TransGo Shift Kit GM 4L60E Includes .500" Boost Valve (4L60E-HD2) 1993-up

Non-Domestic Product: No

Custom Bundle: No

Manufacturer Part Number: 4L60E-HD2

Vintage Part: No

Modified Item: No

Brand: TransGo

Type: Shift Kit

Interchange Part Number: T74171E

Manufacturer Warranty: No Warranty

Country/Region of Manufacture: United States

Universal Fitment: Yes

Performance Part: Yes

TransGo Reprogramming Kit

Valve Body Rebuild Kit

Fits 4L60E, 4L65E, 4L70E and 4L75E 1993-2011 Except Hybrid units.
Perfect for Crisp muscle car or full race shifts. Puts the driver in command. Holds 1st, 2nd, 3rd to any speed. Backshifts to 3rd, 2nd and 1st by moving the lever.

Includes: 7-CS (High RPM Clutch Spring Kit) 4L60E-BOOST (.500 Boost Valve)

This 4L60E-HD2 Reprogramming Kit fits 1993 to 2015 General Motors vehicles equipped with the 4L60E, 4L65E and 4L70E automatic transmission. Common complaints on this transmission are TCC slip or shudder, code P1870 or P0894, harsh 1-2 shift, double bump shifts, 2-3 flare up, burnt 3-4 clutch plates as well as inconsistent pressure boost problems.

The torque converter clutch regulator valve bore is very prone to wear causing the TCC slip complaints and related code. The TCC slip code leads to the harsh 1-2 upshift as the ECM recognized the TCC slip and commands high line pressure to avoid further TCC slippage and damage. The 3-4 clutch plate failure as well as the 2-3 flare up complaints are caused by an inconsistent pressure boost and poor overall calibration of the shift accumulation system.

Features and benefits:

This TransGo Reprogramming Kit includes valve body, servo, pump and accumulator components and modifications designed to deliver increased durability while providing firm shifts as well as a more efficient TCC apply. It includes components as well as modifications that recalibrates the entire accumulation system, clutch and band feed orifices. These changes work in concert with an aggressive line pressure curve to greatly improve the overall durability and shift feel of the transmission. . Furthermore, the included drop-in USA-made TCC isolator and regulator valve features longer lands which restores the hydraulic integrity of the circuit by utilizing previously unused and therefore unworn areas of their bore. Lastly, on 1993 to 2008, the gear command feature will allow for full gear lever controlled downshifts 3^rd through 1^st gear as well as holding manual 1^st or 2^nd gear to any speed or RPM.

Corrects/Prevents/Reduces:

• TCC slip or shudder
• Code P1870 and P0894
• Harsh 1-2 shift
• Long soft shifts
• Double bump or slide bump on the 1-2 shift
• 2-3 flare up
• 2-4 band failure
• Burnt 3-4 clutch plates
• Burnt forward and low/reverse clutch plates
• Pump slide and valve bore wear

Includes:

• Second servo piston spring, two shims and two O-rings
• (2) 1-2 accumulator springs, spring seat and three spacers
• 3-2 Downshift valve spring
• Actuator feed limit valve spring
• (2) 1-2 accumulator valve springs
• USA-made hardened steel 1-2 shift valve and spacer
• Low valve spring
• USA-made hardened TCC regulator and isolator valve, spring and installation bolt
• (2) Pressure regulator valve springs and spacer
• .500” boost valve, bushing and snap ring
• EPC screen wire spacer and oversized 1-2 checkball
• (2) Drill bits
• (2) Reverse input piston orifice cup plugs
• 3-4 accumulator spring
• (2) Valve body gaskets
• Pan gasket
• 3-4 clutch return springs and orifice capsule
• Forward clutch return springs and installation washer

Installation recommendation: Professional technician
Transmission removal necessary for complete installation: Yes

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