Ford Freestar hesitation and jumping issue from 1st to 2nd gear when hot on Ford Freestar

Some Ford Freestar owners report experiencing hesitation and jumping from 1st to 2nd gear when the transmission is hot. This issue may be attributed to several factors, including potential failure of the torque converter output shaft splines, which has been a recall concern for some models. Additionally, a faulty throttle position sensor could be affecting transmission shifting, while internal parts breakdown may indicate a need for a rebuilt torque converter. Furthermore, problems with fuel delivery, injectors, or the Mass Air Flow (MAF) sensor could also contribute to these transmission issues. It is advisable for owners to have their vehicles inspected by a qualified mechanic to diagnose and address these concerns effectively.