The ZF S6-650 is a 6-speed

manual transmission A manual transmission (MT), also known as manual gearbox, standard transmission (in Canada, the United Kingdom, and the United States), or stick shift (in the United States), is a multi-speed motor vehicle transmission (mechanics), transmission ...

manufactured by

ZF Friedrichshafen AG ZF Friedrichshafen AG, also known as ZF Group, originally ''Zahnradfabrik Friedrichshafen'', and commonly abbreviated to ZF (ZF = "Zahnradfabrik" = "Cogwheel Factory"), is a German car parts maker headquartered in Friedrichshafen, in the south- ...

. It is designed for

longitudinal engine In automotive engineering, a longitudinal engine is an internal combustion engine in which the crankshaft is oriented along the long axis of the vehicle, front to back. Use This type of motor is usually used for rear-wheel drive cars, except ...

applications, and is rated to handle up to of

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...

General Motors The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and ...

used the S6 as RPO ML6. Gear ratios:

Applications

* 2001–2006

Chevrolet Silverado The Chevrolet Silverado is a range of trucks manufactured by General Motors under the Chevrolet brand. Introduced for the 1999 model year, the Silverado is the successor to the long running Chevrolet C/K model line. Taking its name from th ...

2500HD and 3500 * 2001–2006

GMC Sierra GMC Sierra (Classic) may refer to GMC counterparts, either as model names or as trim lines, to the following Chevrolet vehicles: *Chevrolet C/K *Chevrolet Silverado *Chevrolet Suburban The Chevrolet Suburban is a series of automobiles bui ...

2500HD and 3500 * 1999–2010 Ford

Ford Super Duty The Ford Super Duty (short for F-Series Super Duty) is a series of heavy-duty pickup trucks produced by the Ford Motor Company since the 1999 model year. Slotted above the consumer-oriented Ford F-150, the Super Duty trucks are an expansion of t ...

F-250, F-350, F-450 & F-550 (with diesel engines) * 2002–2010 Ford

F-250, F-350, F-450 & F-550 (with gas engines)

Significance

ZF introduced the S6-650 in 1998 on the Ford Super Duty. GM started using the ZF S6-650 in 2001 with some alterations, making this transmission different from the Ford version. The S6-650 will likely be the last

GM and

Ford Ford commonly refers to: * Ford Motor Company, an automobile manufacturer founded by Henry Ford * Ford (crossing), a shallow crossing on a river Ford may also refer to: Ford Motor Company * Henry Ford, founder of the Ford Motor Company * Ford F ...

will use in their heavy pick ups, due to advancements in

automatic transmission An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving c ...

technology and low consumer demand for manual transmissions.

Construction

The ZF S6-650 – Heavy Duty 6 speed manual transmission has an aluminium alloy main gear case and tail housing with the bell housing integral to the case. It is built in two-wheel drive and four-wheel drive versions. The model used in the Ford trucks has an internal oil pump to circulate and cool the lubricant, which is uncommon in manual transmissions. The GM versions are not equipped with an oil pump. All gears are synchronized. There is a dual cone synchronizer on 2nd and 3rd gears with an input torque rating of 520 ft-lb.

References

* http://www.autoworld.com/news/gmc/zf_s6_650.htm S6-650 General Motors transmissions {{automotive-part-stub

Applications

Significance

Construction

See also

References