A General Motors vehicle is being tested using a scan tool. The input speed and the output speed sensor read the same when at highway speed. Technician A says that the transmission/transaxle is in a gear where the ratio is 1:1. Technician B says that the torque converter clutch must be defective and not working. Which technician is correct?

Question

Quizplus · Accepted Answer

When the input and output speed sensors read the same at highway speed, it indicates that the transmission/transaxle is in a gear where the ratio is 1:1, which is typically the case in one of the higher gears, such as third or fourth gear in many transmissions. This does not necessarily indicate a defective torque converter clutch.

A General Motors Vehicle Is Being Tested Using a Scan