1999 Chevy Astro P1870 code - hard shift from 1st to 2nd

1999 CHEVROLET ASTRO

15,000 MILES • 6 CYL • 2WD • AUTOMATIC

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I just replaced the valve body. Now the hard shift from 1st to 2nd happens even when the vehicle is cold. I no longer get the P1870 code, in fact I don't receive an error code at all. What could the problem be?

Dec 1, 2009 at 10:42 PM

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