The transmission could be malfunctioning due to control faults or low transmission fluid level.
Check the fluid level and condition. If fluids level is correct are bright red, then it is most likely a control fault such as a solenoid is stickingetc.
Get a free scan done at Autozone to see if any fault codes are present. Let me know the exact trouble code so we can understand what is happening.
Hope it is nothing serious.
Friday, August 13th, 2010 AT 1:13 PM