One problem related to automatic transmission gear indicator has been reported for the 2003 Toyota Tundra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota Tundra based on all problems reported for the 2003 Tundra.
Overdrive malfuncioned at 10,000 miles. Randomly the vehicle's overdrive transmission acts oppositely to what shown on the display screen. When "overdrive off" light is on, overdrive gear is still on - turn the overdrive swith on and "overdrive off" lights turns off but the vehicle is still on 3rd gear (overdrive off). Malfunction stops when the engine is stopped. Toyota states this caused by the customer clicking the overdrive switch quickly several times. This is incorrect statement, the overdrive malfunction happens even with one click. Toyota also states this is normal condition as it is designed and the vehicle is safe to drive. I suffer poor gas milage and unsafe condition by transmission acting unexpectedly when malfunction occurs. Engine speed goes up very high and noisy on highways when malfunction happens. Customer is concerned about engine wear from long driving.