The ZF S6-650 is a 6-speed manual transmission manufactured by ZF Friedrichshafen AG. It is designed for longitudinal engine applications, and is rated to handle up to 705 newton-metres (520 lbf⋅ft) of torque. General Motors used the S6 as RPO ML6. Gear ratios: ZF introduced the S6-650 in 1998 on the Ford Super Duty.

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Order 1999-2010 Ford ZF S6-650 & S6-750 transmission parts online at Torque King. We have a number of Ford ZF6 transmission parts including clutch parts, gears, shafts, and more. Purchase 1999-2010 Ford ZF6 transmission manuals and parts today.

There are several variations of the ZF 6 speed within the S6-650 and S6-750 series, including 4 wheel drive and 2 wheel drive versions. The obvious difference between the 2 and 4 wheel drive variations is in the rear housing of the transmission case, which either adapts to a transfer case or a tailshaft housing depending on the drive type.

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Dec 29, 2006 · ZF S650: An extremely heavy-duty unit with 6 forward speeds. All gears are synchronized. This unit has an aluminum case with integral bell housing, a center support, and rear case. This unit is built in both 2 and 4WD versions.

The ZF 6 Speed is a German ZF Friedrichshafen AG engineering design, This transmission is an end loaded aluminum case with integrated bell housing. The fully synchronized transmissions are quiet, offer smooth shifting with positive engagements, and have not been the subject of re-occurring problems.

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Oct 1, 2002 · The present trend toward larger and heavier-duty pickups has now brought the ZF S6-650 6-speed manual gearbox onto the scene. This 6-speed transmission was introduced in 1999 in the Ford F 250, F 350, F 450, F 550 and stripped-chassis models.