Remove Car Remove Electronics Remove Hydraulics
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Hydraulic Systems in Auto Repair: Tools and Techniques

CATI

Hydraulic systems are behind some of the most essential functions in automotive repair, whether lifting a vehicle in the shop or bringing a car to a stop on the highway. Thats why hydraulic training is a key part of becoming a professional technician. As cars have evolved, so have the systems that power them.

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Limited-Slip Differentials And Diagnostics

Brake & Front End

If you have ever driven a car or truck with a fully locked differential around a tight corner or tried to get a car with an open differential out of a snowbank, you know about the benefits of a limited-slip differential. These can be found on performance cars and off-road trucks. The two wheels are connected using spider gears.

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Simplifying AWD Systems

Brake & Front End

The brake hydraulic control module on these vehicles has at least 12 valves. If the car or truck is accelerating hard from a stop, the ETS will apply the brakes independently to prevent slipping. These differentials can act like a locking, limited-slip or open differential with only a change of the electronically controlled clutches.

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Electrical vs. Hydraulic Power Steering

Alex's Autohaus

Power steering is now offered in a few different ways; hydraulic, electrical, and more recently, drive-by-wire. Continue reading to learn more about power steering, its history, reliability and repairs, and how each type impacts the driving dynamics of a car. Hydraulic steering is not without flaws though.

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Air/Active Suspension Diagnostics

Tomorrow's Technician

These systems can optimize the air springs and adjustable valving in the hydraulic dampener to give the best ride while not compromising handling and safety. When the car is first started, observe whether the self-checks happen. Most air ride and chassis codes are set in the first minute after the car is started.

Vehicle 130
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Average Transmission Valve Body Replacement Cost (2025)

RepairSmith

If your cars gear shifts feel rougher than your Monday mornings, a failing transmission valve body could be the culprit. This covers: Parts cost: $100 to $2,500 Labor cost : $300 to $1,000 NOTE: Only automatic transmission cars have a valve body. Use jack stands to safely raise the car for access to the transmission.

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Parking Brake Malfunction: 12 Main Causes + How to Reset It

RepairSmith

Malfunctioning electronic control unit (ECU): If the ECU fails due to an electrical issue like low voltage, the electronic parking brake system won’t engage efficiently. Faulty sensors: The electronic parking brake relies on sensors to monitor brake engagement, position, and hydraulic pressure.