Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1988CAVALIER RS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSOVERHAUL & TESTING - 125C/3T40TRANSAXLE DISASSEMBLYSPEEDOMETER DRIVE GEAR/SPEED SENSOR & GOVERNOR ASSEMBLYINTERNAL TRANSAXLE SPEED SENSOR (ITSS)
1988 Chevrolet Cavalier RS, 4D Sedan, Standard
Internal Transaxle Speed Sensor (ITSS)
1988 Chevrolet Cavalier RS, 4D Sedan, StandardSECTION Internal Transaxle Speed Sensor (ITSS)
Remove speed sensor housing bolts, speed sensor housing and oil seal. Remove thrust bearing, speed sensor rotor and governor assembly. See Figure .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.