Lazy shifts on 1991 M30

[91M30]

My wife's 1991 M30 is slow to do a 2-3 shift or to lock up into overdrive; i.e., if throttle is held steady to hold RPM at 3000, it will not shift unless you back off very slightly on the throttle. The car only has about 60,000 miles. I've done a transmission flush, but it didn't change anything. Is this normal? If not, what could be the cause? Speed sensor?

[alternate_morph]

yea, i have to do the same thing to make mine shift. I usually accelerate smoothly up to 4000 rpm, then slightly release the gas pedal and let it shift to next gear. by the time it shift i'm already going like 55 mph...in like 6 secs...

[91M30]

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