I have a 2002 Wrangler with 80,000 mls. I am the original owner. I have been trying to fix a 5 year old problem with accelerating up any incline. If the rpms drop below 2k I have to downshift to the next gear. I can push the pedal all the way to the floor with no response. Going down an incline is fine. Also it's all I can do to reach a speed over 70mph. Any thoughts.