OSKYUO 4L60E/4L65E/4L70E Transmission Shift Solenoids A & B (1-2 / 2-3) Direct-Fit Metal Replacements

OSKYUO 4L60E/4L65E/4L70E Transmission Shift Solenoid A (1-2) and B (2-3) are direct-fit replacement solenoids engineered to restore smooth gear changes in compatible GM automatic transmissions.

If your Chevy or GMC equipped with a 4L60E/4L65E/4L70E transmission shows erratic shifting, delayed engagement, or stored transmission codes related to shift solenoids, these OSKYUO units provide an affordable, OEM-style alternative. Manufactured from durable metal, they are designed to meet the fitment and performance expectations for many GM models from the 1990s through the 2010s. Each solenoid corresponds to common OEM reference numbers such as 24230298, 10478120, 10478131 and others, simplifying parts matching during repair.

How will these solenoids affect shifting performance?

Replacing worn or faulty shift solenoids often reduces hesitation, hard shifts, or failure to shift between gears. OSKYUO solenoids help re-establish the hydraulic control signals the valve body uses to select 1-2 and 2-3 shifts, improving drivability when the transmission control system is otherwise healthy.

• Targets the A (1-2) and B (2-3) shift circuits in 4L60E/4L65E/4L70E transmissions.
• Restores correct hydraulic pressure control for smoother transitions.
• Direct-fit dimensions to match valve body ports for reliable sealing.
• Built from metal for wear resistance under operating temperatures.

Which vehicles and OEM numbers are these solenoids compatible with?

These solenoids fit a wide range of GM SUVs, trucks and vans that use the 4L60E family of transmissions. Check your vehicle’s VIN or existing part numbers against the listed references to confirm compatibility before purchase.

• Common fitments include Chevy Astro, Colorado, Express, Impala, S10, Silverado, Tahoe and GMC Yukon, Canyon, Jimmy, Sonoma, plus H2/H3 models.
• Often cross-referenced with OEM numbers: 24230298, 10478120, 10478131, 24236521 and variants.
• Also matches aftermarket identifiers like TCS17, K77945, 52-0348, 77945 and D74421.
• Works across model years primarily from the early 1990s through around 2014; always verify exact match.

How difficult is installation and what should I prepare?

Installation is straightforward for anyone comfortable with basic transmission service and valve body access. The solenoids have a simple mechanical design; removing the old units and seating the new ones usually requires only common hand tools.

• Recommended tools: socket set, torque wrench, screwdrivers, and vehicle lift or jack stands for safe access.
• Drain pan for transmission fluid and clean workspace to avoid contamination.
• Follow torque specs and use a new gasket or pan seal if you remove the valve body.
• Refer to reputable video tutorials if you need step-by-step visual guidance.

Who is this for? OSKYUO 4L60E/4L65E/4L70E shift solenoids are intended for DIY mechanics, independent shops, and fleet maintainers looking to replace failed A (1-2) and B (2-3) solenoids with a cost-effective option that mirrors OEM fit and function. They suit owners of mid-1990s to early-2010s Chevrolet and GMC vehicles who need a reliable replacement part and a 12-month warranty for peace of mind. Before ordering, confirm your transmission family and cross-reference included OEM numbers—such as 24230298 or 10478120—to ensure correct fitment. If you run into difficulties, OSKYUO customer service is available to assist within standard business hours.