Sonnax Performance Packs

The Best Parts for Performance & Heavy Duty Recalibration

Performance enthusiasts look to Sonnax when building stronger, faster, more reliable transmissions. Performance Packs combine key Sonnax performance and heavy duty parts into powerhouse kits which take transmissions to the next level.

Performance Shifts on Demand

Performance Packs let you achieve firmer shifting under load without sacrificing low-speed drivability. It's the ultimate way to get an impressive transmission that responds to throttle and increased load with quick-firm shifts.

Dial-In Consistent Calibration Results

Select kit components are precision engineered to recalibrate pressures and shift accumulation. Detailed, step-by-step installation instructions make it easy to adjust transmission performance levels with confidence.

Repair & Prevent Damage

High-quality, innovative and durable Sonnax parts target commonly worn areas in the transmission and prevent future damage.

No Special Tools Required

"Sonnax really nailed it with this kit."
P. Barrett
Owner of Level 10 Transmissions, after ordering his 20th Sonnax 4L60E Performance Pack.
Hardyston, N.J.

"The Performance Pack works like a dream."
Russ
Speed Rated Motorsports
Fort Pierce, Fla.

"The best working performance units we have done, and that's not from me, but my customers."
B. Bastedo
Advanced Transmission Care
Mooresville, N.C.

GM 4L60-E, 4L65-E, 4L70-E Performance PackLearn More

Part No. HP-4L60E-01

Shorter shifts which get progressively firmer with load
Critical foundation for other 4L60 performance upgrades
Faster pressure increase & higher overall pressure for greater clutch/band holding power
Patented 2-3 calibration for consistent results
Unique 1-2 accumulator spring combination & patented billet accumulator pistons
Prevents accumulator & separator plate wear
Improved high RPM pressure
Optional TCC on-off conversion

Ford 4R100 Performance PackLearn More

Part No. SC-4R100HD

Recalibrated accumulator pressure & accumulator pistons, with tuneability for great heavy-duty shifts
Improved accumulator valves for greater clutch durability
Sure Lock^™ overdrive retaining ring presents loss of 4th
Hardened, one-piece case bushing
Improved pump components to minimize leaks, maintain pressure, TCC performance & lube
Includes internal parts for setup & to prevent common failures

Note: Formerly a popular Sure Cure^® option, this kit has been further refined to become a Performance Pack with the inclusion of intermediate & direct clutch feed seal parts.