What are the different symptoms of the 94 F150 auto trans malfunctioning of the MLP sensor and the transmission range sensor? Will both account for severe hard upshifting after 20 min of local driving? Will both give code? No code given but always causes speed sensor to give one. Replaced speed sensor but not cause. Could bad seals also cause such after trans fluid heats up and then is incorrectly directed,(due to worn seal) causing module to not know what gear truck is actually in? Thank you, heinz