Transmission wont downshift

[White x]

I have a 99 explorer with a 4.0 sohc with auto trans. When im on the highway and i want to pass someone my trans will not downshift. The the most RPM that i will get is 3300. At a dead stop the motor still will not rev beyond 3300 or so. My normal acceraltion is only around 2000 rpm. I noticed this problem last night when i tried to pass someone. My abs light is lit up on my dash and i dont know if that is causing the rev limit or not. I would appreciate any help.

 

[Glacier991]

My guess is that somehow the computer won't let the engine over-rev. A downshift that might cause that would be electronically inhibited in that case.... so I guess the real Q is why is the puter limiting you? I'll do some research, but I bet Mr. Shorty already knows the answer. It is probably a bad input somewhere... I'm guessing the RABS speed sensor is lying. That IS used by the Powertrain Control Module (puter) to schedule shifts and vary EPC pressures. I'd start there.

 

[White x]

help

how do i go about checking those problems?

 

[TPLYNCH]

Could be a bad throttle position sensor or (if they still have these) stretched gas pedal cable.