Northland servo bore tool. The 4F27 kit contains all tooling necessary to repair both the 2-4 servo pin bore. Servo Bore Repair; Servo Bore Tool, Includes Reamer, Guides, And Sleeves, Overdrive And Intermediate Servos. The Apply oil for both the Overdrive and Intermediate servos on Ford's 5R55W, 5R55S, and 5R55N type transmissions comes up through the servo pin bore and through the hollow pin, applying the servo. The problem is that as the servo applies and releases, the pin wears the case. We have your Transmission needs covered to complete your repair job. Install the drill jig into the case by setting the jig into the servo. Buy Servo Bore Repair (T-9213) from Northland. As time goes by and the servos go through many apply and release cycles, the case wears and the pin no Browse high-quality OE and aftermarket auto parts to complete any repair or rebuild job, including rebuild kits, bushings, and pumps. Jul 30, 2017 ยท With these losses of pressure, the transmission's service life, even after a rebuild, is seriously shortened. With this loss of pressure, the band drags, burning both the band and the direct clutch. ahjbra3ezlbxortauh16zbxq7rhvvoktt3yhxnaf1vwckmr48lvy