Chevrolet 1500 Pickup Problem Report
Chevrolet 1500 Pickup Check Engine Light With Code P1870
The transmission may develop a harsh 1-2 shift and/or illumination of the Check Engine Light with code P1870 stored. This can be caused by wear of the bore for the TCC isolator and regulator valves in the valve body. This condition does not commonly occur until the transmission reaches normal operating temperature. If the valve body is worn, replacement will be necessary to correct this concern.
i just bought a 96 silverado. wont pass smog due to a p1870 code and i 'm trying to learn how to fix the problem . any help i can get would be appreciated - Visitor
tcc wont lock, harsh 1st to 2nd shift. after about 30-50 miles trans gets hot and wont shift past 2nd until it cools down. - Visitor
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