AWTF-80 SC

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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 440Nm (325lb-ft) of torque. It is built in Anjo, Japan. It is also called the TF80-SC, 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 358mm in length and weighs 90kg (198lbs). Its combined use of a conventional 5-pinion planetary gearset and a compound Ravignaux gearset makes it incredibly light and compact. This combination is known as a Le Pelletier arrangement. The shifting of gears is managed by a sophisticated computer programme which over-sees 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 8.0L (8.45qt).

All wheel drive transfer cases can be fitted to the AWTF-80 SC, making it ideal for use in cross-over type SUVs.

[edit] 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:

7000rpm (up to 350Nm)
6500rpm (350Nm to 400Nm)

Torque Converter Diameter:

260mm

[edit] Applications

[edit] References