[breeaad]

You may need to adjust your TV cable to get the 1-2 shift in the right rpm range. I recently had the identical problem, and adjusting the TV cable did the trick. Here's how to do it:

On the throttle body, there are three cables - two off the front, and one off the rear. The rear one is the TV cable. Remove the white plastic cover off the cable, directly behind where it attaches to the throttle body. After you remove this cover, you can adjust the cable. To adjust, get inside the vehicle and press the gas pedal to the floor. Have a second person put the white cove back on while the pedal is pressed in. This should get you very close to where you need to be. You can fine tune from there.

Hope that helps...