Why might a transmission not shift?
what type of transmission? for 4L60E trans, try changing the A & B solenoid before giving up on ur current trans, these are located in the pan, they are black and sit side by side, a spring clip holds them in place. cost bout $50 AnswerIf it has a modulator valve gone bad - this will prevent it from shifting. Call Auto zone and ask if there is this type of valve for your transmission.
Check the fluid level. Check for trouble codes with a scanner, Check shift linkage/vaccum lines.
What would cause my transmission to automatically shift out of overdrive while driving on interstate?
What would cause a wind star's gear shift not to move after it was started it seems to be stuck in park?
What causes the automatic transmission to shift hard from first to second gear on a 1999 Nissan Frontier?
Your At Oil light reports the condition of the transmission and its fluid. Some times this problem can be fixed by changing your transmission fluid and assuring that the levels are correct when you refill the transmission. We hope that this simple routine maintenance we fix the problem, but it might not. You could have a "burnt" or worn out Central differential in your transmission. This is the part that pumps your fluid throughout the…