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Modified 4L80E Extension Housing

The signal needed to drive the ePlace computer comes from the 4L80E Vehicle Speed Sensor (VSS). If the 4L80E is being retrofitted into a vehicle that has a mechanical speedometer, the problem of how to drive this cable driven speedometer comes up. The 4L80E extension housing does not have a bore to install a mechanical speedometer driver into as we can see in the example directly below.

Solution: AutoTrans builds and supplies a modified 4L80E transmission rear extension housing that accepts a mechanical speedometer driver.