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

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