4L60E-L3 - 4L60E Transmission Input carrier Kit Input Housing Output Shaft Performance Pack
4L60E Transmission Sonnax High Performance Level 3 Build Package For all Extreme performance applications (above 450hp) This Super High Quality Kit Contains Upgraded Parts Manufactured by Sonnax 4L60E-L3 Fits '94-later units (Level 2) kit includes: Alto Red Eagle 2 1/4" Wide Intermediate Band Limitations of the GM 4L60-E, 4L65-E, 4L70-E OE input housing are the root cause of 3-4 burnup in performance applications. The weak OE backing plate flexes during clutch apply, allowing heat to build up unevenly within the clutch pack’s limited space. Stop the flex and you stop 3-4 clutch failure. The unique Sonnax Smart-Tech housing design makes room for a taller clutch pack anchored in place by a stronger backing plate, making it the only way to increase clutch capacity and protect against destructive heat. Numerous other improvements to the housing ensure maximum durability and protection against failure in higher horsepower, higher pressure applications. Smart-Tech input housing kit with heavy duty input shaft 77733-11K fits 300mm non-reluctor style units. The high-strength shaft features many unique refinements available only from Sonnax, including a unique design that protects against failure from stress cracks. Both the housing and shaft also are available separately. · Physically larger clutch pack area for increased 3-4 clutch capacity without sacrificing clutch durability. Use your choice of: · Eight .067" frictions with seven .095" steels · Nine .062" frictions with eight .077" steels · Anchored backing plate keeps clutches parallel to stop the flexing and distortion that leads to heat build-up · Treated housing is significantly more resistant to fatigue failure · Steel reinforcement sleeve prevents breakage in the spline area · Custom backing plate replaces OE retaining ring to eliminate risk of blowout Note: We will need to know if you need the 300mm Non Reluctor type, 300mm Reluctor type, or 298mm Heavy Duty Output Shaft Output shaft failure is common as power levels are increased in GM 4L60-E, 4L65-E and 4L70-E units. Sonnax heavy duty output shaft 74678S-HD for 4WD/AWD units is precision engineered and manufactured for unbeatable performance in high-horsepower street and strip builds. The shaft features many unique refinements available only from Sonnax, including a torsional design that allows energy to be absorbed, reducing peak loads to critical areas. · High-strength 300M steel shaft with rolled splines · Specially heat-treated and processed for maximum toughness · Torsional design absorbs energy, reducing peak loads to critical areas Note: We will need to know if you have a 4wd or 2wd 2.84 Input Carrier Kit- The steepest first gear ratio of any four-speed automatic (3.06) belongs to the GM 4L60/E family of transmissions. The shift from 3.06 ratio (1st gear) to 1.63 ratio (2nd gear) is a dramatic RPM drop that causes performance engines to fall out of their power band. Sonnax 2.84 input carrier kit 77284-K transforms the popular 4L60 series from an OE “wide ratio” 3.06/1.63 to a “close ratio” 2.84/1.55 for game-changing acceleration on the track. This keeps performance engines in the optimal power band while allowing a longer pull in first and second gears, improving consistency and performance. Manufactured and engineered for outstanding durability, the carrier's gears are precision-ground to OE standards, thrust washers feature highly wear-resistant PTFE-coated material and the captured bearing is thicker late design. Lube channels direct oil to the pinion pins, and the carrier can be disassembled for inspection and service. · Keeps engine in power band on 1-2 and 2-3 shifts · Delivers longer pull in 1st and 2nd gears · Six-pinion planet loaded with advanced durability features · No special tools or machining required Performance Pack: 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) Contains: 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 SmartShell HD Reaction Shell Kit: In GM 4L60, 4L60-E, 4L65-E and 4L70-E units, bulky aftermarket shells always fall short when splines continue to strip and the shells break under stress. A chronic problem with both OE and thicker aftermarket shells is failure of the rear planetary bearing. From daily jobs to extreme builds, the Sonnax SmartShell heavy-duty reaction shell kit 77749-02K is the only way to prevent shell failure AND protect the bearing. The SmartShell avoids the weight found in traditional, heavy-duty aftermarket shells thanks