I'd check the throttle cable or the kickdown cable. That squeal you heard in the engine compartment might have been a cable breaking.
Could be anything from an engine management problem to the transmission failing
There is a problem with the transmission, And the computer see's it and put the transmission into the FAIL SAFE MODE to stop it from blowing apart.You need to quit driving it and get it to a transmission shop ASAP.
There can be several things that will an automatic transmission not to work properly. The most common cause is a lack of transmission fluid. Broken shifting linkage can also cause the problem.
It depends on what the problem is. From your question it is obvious you need to have it looked at by a professional.
Could be a transmission problem, assuming an automatic transmission.
That indicates a problem with your automatic transmission.
The real problem is manually shifting from gear to gear with an automatic transmission. If you are referring to the automatic upshift, there may be a problem with the EGR system or vacuum system.
Most cars this is not a problem, the engines are identical.
What can cause the RPM on a car to jump while driving is a problem with the transmission. It could be a problem with the gears in the transmission itself.
My 1997 Dodge Avenger automatic transmission stays in 2nd gear a the time. What seams to be the problem?
parking pawl
Manual transmission: Clutch Automatic transmission: possibly low transmission fluid