4L80E-3 Transgo Reprogramming Shift Kit Manual Transmission (SK4L80E-3)*

Interchange Part Number: T34173ECountry of Manufacture: United StatesPart Brand: TRANSGOInstallation Requirements: Transmission removal not required for installationOther Part Number: TRG-4L80E-3Manufacturer Part Number: 4L80E-3Brand: Professional GradeManufacturer Warranty: YesReprogramming Kit™ Manual Shift Control Fits 1991-13 4L80E, 4L85E SKU: 4L80E-3 This 4L80E-3 Reprogramming Kit fits 1991 to 2013 General Motors vehicles equipped with the 4L80E and 4L85E automatic transmission with gas engines only.  Common complaints on this transmission are no upshifts, soft 2-3 shift, burnt direct frictions, broken hard parts as well as gear ratio and solenoid performance codes. The boost valve assembly is notorious for wear causing both low pressure as well as runaway boost pressure. With the low boost pressure problem, the resulting complaints are a soft 2-3 shift, direct clutch failure as well as the gear ratio and solenoid performance codes. On the other hand, the runaway boos