Transmission won't downshift when accelerator is pushed to floor but will downshift manually?

If I'm not mistaken this vehicle is equipped with a downshift cable. Make sure it is properly connected and is free of interference. Should be connected at the carburetor near the accelerator cable. Make sure it is actuated when the accelerator is pressed. You may also want to make sure if you have a vacuum line running to the tail end of the transmission that it is free of water from your steam cleaning.

Transmission will not downshift Troubleshooting:

  1. Check the cable for correct operation
  2. Check cable connection at Carburetor
  3. Check Cable Connection at transmission
  4. Check for proper adjustment of cable

Transmission will not down shift