Product Description
Fits '94-later units.
The Sonnax Performance Pack is a must-have for any heavy-duty vehicle and the very best foundation for high-performance racing. All components work together to carefully tune line pressure, accumulator pressure and shift calibration. It’s the ultimate way to get an impressive transmission that responds to throttle and increased load with quick, firm shifts.
Consistent, firmer shifts under load without sacrificing low-speed drivability or guessing on calibration
Faster pressure increase and higher overall pressure for greater clutch/band holding power
Three ultra-reliable, patented, billet pinless accumulator pistons
Unique 1-2 accumulator spring combination for shifts with character
Improved high RPM pressure
Third accumulator valve gets the 2-3 right the first time, every time
Durable parts target commonly worn areas and prevent future damage to the accumulators and separator plate
The only way to eliminate PWM function without over-pressurizing converters (optional)
Performance Pack includes:
Part No. HP-4L60E-01
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
1-2 Accumulator Valve Shim
TCC Pressure Limiter Valve & Spring Optional, eliminates PWM/EC3 function
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
Buy quality transmission parts and solenoids. Fast free shipping to the US
I have been in the transmission industry for over 25 years, we do not sell anything that we don't use on our own rebuilds.
Other Details
If you ever have any issues with any of our parts please contact us. We are here to help and stand behind all of the products we sell. Sales@transpartsnow.com Return Policy Parts that are sealed are not returnable once they are opened. This includes all parts that are in Sealed Plastic. Overhaul kits are not returnable if opened. No returns after 30 days. A 20% restocking and handling fee will be applied to all returnable items. Shipping cost is not refundable. All returns must have prior company approval and authorization, with conformation email from Transmission Parts Now. LIMITED WARRANTY: All new, rebuilt and used parts listed on transpartsnow.com are warranted to be free of defects in material and workmanship for a period of 90 days from the date of purchase. Our liability under this warranty is limited to replacing or crediting the original purchase price of any part found to be defective. No claims for labor, shipping or consequential damage will be accepted. What is not covered under this warranty: removal or installation costs, damage due to accident, misuse or alteration, damage due to improper installation. All parts claimed defective must be returned prepaid freight for inspection with a written explanation of how or why the part is defective. All returns must have prior company approval and authorization.Product Videos
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Sonnax 4L60 Transmission Upgrades from SEMA 2013
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Sonnax Performance Transmission Products at ATRA Powertrain Expo 2014
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