93 240 overdrive problem

[Tuggle]

Hello-

Sometimes my 1993 240 wagon doesn't go into 5th gear. But if I pull over and put the car in drive while holding the overdrive button in its fine. If I don't put it in gear that way, the car stays in 4th. Had the car for about 10 years, and it just started happening.

Thanks,
Walter Tuggle