Home Auto Repair 1997 GMC Pickup K1500 Internal Slipping Service Manual

1997 GMC Pickup K1500 Internal Slipping Service Manual

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Download 1997 GMC Pickup K1500 Internal Slipping Service Manual – SLIP CHECK PROCEDURE This procedure will assist in isolating what area of the transmission is causing your slip, either the TCC system or internal transmission components. After you have isolated the origin of the slip, then utilize the TCC System Symptom Table or the Internal Transmission Symptom Table of this bulletin for most common concerns. TO CHECK FOR A TCC SYSTEM CONCERN TCC slip can occur either hot or cold or in both conditions. First, perform the following test at cold transmission temperatures, then perform the same test at normal operating temperature. Ideal slip from the transmission with the TCC applied is 50 RPM or less under light to normal throttle, no heavy engine load or hard accelerating conditions. 1. Use the Tech II scan tool to monitor TCC slip while driving the vehicle in 4th gear at steady speed with the TCC commanded ON. 2. When the TCC is applied or released (release the TCC with brake pedal, not the scan tool – release the TCC by lightly applying the brake pedal while simultaneously maintaining a steady throttle position), the
slip speed should drop or rise 150 00 RPM. If the slip speed does not drop, then the DTC P1870 is being caused by the torque converter system.