Autobox locks itself in 4.th gear!
Hi! Car is 166 2,4jtd with automatic gear. Now it gets locked in 4.th gear when cruising in aprox 80 km/t (in 5.th gear)and a red lamp appears. Then I can stop the car and turn off engine, then start again and drive off and all is fine, for a while, then it appears again. If I choose manual mode then it seems I can aviod the problem if I do not get the rev under 2000, so if I drive faster than 90km/t in fifth gear then its ok. A autobox specialist worksop tells me this box is a AW55-50 which they know wery well and the problem can be vear in the valvehouse, but a diagnose is the first ting to do.
Anyone had this problem?