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Old 12-20-2005, 10:34 PM
2000CAYukon 2000CAYukon is offline
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Re: 1997 Weird Tranny

Is the check engine light on? You should probably check to see if there are any codes stored in the PCM.

Shifting from 2 to 3 is based on speed, throttle position and engine load. Assuming that the criteria has been met, a stuck (or sticking) solenoid or shift valve could be your problem.

The solenoids can be looked at with the pan off, but the valve body should come out if the shift valves need to be inspected.

Good luck.

//2000CAYukon
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