to a unique combination of improved design and manufacturing for a super strength shell that's only slightly bulkier than OE. To prevent thrust loads from overwhelming the captured planetary bearing, the SmartShell features a larger bearing and custom roller clutch race. These parts re-route thrust loads through the carrier, completely bypassing the delicate bearing. Rear Stator Support Bushing: The original GM 4L60, 4L60-E, 4L65-E, 4L70-E rear stator bushing comes in narrow and wide versions in both common bronze and harder aluminum type materials. All versions commonly fail or wear out prematurely. Available aftermarket replacements typically have a poor quality fit and are also known to wear. For maximum durability Sonnax offers rear stator support bushing 77002BT-01, a better fitting and extremely wear-resistant, PTFE-lined bushing to stop future wear in its tracks. The Sonnax bushing is the best option for supporting the 20 lb. input housing and for improving the reliability of these common units. Rear Stator Support Bushing: The original GM 4L60, 4L60-E, 4L65-E, 4L70-E rear stator bushing comes in narrow and wide versions in both common bronze and harder aluminum type materials. All versions commonly fail or wear out prematurely. Available aftermarket replacements typically have a poor quality fit and are also known to wear. For maximum durability Sonnax offers rear stator support bushing 77002BT-01, a better fitting and extremely wear-resistant, PTFE-lined bushing to stop future wear in its tracks. The Sonnax bushing is the best option for supporting the 20 lb. input housing and for improving the reliability of these common units. 4th Gear Super Hold Servo: Sonnax 4th gear super hold dual servo kit 77767K features 40% more apply surface area for greater holding power in GM 4L60, 4L60-E, 4L65-E and 4L70-E units. Vehicles with these transmissions often exhibit poor 3-4 shift quality and experience band failure in performance applications. Patented dual-piston design with 40% more apply delivers greater holding power D-ring seals prevent pressure loss Heavy Duty 2-3 Shift Valve: When the GM 4L60-E family of transmissions evolved from the 700-R4, the overrun cluch apply no longer applied in 1st and 2nd when acclerating from a stop in D3 shifter position. This change was made to improve coastdown drivability in D3, but had the side effect of reducing reduced the torque capacity of the input section. For greatly improved input sprag and Forward clutch durability, Sonnax heavy-duty shift valve 77754-41 for 4L60-E, 4L65-E and 4L70-E units will apply the overrun clutch in D3 1st, 2nd and 3rd gears. Corvette Servo- Sonnax 2nd gear "Corvette" ratio servo kit 77701-04K provides increased apply area resulting in improved holding power for firmer 1-2 and 3-4 shifts. The servo piston features D-rings in place of the OE seal rings for improved sealing during apply and release. This kit is compatible with Sonnax 4th gear Super Hold dual servo kit 77767K. Upgrade used for high performance or heavy-duty towing applications Improved D-ring sealing configuration Heavy Duty 2-3 Shift Valve: When the GM 4L60-E family of transmissions evolved from the 700-R4, the overrun clutch apply no longer applied in 1st and 2nd when accelerating from a stop in D3 shifter position. This change was made to improve coastdown drivability in D3, but had the side effect of reducing reduced the torque capacity of the input section. For greatly improved input sprag and Forward clutch durability, Sonnax heavy-duty shift valve 77754-41 for 4L60-E, 4L65-E and 4L70-E units will apply the overrun clutch in D3 1st, 2nd and 3rd gears. Input Drum Reinforement Kit- The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack where the input shaft is pressed into it (where the overrun piston rides). Sonnax offers a hardened steel sleeve that reinforces the input drum to prevent this failure. Sonnax input drum reinforcement kit 77733-51K includes a custom manufactured overrun piston that is designed to be used only with a stamped steel forward piston, eliminating the need to use OE cast forward pistons or aftermarket billet forward pistons. Includes a custom manufactured overrun piston Compatible with stamped steel forward pistons Can be installed in early- and late-model units Sleeve made from hardened chromoly steel Sleeve design will not block clutch feed oil WARNING: This kit must be used with a ’97-later stamped steel forward piston, it cannot be used with '96-earlier aluminum forward piston or Sonnax billet forward piston 77764-01.