Upgrade your 4L60E transmission with this standalone shift controller kit. Designed for easy installation, it requires no external computer—simply connect and go. The manual shift microcontroller allows you to select any gear manually, just like a full manual valve body. Use your factory column shifter or floor-mounted shifter (must have 7 positions: PRND321). The transmission will only shift when you move the shifter, giving you full control. Maintains forward shift pattern and engine downshifts. Operates with continuous full line pressure for firmer shifts, reduced clutch slippage, and cooler operating temperatures. Includes a torque converter lockup switch with indicator light. The kit comes with a complete wiring harness—no additional sensors or parts needed. Made of durable ABS plastic, this microcontroller is built to last. Dimensions: 17cm x 9cm x 7cm (6.7in x 3.5in x 2.8in). Weight: 200g (7.1 oz). Package includes: 1 x manual shift microcontroller kit. Note: Color may vary slightly due to lighting and display settings. Measurement tolerance: +/- 1-3cm.