Transmission dose not get overdrive/high gear. Speedometer low false speed. on 2000 Chrysler Sebring

My car does not shift onto high gear while meter shows I am traveling only 30 mph. But I am going 55+ mph.3000 rpm Was told by transmission that until false reading issue is resolved, the trany will continue to not know it should shift. I stuck in two new speed sensors. The speed sensor incoming and out going sensor. Still not working.

by in Magnolia, TX on December 05, 2012
1 answer 1 comment
ANSWER by , December 05, 2012
poss bad speed sensor,get free diag and est from aamco
COMMENT by , December 05, 2012
Replaced speed sensor. both incoming sensor and out going. Still reading 30 mph at over 60 mph