Ford Repair Questions? Ask a Mechanic for Answers ASAP
This transaxle is the CD4E 4 speed. If the terrain or throttle pressure are not changing much, it would be odd to shift often from 3rd to 4th and back. It may be a incorrect reading throttle position sensor that a scan tool can monitor. It may be the torque converter clutch slipping. I would drain the trans oil. Add*****it for one day, then drain and fill it again, but this time add a bottle of LUBEGARD. If its the converter, then this should resolve it within 50 miles.
You want a excellent 5 star answer & I would like to be rated the same for providing it. Consider I don't know your skill level & I can't see, smell, hear, or touch the vehicle. It may take a few back and forth replies. Try your best to respond with good detail so I can do the same. I normally log in at 3pm and work late. A rating is required. Your rating me, what I type. I am not an employee of this website, nor have control over the fees or the time it took to get a response. If you rate negative or not at all you still paid, but I get nothing. I want you pleased with me and my efforts, so let me know if your experience here has come up short.