105 East Poplar Avenue - Cameron, WI


For General Motors 700-R4 & 4L60E Transmissions/h4>

Gold Series

4l30 kits

The 2-4 band in GM's 4L60 platform requires the servo pin to seal in two different positions, in two different gears. First, when the transmission shifts into third gear, it releases the servo using 3-4 clutch oil. Thus a leaking servo bore can cause a loss of pressure to the 3-4 clutch, and drag the band. Second, when the transmission applies the band in fourth gear, oil comes up through the hollow pin and applies a separate piston. This second piston allows the pin to travel through the second gear piston, which is still being held in place by 3-4 clutch oil. Thus not only does a leaky bore create a leak in third gear, it also creates a leak to the case of fourth gear oil, AND a cross leak of third and fourth gear oil.

The 4L60 kit contains tooling necessary to repair the 2-4 servo pin bore. The 4L60 kit is a GOLD series kit and is currently only available as a Master kit (pictured).



SF-99 Servo Pin Bore Repair System

The SF-99 servo pin bore repair system is a set of tools that allow you to easily repair worn servo pin bores with no special machinery, all that is needed is a drill and a hammer.

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Choose Tool By Kit Name

We offer different tooling for several transmissions. Choose tool by kit name below.

Choose Tool By Transmission Model

We offer different tooling for several transmissions. Choose tool by transmission model below.