Overdrive Problem

[Kijimuna]

My 93 shifts into overdrive at lower gears/speeds but won't kick in at speeds exceeding 55/60 mph. RPM runs 3200-3500 any thoughts?

 

[piano39073]

My 93 shifts into overdrive at lower gears/speeds but won't kick in at speeds exceeding 55/60 mph. RPM runs 3200-3500 any thoughts?

Same prob on my 94.. I was told to change out the fluid and filter..told me the transmission was operating at a higher pressure making it think it needs to shift to a higher gear (too quickly) which is what mine does.. In OD by 30-35.. The man giving the advice also told me to drain the torque converter..I'm opting in to changing the fluid and filter twice..a pain and expensive..I'm not equipped to do that kind of work..he also suggested on the final change to replace one of my quarts with TRANS X ... Good luck!