In order of probability: Low or incorrect fluid, over-revving engine while shifting, valve body issues (including solenoid failures)
A 1992 Oldsmobile may not shift out of park because the transmission is stuck. Check to transmission fluid to ensure it is at the proper level.
Depends. Usually low or dirty fluid. Get it checked by a professional.
If your Oldsmobile Alero will not shift into overdrive, the transmission may have froze up. Check the fluid levels to determine if you are low on fluid.
The gears in your transmission may be sticking or worn out. This would cause your transmission to not be able to shift.
Allison transmission not shifting
Leaky transmission lines would cause the fluid level to drop and eventually cause the transmission not to shift and go.
You would have to replace the whole thing, it only about $30 its a locking pin that looks like a staple pull it out and it should come off....... easy do it your self
what would transmission not to shift in to overdrive
A bad transmission gear can cause your 1999 Nissan frontier to shift hard. Low transmission fluid can also cause the transmission to shift hard.
The 2000 Oldsmobile Alero shift solenoid is located on the top of the transmission. The shift solenoid can be access by removing the inside shifter console.
There are several things that can cause your Honda Accord station wagon automatic transmission not to shift down. The most common cause is low transmission fluid.
It's probably a problem with your catalytic converter.