SKU: GMP19368611
MPN: 19368611
The Chevrolet Performance Transmission 4L65E is a remanufactured four-speed automatic overdrive unit built for rear-drive LS V8 swaps and replacements. Rated to handle up to 430 ft-lbs of torque per manufacturer specifications, it suits builders running performance cars, trucks, and SUVs that originally carried the 4L60E family or a stronger upgrade. The 4L65E shares the same case footprint as its predecessor but adds heavier internal components to take more power. For anyone sourcing a complete unit rather than piecing together a build from individual drivetrain parts, this is a ready-to-install foundation.
This unit is electronically controlled and uses a 30 input spline configuration mated to an aluminum case. The published gear ratios run 3.06 in first, 1.62 in second, 1.00 in third, and a 0.70 overdrive fourth. What separates the 4L65E from a standard 4L60E is the upgraded internals: five-pinion gearsets, heat-treated stator shaft splines, an induction-hardened turbine shaft, seven-plate clutch packs, a shot-peened output shaft, and revised valve body calibration. Those changes are why it carries the higher torque rating. Note that the transmission does not include a torque converter, so plan to source a matched converter separately. If you are rebuilding a high-mileage core instead, individual clutch components and an output shaft are stocked separately.
Builders dropping an LS into a project chassis or replacing a worn factory automatic behind a 5.3 or 6.0 will find this a direct path to a known-good unit backed by a General Motors limited 12-month warranty. It ships ready for installation, weighing roughly 250 lbs in its packaged crate, so plan for liftgate or forklift handling on delivery. Match it with the correct converter, cooler lines, and mounting hardware before install. Browse the full drivetrain catalog for the shift cables, yokes, and small parts that round out the job.
No. This remanufactured 4L65E ships without a torque converter, so you will need to source a converter matched to your engine, stall speed, and intended use. Confirm the input spline count and pilot dimensions on your converter match the transmission before installation.
The 4L65E is rated to handle up to 430 ft-lbs of torque per manufacturer specifications. The higher rating comes from upgraded internals like five-pinion gearsets, seven-plate clutch packs, an induction-hardened turbine shaft, and a shot-peened output shaft compared to a standard 4L60E.
This 4L65E is built for LS series V8 engines in rear-drive applications, including common 4.8, 5.3, and 6.0 swaps. It uses a 30 input spline configuration and an electronically controlled valve body, so it requires a compatible engine controller or standalone transmission controller.
The published gear ratios are 3.06 in first, 1.62 in second, 1.00 in third, and a 0.70 overdrive in fourth. The overdrive fourth gear lowers cruising RPM for highway driving while the deep first gear helps launch heavier vehicles.
It is a remanufactured unit rebuilt to handle higher torque than a stock 4L60E. It is backed by a General Motors limited 12-month warranty and arrives ready for installation once you add a matched torque converter and the correct cooler lines and mounting hardware.
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