Sonnax introduces Smart-Tech clutch kit for GM 4L series
Sonnax has introduced a new Smart-Tech clutch kit for optimizing clutch capacity and guarding against clutch burnup in GM 4L60, 4L60-E, 4L65-E and 4L70-E transmissions. This kit (part no. 77734-01K) includes eight .067-in. BorgWarner high-energy frictions and seven .095-in. Lindered steels recommended for use with Sonnax Smart-Tech input housings.
Sonnax highlights GM 4L heavy-duty output shafts
Sonnax highlights its line of heavy-duty output shafts for GM 4L transmissions. The company touts the torsional design that allows energy to be absorbed, reducing peak loads to critical areas. Transmissions these shafts fit include the 4L60-E, 4L65-E and 4L70-E lines. Sonnax offers part no. 74678L-HD for 2WD and Corvette applications; and part no. 74678S-HD
Sonnax highlights intermediate clutch backing plates for GM transmissions
Sonnax highlights its heavy-duty intermediate clutch backing plates for GM 4L80-E, 4L85-E and TH400 transmissions. Both backing plates are compatible with OE and aftermarket cases, the company says. Plates available include:
Sonnax introduces input housing forward sleeve kit for GM 4L series
Sonnax has introduced a new input housing forward sleeve kit (part no. 77733-52K), which the company says can increase input housing torque capacity and maintain OE forward piston apply area in GM 4L60, 4L60-E, 4L65-E and 4L70-E transmissions. Sonnax suggests using it combination with a Sonnax overrun sleeve to greatly increase the maximum strength of
Sonnax highlights oversized low overrun valve kit
Sonnax highlights its oversized low overrun valve kit #77754-62K, which the company says can restore hydraulic integrity of the low/reverse clutch circuit and salvage worn valve bodies in GM 4L60-E, 4L65-E and 4L70-E transmissions if installed after reconditioning the bore. This kit requires Sonnax tool kit F-77754-TL62 for installation.
Sonnax introduces Second Gear Servo Kit
Sonnax has introduced Second Gear Servo Kit (part no. 77701-02K), which is a direct replacement part for GM 4L70-E transmissions. Sonnax says this kit can improve shift feel without risk of harsh 1-2 shifts in GM 4L60-E and 4L65-E transmissions. This kit is also compatible with Sonnax Fourth Gear super hold dual servo kit 77767K.
Sonnax highlights oversized servo pin kit
Sonnax has introduced an oversized servo pin kit (part number 77787-03K) for reconditioned GM 4L60, 4L60-E, 4L65-E and 4L70-E case bores. According to the company, this chromoly steel servo pin matches the longest OE pin length and is fully compatible with OE and aftermarket servos.
Sonnax highlights accumulator valve train kit
Sonnax has introduced an accumulator valve train kit (part number 77754-10K). According to the company, it is built to prevent sleeve wear in GM 4L60-E series transmissions. The 4L60-E series valve train has three OE size variations: CX, DX and YZ. This kit is specifically designed for the DX size with additional selective springs to
