OSKYUO 4L60E/4L65E/4L70E Transmission Shift Solenoid Set A (1-2) & B (2-3) — Direct-Fit, Metal Construction

OSKYUO 4L60E/4L65E/4L70E transmission shift solenoids A (1-2) and B (2-3) are direct-fit replacement valves engineered to restore proper gear shifting and hydraulic control in compatible GM automatic transmissions.

This pair of transmission shift solenoids fits many General Motors vehicles equipped with the 4L60E family (4L60E, 4L65E, 4L70E) and replaces multiple OEM part numbers. Manufactured from durable metal with precision tolerances, the two solenoids are designed for reliable operation in the transmission valve body, helping the transmission manage gear changes and hydraulic circuits. The set is intended for routine replacement, repair projects, or when diagnostic trouble codes indicate solenoid faults.

Which vehicles and OEM numbers does this solenoid set fit?

These solenoids are compatible with a broad range of GM vehicles from the mid-1990s through early 2010s. They replace many original equipment part numbers used across Chevrolet, GMC, and Hummer models.

• Examples: Chevrolet Astro, Colorado, Express 1500, Impala, S10, Silverado 1500, Tahoe.
• GMC coverage: Canyon, Jimmy, Sonoma, Yukon plus H2 and H3 models.
• Replaces OEM numbers: 24230298, 10478120, 10478131, 24236521 and others listed by the manufacturer.
• Always cross-check vehicle year and transmission code before ordering.

How will these solenoids affect shifting performance?

Replacing failing shift solenoids can correct delayed, harsh, or incorrect gear changes by restoring the transmission's hydraulic control. New solenoids help the transmission respond properly to electronic commands, improving drivability and reducing erratic shift behavior.

• Targets common symptoms like slipping, gear hunting, or limp-home mode.
• Restores consistent pressure control between 1–2 and 2–3 shift events.
• Works with the vehicle’s original electronic control signals when installed correctly.
• May clear related transmission diagnostic trouble codes after repair.

What are the installation steps and do I need special tools?

Installation is straightforward for a competent DIYer or a professional technician: remove the pan and valve body access, replace the old solenoids with the new units, then reassemble with a clean filter and correct fluid level. No unique proprietary tools are required, but a basic mechanic's toolset and service manual guidance ensure correct torque and fluid fill.

• Remove transmission pan and fluid, support vehicle safely.
• Unbolt valve body area, swap solenoids, and reconnect wiring harnesses.
• Replace filter and gasket, refill with specified ATF, and follow bleed/learn procedures if required.
• Refer to vehicle-specific videos or manuals for torque values and shift adaption steps.

What durability and warranty does OSKYUO provide?

Each solenoid is constructed from quality metal for stable performance under normal operating conditions. OSKYUO backs the parts with a 12-month warranty and offers customer support to help address fitment or functional questions.

• Made from durable metal components for long-term use.
• 12-month full warranty with responsive customer service.
• Support available for installation questions and troubleshooting.
• Recommended to inspect valve body and harness for related issues when replacing solenoids.

Who is this for: This solenoid pair is aimed at owners, mechanics, and transmission shops working on GM vehicles with 4L60E-family transmissions who want a reliable, cost-effective replacement for worn or faulty shift solenoids. It suits DIY mechanics familiar with transmission service, professional technicians performing valve body repairs, and fleet managers maintaining older Chevrolet, GMC, or Hummer models requiring proven replacement parts.