning sensor... or in my case ur overdrive will go in the nxt couple thousand miles... my truck has no overdrive as of now....