Description
4L80E / 4L85E TransGo Reprogramming Kit, 1991-2013, 4L80E-3.
This TransGo Reprogramming Kit provides full manual control for upshifting and downshifting 1st through 4th gear, there are no automatic shift functions retained.
This 4L80E / 4L85E 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 boost pressure problem can result in a costly broken case, direct drum and piston failure.
Corrects / Prevents / Reduces:
- High pressure parts breakage
- Soft 2-3 shift
- Burnt direct clutch
- Low pressure due to solenoid filter breakup
- Provides full manual control for upshifting and downshifting 1st through 4th gear
Includes:
- Accumulator valve spring, end plug and O-ring
- Relief valve system plate, valve, spring, e-clip and nuts
- 3-4 Shift valve spring
- 2-3 Shift valve spring
- 1-2 shift valve end plug and retainer
- Heavy duty intermediate case snap ring
- Actuator filter tapered plug, O-ring, spring and end plug
- (4) Drill bits
- Laminated valve body triple separator plate
- Valve body separator plate and accumulator body gaskets
- 3rd accumulator spring
- USA-made hardened boost valve and bushing
- Pressure regulator valve spacer, washer, springs and snap ring
- New stronger 4th feed bolt and washer
- 1-2 accumulator spring
- (16) Direct clutch return springs
- Brass fitting
- Vacuum modulator, pin, valve and bushing
- Hold down bracket
- Elbow vacuum hose and spring
- (4) Short zip ties
- (5) Long zip ties
- Vacuum tee
