4l60E, VR to VE 4sp, Transgo Shift Kit HD2, stage 2, Automatic transmission.

Transgo 4L60E – HD2 reprogramming 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) NOTICE: 98 up:

If vehicle has Torque Management this kit will not make hard shifts.

However many aftermarket programmers for engine performance reduce Torque Management.

Special Instructions: Does not require transmission removal for installation.

Note: “7-CS” (Clutch Spring Kit) requires transmission removal for Installation if revving over 5500 RPM

“4L60E-BOOST” (.500 Boost Valve) After March 2005 an Input Speed Sensor was added which requires transmission removal for installation.

Previous to March 2005 does not require transmission removal.

This 4L60E-HD2 Reprogramming Kit fits 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.