Change the Transmission Fluid and filter. If you see no improvement, take it to a transmission shop. We had a similar problem, and it ended up being a sensor in the transmission. I have a 1998 v6 which started to do the same thing. I was told by the transmission shop this is not an uncommon problem with Ford products. We replaced sensors, servo, solenoid, etc., problem kept coming back. Last time it was a valve body repair. It's still doing it. Next step is a new tranny - more likely I'm gonna trade it in for a new Honda. Good luck!
If it is slipping in gear or any out of the ordinary rough shifting.
Standard transmission?, the clutch is slipping, probably beyond adjustment, replacement necessary.
most likely your transmission is slipping and usually is the onset of your transmission going
If it vibrates briefly only while shifting, it's probably the transmission slipping. If all other gears are shifting ok, you're about to loose the transmission.
if it is automatic the transmission could be slipping if manual the throttle could be sticking
More than likely the main cause is the transmission is slipping. This wouldn't happen while cold it may also be that the transmission needs fluid.
If the clutch is not slipping, I would say the transmission is fine, the engine may be the reason for the lack of power.
If your pressing your brake when shifting it could be the neutral and park sensor. Or the linkage. If its the linkage you might have problems with your transmission slipping and shifting by its self or into certain positions easyly than others.
The solenoid is an internal transmission problem. It causes slipping, non-shifting, hard or erratic shifts, overheating,?æas well as loss of one or more gears.?æ
check the CV joints or the transmission is slipping
The fluid will aerate, which will cause slipping, shuddering, etc..
The gearing may be bad, the tranny may be slipping, or the fluid and filter may simply need to be replaced. A bad filter and low or bad fluid can cause slipping or lack of shifting.