Sonnax

For several years, technicians have been trying to solve the mysterious cold stall issue in vehicles equipped with Mercedes 722.6 transmissions. When the problem was first […]

In 1955 the automotive industry finally standardized the shift quadrant on all vehicles. From that time forward, all shifters would read from left to right (or […]

Part 1 in a four-part series on torque converter modifications When the original equipment manufacturers create their driveline packages, they have many issues to consider, such […]

To help understand some of the flow issues that plague the 4R100 converter, it’s a good idea to look first at its ancestor, the E4OD. The […]

The new General Motors (G.M.) Captive Clutch has four (4) spring steel straps which restrict the rotational movement of the piston. One end of each strap […]

When you are ordering torque converter parts from your supplier, it is important to be able to communicate your wants and needs to your salesperson. Frustrations […]

Impeller Vanes The movement of a vehicle relies on the torque converter’s ability to transfer the torque of the engine to the transmission (the beginning of […]

Have you ever found yourself chasing a “phantom” TCC driveability problem in a GM vehicle that uses the Allison 1000/2000/2400 series of transmissions? If you have, […]

Many of the early torque converter rebuilders learned the importance of paying attention to details the hard way. Machining the clutch surface on the early rear-wheel-drive […]