SKU: GMP19368611
MPN: 19368611
The Chevrolet Performance 4L65E transmission delivers serious drivetrain capability for LS-powered builds. This remanufactured four-speed automatic handles up to 430 lb-ft of torque, making it a direct fit for small-block and LS series V8 engines in rear-wheel-drive configurations. The 4L65E sits above the standard 4L60E in GM's transmission hierarchy, featuring upgraded internals that justify its place in performance and heavy-duty applications. We stock this unit for builders who need factory-backed reliability without sourcing from junkyards or questionable rebuilders.
Chevrolet Performance addressed the weak points of earlier four-speed automatics with specific upgrades throughout this unit. Five-pinion gearsets distribute load across more contact surfaces than the four-pinion design found in base transmissions. The turbine shaft receives induction hardening, while the output shaft undergoes shot peening to improve fatigue resistance. Seven-plate clutch packs replace lighter-duty configurations, and heat-treated stator shaft splines prevent the premature wear that plagues high-torque applications. Gear ratios run 3.06 in first, 1.62 in second, 1.00 in third, and 0.70 in overdrive—delivering strong acceleration off the line with highway-friendly cruising in fourth. The revised valve body calibration improves shift quality and response. Note that this transmission does not include a torque converter, allowing builders to select a stall speed matched to their combination.
This 4L65E fits the gap between stock replacement and full race builds. It handles the output of cammed LS engines, supercharged street trucks, and weekend drag cars without requiring a complete standalone controller in most swap scenarios. The 30-spline input works with common bellhousing adapters and LS flywheels. General Motors backs this remanufactured unit with a 12-month limited warranty. We carry related parts and accessories to complete your drivetrain project, and our firearms selection remains Florida's destination for FFL transfers and tactical gear.
The 4L65E features five-pinion gearsets instead of four-pinion, seven-plate clutch packs, an induction-hardened turbine shaft, and a shot-peened output shaft. These upgrades increase torque capacity to 430 lb-ft compared to approximately 360 lb-ft for the standard 4L60E. The 4L65E was factory-installed in higher-output GM vehicles like the Corvette and Silverado SS.
No, this Chevrolet Performance remanufactured 4L65E does not include a torque converter. This allows builders to select a converter with the appropriate stall speed for their specific engine combination, whether that's a mild street build or a higher-stall setup for forced induction or aggressive camshaft profiles.
The 4L65E is designed for GM LS series V8 engines, including the LS1, LS2, LS3, LS6, and truck variants like the LQ4 and LQ9. The 30-spline input shaft works with standard LS flywheels and flexplates. The transmission bolts directly to LS bellhousing patterns without adapters.
General Motors provides a 12-month limited warranty on this remanufactured transmission. This factory warranty covers defects in materials and workmanship, giving builders confidence in the unit's reliability for street and performance applications.
The 4L65E uses gear ratios of 3.06:1 in first, 1.62:1 in second, 1.00:1 in third (direct drive), and 0.70:1 in fourth (overdrive). This ratio spread provides strong low-end acceleration while the overdrive fourth gear reduces engine RPM for improved fuel economy and highway cruising.
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