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Pack, Performance, 4L60-E, 4L65-E, 4L70-E, GM (94-05)

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Pack, Performance, 4L60-E, 4L65-E, 4L70-E, GM (94-05)
Pack, Performance, 4L60-E, 4L65-E, 4L70-E, GM (94-05)HP-4L60E-01 Sonnax
Price: $230.18
Part Number: TAT-HP-4L60E-01-SX

Get the shifts you want and that extra edge you need with the Sonnax Performance Pack for 4L60-E, 4L65-E and 4L70-E transmissions.

Features & Benefits

Shorter shifts
Can be installed in-vehicle
Faster line pressure increase and higher overall line pressure for greater clutch/ band holding power
Ultra-reliable Sonnax patented pinless accumulator pistons in 1-2, 3-4 and FWD locations
Unique 1-2 accumulator spring combination for shifts with character
Reduction in high RPM pressure drop-off
Patented 3rd accumulator orifice check valve gets the 2-3 right the first time, every time
Consistent results on every job, with no guessing on calibration
Fixes wear of accumulators and separator plate in hard-working units

Parts Included:

  • Boost Valve with O-Ring .490"
  • Elevated Pressure Regulator Spring 
  • High RPM Pump Slide Spring 
  • Spacer 
  • 4th Servo Return Spring 
  • Servo Cushion Spring 
  • Servo Piston D-Ring Kit 
  • 3-4 Accumulator Piston Kit 
  • 3-4 Accumulator Spring 
  • Servo Release Check Valve 
  • Forward Accumulator Kit 
  • Accumulator Valve Shim 
  • TCC Valve 
  • TCC Spring 
  • Checkballs (8) 
  • Separator Plate Plugs Not Shown
  • Twist Drills Not Shown
  • 1-2 Pinless Accumulator Piston Kit 
  • 1-2 Accumulator Inner Spring 
  • 1-2 Accumulator Outer Spring 
  • 1-2 Accumulator Waved Spring 



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