2005 f-150 xlt won't go foward and is showing codes:P0720 and P2106. What are some things to check?
It was a sudden thing that happened. There was no early signs that anything was going out. almost like a light switch effect. The truck has 133,195 miles and has run great up until this point. I reset the codes and they stay off until I put the brake on and shift into drive while taking the rpms to about 2,000. Then it will shutter and the code lights come on. The"O/D off" light flashes in the cluster also while this is preformed. No leaks, fluid is perfect, and no whine or grind of any kind. Its got to be electronic I'm thinking. Any suggestions?