The gearbox, which its creators call 4F27E, is a new development, developed with the system support of Mazda, a subsidiary of Ford, specifically for use in the Focus. 4F27E stands for: 4 - four-speed gearbox, F - front-wheel drive, 270 lb.ft (365 Nm) - maximum torque at the input after the torque converter, E - Electronic (fully electronically controlled). The new automatic transmission works with a clutch for locking the torque converter and an overdrive (upshift) gear engaged at the touch of a button. Two sequentially switching sets of planetary gears implement the corresponding transmission ratios - three multi-plate clutches, a friction brake, a brake band, and a roller freewheel clutch perform the functions of drive or braking. The drive torque passes through the intermediate gear stage before reaching the main gear.
Design and operation of the 4F27E gearbox: 1 - 2nd/4th gear brake band; 2 - sets of planetary gears; 3 - reverse gear brake; 4 - clutch 1st - 3rd gear; 5 - oil pump with torque converter reactor unit; 6 - torque converter; 7 - gearbox input shaft; 8 - differential; 9 - intermediate gear stage; 10 - output gear - automatic transmission; 11 - 1st gear freewheel clutch; 12 - reverse clutch; 13 - 3rd - 4th gear clutch.
(The original can be found on this resource: «Fordbook.ru»)
