Ford/Borg-Warner transmission similarities

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   The B/W and FMX transmissions are a Ravigneaux gear set design, while the Torqueflite, C4/C6 and 350/400 Turbo transmissions are a Simpson gear set design.

From Wikipedia: "Most modern gearboxes employ the Ravigneaux planetary gear set design, which produces 4 forward gears from a single set, or a Lepelletier gear set which provides 6 or more forward gears by adding another standard planetary to the Ravigneaux gear set.

Nevertheless, some new cars are still sold with automatic transmissions based on the Simpson gear set. Such transmissions are typically four-speed, designed in the late 1990s, they are electronically controlled versions of older projects, and are kept in production because they are cheap, reliable, well-known and good enough for the target application."

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Buzzman72 Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Sep/15/2009 Location: Southern IN Status: Online Points: 2725	Post Options Post Reply Quote Buzzman72 Report Post Thanks(0) Quote Reply Posted: Nov/03/2016 at 5:54am
	The B/W and FMX transmissions are a Ravigneaux gear set design, while the Torqueflite, C4/C6 and 350/400 Turbo transmissions are a Simpson gear set design. From Wikipedia: "Most modern gearboxes employ the Ravigneaux planetary gear set design, which produces 4 forward gears from a single set, or a Lepelletier gear set which provides 6 or more forward gears by adding another standard planetary to the Ravigneaux gear set. Nevertheless, some new cars are still sold with automatic transmissions based on the Simpson gear set. Such transmissions are typically four-speed, designed in the late 1990s, they are electronically controlled versions of older projects, and are kept in production because they are cheap, reliable, well-known and good enough for the target application."
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