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Vehicle Info NeededSONNAXPART NUMBER: 852-HP-4L80E-01
Performance Pack for GM 4L80-E/4L85-E Transmissions
$38433
Ships on 09/04/2026
Lowest Price GuaranteeGM
Performance PackGM 4L80-E/4L85-E Transmissions Heavy-Duty Recalibration Quick-Firm Shifts Sold as a Kit
Breakdown of Included Items for Sonnax HP-4L80E-01
Features:
- Provides a stronger, faster, and more reliable transmission
- Recalibrates pressures and shift accumulation
- Delivers firm shifting points under an increased load
- Minimizes transmission pump leaks
- Eliminates the Torque Converter Clutch Pulse Width Modulation (TCC PWM) function without over-pressurizing the torque converter
- Helps maintain accurate fluid pressure and lubrication
- Does not sacrifice low-speed driveability
Part TypeAutomatic Transmission Shifter Repair Kit
BrandSONNAX
Package Height2.1
Package Width7.3
Package Length9.2
Weight2.31 PG
Part CategoryReplacement Parts
QuantitySold as a kit
Part FitmentSemi Universal
ApplicationGM 4L80-E/4L85-E
Vendor Part NumberHP-4L80E-01
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
