Holding solenoid WL0741

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Overview
The WL0741 gear shift solenoid is a compact electromagnetic actuator designed to regulate hydraulic fluid flow in automatic transmissions. Controlled by the transmission control module (TCM) or engine control unit (ECU), it converts electrical signals into precise valve movements to enable gear selection in passenger cars, commercial vehicles, hybrids and performance applications.

Best Features

• Compact form factor for direct integration into valve bodies.
• Fast response and high positional accuracy for reliable shift timing.
• Durable electromagnetic coils and corrosion-resistant winding.
• Low power consumption and engineered tolerance to vibration and temperature variations.
• High-quality sealing to minimize oil leakage and extend maintenance intervals.

Product Overview (detailed)
The WL0741 delivers consistent actuation performance under automotive operating conditions. With a push-pull work mode and a 4 mm stroke (customizable), it provides controlled pressure modulation for clutch packs and pressure-control circuits. Robust materials and precision machining ensure repeatable valve travel and long service life in CVT, DCT and conventional automatic transmissions.

Applications

• Electronically controlled automatic transmissions (CVT, DCT, AT).
• Torque converter lock-up and pressure control valves.
• Passenger cars, commercial trucks, hybrids and electric vehicles.
• High-speed or performance shifting systems requiring rapid actuation.

Advantages

• Enables smooth, accurate gear engagement and improved drivability.
• Contributes to optimized fuel consumption and transmission efficiency.
• Compact footprint simplifies integration into modern valve bodies.
• Designed for continuous operation with extended service life.

Drawbacks

• Performance can degrade from overheating, hydraulic contamination, or prolonged extreme duty.
• Failure modes may include hard shifting, delayed engagement, slippage or limp-home behavior.
• Replacement can require valve body access and diagnostic tools.

Troubleshooting Summary

• Electrical checks: measure coil resistance and inspect wiring/connectors for opens or shorts.
• Fluid contamination: inspect and replace transmission fluid; clean hydraulic passages to prevent sticking.
• Overheating: verify operating conditions and fluid quality; excessive heat can damage insulation.
• Mechanical wear: inspect springs, seals and valve travel; replace when tolerance limits are exceeded.

Frequently Asked Questions (selected)

• What is an automotive gear shift solenoid? — A solenoid that receives commands from the TCM/ECU to modulate hydraulic flow to clutch packs or bands for gear selection; available as on/off or pulsed (variable force) types.
• What are common symptoms of solenoid failure? — Check engine/transmission warnings, harsh or delayed shifts, stuck gears, slipping or limp mode.
• Why do solenoids fail? — Typical causes include contamination, coil electrical failure, mechanical sticking from sludge, or wiring/corrosion issues.
• Can the solenoid be bench-tested? — Basic tests include measuring coil resistance and applying correct voltage to verify actuation; professional diagnostic tools recommended for accurate assessment.
• Is full transmission replacement required if a solenoid fails? — Not usually. Solenoids are serviceable, but replacement may require draining fluid and accessing the valve body; some modern modules integrate solenoids into larger assemblies.

Technical Specifications

• Brand: Weilong Technology
• Model Number: WL0741
• Rated Voltage: DC12V
• Rated Power: 7-10 W
• Work Mode: Push and Pull
• Holding Force: 2.5 N
• Stroke: 4 MM (customizable)
• Working Duty: Continuous
• Service Life: 200,000 cycles
• Certification: CE, RoHS, ISO9001
• Material: Superior Magnet Iron
• Lead Wire Length: 200 mm
• Install Style: Screw
• Tolerance of Dimension: +/- 0.1 mm
• Water-proof: None
• Insulation Class: B
• Hi-Pot Test: AC 600V 50/60Hz 2s
• Non-excitation Holding Force: 0
• Working Temperature: -10°C to 100°C
• Duty Cycle: 1-100%
• Payment Term: TT or LC at sight
• Sample Order: Yes
• Warranty: 1 Year
• MOQ: 1000 pcs
• Supply Ability: 5000 pcs per week
• Delivery Time: 30 Days
• Port of Loading: Shenzhen