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Chev transmission issue.

walleye29us
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walleye29us Enthusiast

walleye29us

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97 Chev Silverado 5.7 liter 4x4 177,000 miles. The tranny shifts fine when driving in town. When i get on the freeway for a bit and come to a stop, the tranny will SLAM INTO EVERY GEAR,,Until i pull over and shut the motor off for a couple minutes. Start it back up and it shifts normal again,,UNTIL I drive on the freeway again, then same thing again. Have any of you guys ever hear of such a thing? If so WHAT YA THINK IT COULD BE?

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Capt. H (Ret.) Rising Star

Capt. H (Ret.)

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Had sort of the same thing happen on a Chevrolet car and it turned out to be a valve in the transmission to the tune of $300 which was and still is a heck of a lot cheaper than a new tranny. Have it checked out by somebody that knows what they are doing. You aren't going to fix it by adding some miracle additive.

Mike

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mnmarlin Apprentice

mnmarlin

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As stated below its the torque converter apply valve in the transmission. Its a steel valve in an aluminum bore, and it will ear and leak after a while, resulting in lower fluid pressure to the converter lockup, then the converter slips and the ecm will raise the line pressure resulting in the extremely hard shifts. There is a kit available (I don't remember the name of the company off hand) that sleeves the aluminum bore, or the valve body can be replaced. Common issue on the 4l60E transmission.

Having a good shop fix the valve shouldn't be too expensive, maybe a couple hundred at most.

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