dont drive in 5th lol
could be the modulator valve has went bad !
may be a bad or worn ring and pinion gear axel brgs' or low gear oil
Vacuum leak, low compression, burnt valves, low fuel pressure, weak spark, bad transmission....
When the computer detects a malfunction it will default into second gear only. Check the codes and that will give you an idea of causes.
Could be a bad vacuum line, low on fluid, or a bad 700r4 trani
likely the egr valve and /or sensor is bad
If your combo van is jumping out of gear and won't engage fifth gear, it could be due to a worn or damaged gear selector mechanism, a faulty clutch, or issues within the transmission itself, such as worn synchronizers or gears. Additionally, low transmission fluid levels or contamination can lead to shifting problems. It's advisable to have a professional mechanic inspect the transmission to diagnose and fix the issue properly.
Idling too low or a bad lock-up torque converter solenoid.
well on my truck i have 4 gears low 123, and low gear is my granny gear because it goes very slow. in an automatic your 1 gear or your L gear is your granny gear
Yes
Transmission. If an Automatic trans and car sounds like it is always in '1st' gear (engine rpm very high, has a lot of torque when you press or release the gas pedal) the shift cable has the trans in 1st or low gear, or there is a problem within the transmission preventing it from shifting (low fluid level, bad solenoid on or in the trans, bad shifter assembly)
The gear with the more number of teeth is bigger.