Sonnax Performance Pack HP-4R100-01 offers innovative, heavy-duty calibration for firmer shifts under load without sacrificing low-speed drivability. Precision components upgrade the 4R100 for maximum performance and durability by recalibrating pressures and shift accumulation. Durable, improved parts target commonly worn areas in the transmission to repair damage and prevent future wear and tear.
This year I have installed 4 of the HP-4R100-01 kits and have been so satisfied with the reaction of my customers that I installed one in my own truck. Great product! Thanks Sonnax!D. Grenfell
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.Learn More about Sonnax Performance Packs