Gear ratio error codes are stored by your vehicle’s computer when the transmission’s actual gear does not match the gear the control system expected, based on engine speed and wheel speed. Many automatic transmissions compare these two signals constantly. Most drivers notice this problem as slipping, delayed engagement, flaring between gears, or the car entering … Read more
Transmission fault codes are short alphanumeric messages that an automatic or automated manual transmission control module stores when it detects a problem with a sensor, solenoid, circuit or hydraulic condition. Many owners first encounter them through a warning light or a shop report, and the codes can look intimidating at first glance. This guide explains … Read more
Transmission limp mode is a protective setting that many modern vehicles enter when the control system detects a fault it considers risky for the gearbox. The car usually holds one gear, limits engine power, and may warn you on the dashboard. This article explains what limp mode does, what commonly triggers it, and how to … Read more
Transmission wiring problems can cause harsh shifts, sudden gear loss, or a warning light, yet the symptoms often mimic mechanical failures. Many owners assume the gearbox itself is failing when the real fault is a damaged connector, a corroded pin, or a cut wire between the controller and the sensors. Modern automatic transmissions rely on … Read more
Faulty speed sensor symptoms can show up as erratic speedometer readings, rough shifting, or a warning light that appears without warning. Modern vehicles rely on several speed signals to run the transmission, anti-lock brakes, and stability systems, so one failing sensor can affect more than the gauge on your dashboard. This guide explains what these … Read more
Transmission sensor problems are among the more common reasons an automatic gearbox starts to shift poorly, and they can be surprisingly hard to pin down. A sensor is a small electronic part that reports a measurement, such as speed or position, to the car’s computer. This guide explains how these faults usually appear, what tends … Read more
Transmission control module faults are problems with the electronic computer that decides when your automatic transmission shifts, how firmly it engages, and when it locks the torque converter. When this module or its wiring fails, drivers often notice harsh shifts, delayed engagement, or a warning light. This guide explains what the module does and how … Read more
Shift solenoid failure symptoms usually appear as changes in how an automatic transmission changes gears, such as harsh jolts, delayed engagement, or a car that seems stuck in one gear. Shift solenoids are small electrically operated valves that direct transmission fluid to the clutches and bands that select each gear. Because many of these symptoms … Read more
Valve body problems are one of the less familiar causes of automatic transmission trouble, yet they can change how your car shifts. The valve body is a hydraulic control unit inside the transmission that directs fluid to the clutches and bands that select each gear. When it does not work correctly, shifts can feel wrong, … Read more
Torque converter lockup problems affect how efficiently an automatic transmission transfers engine power to the wheels, and they often show up as vibration, shudder, or unusual engine behavior at steady highway speeds. Many owners first notice these issues as a faint buzz, a surging feeling, or a change in fuel economy rather than an outright … Read more