Skip to content

Sonnax Performance Pack HP-4L80E-01 - UPGRADES your complete transmission!

by Sonnax
SKU S34507HPK
Original price $291.31 - Original price $291.31
Original price
$291.31
$291.31 - $291.31
Current price $291.31
Availability:
Low stock

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Non-Domestic Product: No

Custom Bundle: No

Fitment Type: Direct Replacement

Items Included: See picture

Manufacturer Part Number: HP-4L80E-01

Vintage Part: No

Modified Item: No

Transmission Type: Automatic

Brand: Sonnax

Type: Rebuild Kit

Manufacturer Warranty: Unspecified Length

Surface Finish: New

Universal Fitment: Yes

Performance Part: Yes

Sonnax Performance Pack HP-4L80E-01

Fits 1991-On 4L80E & 4L85E Models

Sonnax Performance Pack HP-4L80E-01 upgrades GM 4L80-E and 4L85-E transmissions for maximum performance and durability in work/sport vehicles. Innovative components work together to precisely recalibrate pressures and shift accumulation, delivering firmer shifts under load without sacrificing low-speed drivability. To target common wear areas in the transmission, the kit includes many improved parts to repair damage, prevent future wear and improve reliability.

  • Recalibrated shift accumulation, with tunability for great, heavy-duty shifts
  • Improved pump components minimize leaks, plus maintain pressure and lube under demanding use
  • The only way to eliminate TCC PWM function without over-pressurizing the converter
  • Includes internal parts for setup and to prevent common failures
  • Line Pressure Booster Kit
  • Lube Regulated Pressure Regulator Valve
  • TCC Pressure Limiter Valve, Spring & Plug
  • AFL Filter End Plug & O-Ring Kit
  • Direct Clutch Dual Feed Plug
  • Direct Clutch Dual Feed Aluminum Plugs (3) 2 Extra
  • 1-2, 2-3 & 3-4 Accumulator Piston Springs (3)
  • Checkballs (8)
  • Twist Drill .062"
  • Twist Drill .086"
  • Heavy Duty Case Bushing & Bearing Kit
  • Direct Housing Support Ring & Seal
  • Heavy Duty Intermediate Piston Spring Retainer Plate
  • Case Saver Retainer
  • Heavy Duty Clutch Retaining Ring Intermediate Clutch
  • Accumulator Valve Springs & Adjustable End Plug 2 Springs
  • Heavy Duty Direct Piston Return Springs (8)
  • Forward Clutch Hub Front Washer .078"
  • Reverse Servo Spacer Kit

Installation recommendation: Experienced technician
Transmission removal necessary: YES

Please visit our eBay Store for more great products for your projects!

Please visit our eBay Store for more great products for your projects!

Use this text to share information about your product.

Blog posts