Overview

GearStar GM 4L60E Level 4 Transmissions

GearStar GM high-performance transmissions are built to meet the horsepower, torque, and rear gear ratio demands of the engines they will be matched to. Unlike other high-performance transmissions these models are hand-built by one technician from start to finish. Before a transmission and torque converter leaves the facility, they are dyno-tested for the equivalent of 100 miles, ensuring proper working conditions.

GearStar GM 4L65E Level 4 transmissions and included torque converters are built with the highest-quality parts available to provide heart-pounding performance with industry-leading experience. Choose the Level 4 transmission best suited for your build and strap yourself into the experience of uncompromising performance with the legendary road-proven craftsmanship of GearStar Performance transmissions!

More product features, items, and specifications may include:

* Versions of up to 650 hp and up to 600 lbs.-ft. of torque at the crankshaft
* Raybestos Stage 1 frictions and steels, high-energy wide bands
* Two TransGo recalibration shift kits with Shift Command
* OE-style filter and new internal wiring harness with new TCC solenoid
* New shift solenoids, EPC solenoid, PWM solenoid, and 3/2 control solenoid
* New manifold pressure switch, electronic speed sensor, and valve body spacer plate
* Corvette servo and Super Hold 4th gear servo
* New Torrington bearings
* Bushing kit and thrust washer or thrust washer kit
* Dual cage sprag (29-element)
* High-capacity multi-vane pump assembly with new rotor (some with slide)
* Hardened stator shaft, new vanes, and hardened rings
* Updated boost valve
* Pressure regulator valve
* Extra-capacity, heavy-duty drum assembly
* Heavy-duty 5-pinion steel planetary gear sets
* Transmission pan

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