On those with the added input speed sensor, transmission removal is necessary to access the boost valve. However, in March 2005, General Motors gradually started adding an input speed sensor in this transmission which inhibits access to the boost valve assembly. Note that up to March 2005 the kit can be installed in the vehicle. The unique proprietary boost valve assembly design replaces either the OEM long or short type.

TransGo drop-in replacement boost valve and bushing assemblies provides you with an economical and durable direct replacement for the OEM assembly that is prone to wear. Availability:ĤL60E-BOOST 0.500” diameter for applications that require a faster line pressure boost curve and increased max line pressure Features and benefits: 11mm or 7/16 socket or box-end wrench if removing driveshaft 5. 15mm deepwell socket (if drooping transmission) 3. These complaints can also be accompanied by a wide variety of gear ratio, shift and solenoid performance codes. TransGo 4L60E HD2-C (version C) Shift Kit instructions for 1995 Chevy Caprice/Impala or Buick Roadmaster 4L60E. Consequently, a compromised boost valve may cause complaints of soft shifts, flare shifts, burnt frictions and a burnt lock-up clutch. Adequate main line pressure rise is required to provide enough clamping force under all load conditions to prevent slipping, as well as to achieve proper shift quality. It does this by varying the pressure control solenoid current, which in turn increases the main line pressure accordingly. The computer tailors the line pressure rise in accordance with the calculated load. As a result, the transmission will not have the required main line pressure under load. 1993 to 2015 General Motors vehicles equipped with the 4L60E, 4L65E and 4L70E automatic transmission over time wear out the pressure regulator boost valve assembly in the pump.

Transgo shift kit instructions 4l60e