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Zieichy Upgraded 4L80E-HD2 Reprogramming Kit For 4L80E 4L85E GMC Chevy Hummer GM 1991-09
This 4L80E-HD2 Reprogramming Kit fits 1991 to 2013 General Motors vehicles equipped with the 4L80E and 4L85E automatic transmission. 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.
Fitments:
Fits 1991-On 4L80E & 4L85E Models
- Other Part Number:Fits 4L80E & 4L85E
- Surface Finish :BOXED/PACKAGED KIT AS SHOWN
- Transmission Type: 4L80E,4L85E
- Years :1999-2009
- Manufacturer Part Number: 4L80EHD2,4L80E-HD2
- Interchange Part Number :Transgo Reprogramming Kit
Package Includes:
Heavy duty intermediate case snap ring
(2) Accumulator valve springs, end plug and O-ring
Actuator filter tapered plug, O-ring, spring and end plug
Relief valve system plate, valve, spring, e-clip and nuts
Laminated triple separator plate
Valve body and accumulator body gaskets
(2) Drill bits
3rd accumulator spring
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
$15.99
$ 6 .99 $6.99
$162.75
$ 65 .99 $65.99