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  1. The Blue Dragon

    [4L60E] - Replace Valve Body Without Removing Transmission?

    Just bought a '97 C1500 with 242k on the clock. Truck drives and shift beautifully. If I drive it hard on the highway, the next time I take off from a stop it will BANG the 1-2 shift. Throws the P1870 code. Shutting off the truck and restarting it will "fix" the problem until I drive it hard...
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