Common complaints on this transmission soft 2-3, no upshifts.
The Transgo 4L60E-HD2 is meant for crisp muscle car or full race shift. This TransGo 4L80E SHIFT KIT Valve Body Repair Kit fits 1991 to 2013 General Motors. 2007 and later models equipped with the input speed sensor require transmission removal. SPECIFICATION 1st gear ratio: 2:1 (same as the stock kit transmission)5. This kit can be installed while the transmission is in the vehicle on 1993-2006 models only without the input speed sensor.
Lastly 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. 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.
These changes work in concert with an aggressive line pressure curve to greatly improve the overall durability and shift feel of the transmission. It includes components as well as modifications that recalibrates the entire accumulation system, clutch and band feed orifices. 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. 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. Perfect for Crisp muscle car or full race shifts. 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. Fits GM Commodore VR, VS, VT, VE 4L60E, 4L65E, 4L70E and 4L75E 1993-2011 Transmissions Except Hybrid units. The torque converter clutch regulator valve bore is very prone to wear causing the TCC slip complaints and related code. 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. This 4L60E-HD2 Reprogramming Kit fits 1993 to 2015 General Motors vehicles equipped with the 4L60E, 4L65E and 4L70E automatic transmission.