AWTF-80 SC
Encyclopedia
The Aisin AWTF-80 SC is a 6 speed automatic transmission designed for use in transverse engine
applications. It is designed to handle a maximum of 440 N·m (324.5 ft·lbf) of torque. It is built in Anjo, Japan
. It is also called the TF80-SC, AWF21, AF40-6, AM6 and AW6A-EL.
The design team set out to create a 6 speed automatic that fits in the same space as a manual gearbox. It measures 358 mm (14.1 in) in length and weighs 90 kg (198 lb). Its combined use of a conventional 5-pinion planetary gearset and a compound Ravigneaux gearset
makes it incredibly light and compact. This combination is known as a Lepelletier arrangement. The shifting of gears is managed by a sophisticated computer programme which oversees a clutch-to-clutch actuation. Gear changes are accomplished by one clutch engaging the instant the clutch from the previous gear disengages. The transmission control module (TCM) is located inside the transmission housing, instead of being located outside it. The advantage of this is to reduce external wiring as well as to provide a constant environment for TCM operation which encourages longevity. One aspect of the advanced nature of the electronics is at idle, it automatically selects neutral gear to reduce internal temperatures and improves fuel economy.
It utilises a special AW-1 transmission fluid which is labelled as being maintenance free. It has a fluid capacity of 8 litres (16.9 US pt).
All wheel drive transfer cases can be fitted to the AWTF-80 SC, making it ideal for use in cross-over type SUVs.
Maximum Shift speeds:
7000 rpm (up to 350 Nm)
6500 rpm (350 Nm to 400 Nm)
Torque Converter Diameter:
260 mm (10.2 in)
Transverse engine
A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the long axis of the vehicle. Many modern front wheel drive vehicles use this engine mounting configuration...
applications. It is designed to handle a maximum of 440 N·m (324.5 ft·lbf) of torque. It is built in Anjo, Japan
Anjo, Aichi
is a city located in Aichi Prefecture, Japan. As of August 2011, the city had an estimated population of 179,614 and a population density of 2,090 persons per km²...
. It is also called the TF80-SC, AWF21, AF40-6, AM6 and AW6A-EL.
The design team set out to create a 6 speed automatic that fits in the same space as a manual gearbox. It measures 358 mm (14.1 in) in length and weighs 90 kg (198 lb). Its combined use of a conventional 5-pinion planetary gearset and a compound Ravigneaux gearset
Ravigneaux planetary gearset
The Ravigneaux gearset is a double planetary gear set commonly used in automatic transmissions. This planetary gear set is constructed from two gear pairs, ring-planet and planet-planet. The Ravigneaux set has two sun gear wheels, a large sun and a small sun, and a single carrier gear with two...
makes it incredibly light and compact. This combination is known as a Lepelletier arrangement. The shifting of gears is managed by a sophisticated computer programme which oversees a clutch-to-clutch actuation. Gear changes are accomplished by one clutch engaging the instant the clutch from the previous gear disengages. The transmission control module (TCM) is located inside the transmission housing, instead of being located outside it. The advantage of this is to reduce external wiring as well as to provide a constant environment for TCM operation which encourages longevity. One aspect of the advanced nature of the electronics is at idle, it automatically selects neutral gear to reduce internal temperatures and improves fuel economy.
It utilises a special AW-1 transmission fluid which is labelled as being maintenance free. It has a fluid capacity of 8 litres (16.9 US pt).
All wheel drive transfer cases can be fitted to the AWTF-80 SC, making it ideal for use in cross-over type SUVs.
Specifications
Gear Ratios:| 1 | 2 | 3 | 4 | 5 | 6 | R | Final Drive |
|---|---|---|---|---|---|---|---|
| 4.148 | 2.37 | 1.556 | 1.155 | 0.8591 | 0.686 | 3.394 | 3.20 |
Maximum Shift speeds:
7000 rpm (up to 350 Nm)
6500 rpm (350 Nm to 400 Nm)
Torque Converter Diameter:
260 mm (10.2 in)
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