Direct-acting solenoid valve WL3242

hydraulicoilmetal

Overview
A gearbox oil control solenoid is an electromechanical valve used in automatic transmission systems to regulate transmission oil flow and pressure according to commands from the transmission control module. It controls movement of transmission fluid inside the automatic gearbox to enable smooth gear shifting and clutch operation. The solenoid generates magnetic flux in the coil to shift a valve spool or plunger, regulating fluid paths and hydraulic pressure.

Function and Construction
The gearbox oil control solenoid provides rapid response, hydraulic pressure regulation, and reliable oil flow control. Typical construction includes a precision electromagnetic coil, a precisely machined valve spool, springs, oil-resistant seal rings, and a heat-resistant housing. High-quality (OEM) solenoids feature stable electrical resistance, correct connectors, and have passed tests for resistance accuracy, temperature resistance, leakage, and performance reliability.

Benefits

• Smoother gear shifting and clutch engagement.
• Improved transmission efficiency and fuel economy.
• Reduced transmission wear and longer service life.
• Fast response and precise hydraulic control for CVT, DCT and electronic automatic transmissions.

Applications
Used in passenger cars, SUVs, trucks, hybrid vehicles and industrial automatic transmission systems. Solenoids are applied across automatic valve bodies and are integral to systems that require precise hydraulic channel control for shifting, torque converter lockup, and clutch engagement in automotive and industrial transmissions.

Symptoms of Solenoid Failure

• Rough idle, stalling, or unstable idling.
• Delayed or hard gear changes; slipping gears.
• Loss of engine acceleration or reduced power output.
• Increased fuel consumption.
• Check Engine light or specific transmission trouble codes.
• Engine knock/detonation related to timing issues.
• Engine misfires during acceleration.
• Transmission overheating or abnormal noises (clunks, grinding, whining).

Troubleshooting Summary
Common causes of failure include dirty/contaminated transmission fluid that clogs hydraulic passages, coil windings burnout or electrical failure, metal particle contamination from internal wear, overheating and fluid deterioration. Diagnostics typically include OBD-II trouble-code reading, checking transmission fluid condition, measuring solenoid resistance, verifying electrical connections and fuses, and inspecting valve-body hydraulic passages. Remedies range from fluid replacement and valve-body flushing to solenoid replacement and, if contaminated, a full transmission overhaul.

Advantages & Disadvantages

• Advantages: precise pressure/flow control, smoother shifting, improved comfort and fuel economy, OEM-replacement compatibility and long-term reliability when produced to high standards.
• Disadvantages: vulnerability to contamination, overheating and electrical wear; diagnosing/replacing may require specialist tools; OEM parts can be more expensive than some aftermarket options.

Selection Guidelines
To select a proper gearbox oil control solenoid, identify the correct OEM part number and transmission model, verify operating voltage and coil resistance, confirm connector shape and mechanical fit, and check material quality (machined metal housing, copper coils, oil- and heat-resistant seals). Ensure supplier testing (resistance, leakage, durability, temperature tests) and consider operating environment, transmission load and hydraulic pressure requirements for industrial applications.

Technical datasheet (key rows extracted)
Brand: Weilong Technology
Model Number: WL3242
Rated Voltage (V): DC12V
Rated Power (W): 12 W
Work Mode: Direct Action Valve
Holding Force (N): 2.5 N
Stroke (mm): 2 MM Customized
Working Duty: Continuous
Service Life: 50 Thousand Times
Certification: CE, RoHS, ISO9001
Material: Superior Magnet Iron
Lead Wire Length (mm): 220 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-100°C
Duty Cycle: 1-100%
Thread Depth (mm): /
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

Specifications / Technical characteristics

• Model: WL3242
• Brand: Weilong Technology
• Operating voltage: DC 12 V
• Rated power: 12 W
• Work mode: Direct action valve
• Stroke: 2 mm (customizable)
• Holding force: 2.5 N
• Working duty: Continuous
• Service life (typical): 50,000 cycles
• Insulation class: B; Hi-Pot: AC 600V 50/60Hz 2s
• Lead wire length: 220 mm
• Working temperature range: -10°C to 100°C
• Warranty: 1 year
• MOQ: 1000 pcs; Supply ability: 5,000 pcs/week; Typical delivery: 30 days