2012 AISIN-WARNER F40 SIX-SPEED FWD/AWD AUTOMATIC (MDK)

Vehicle Applications

·  Buick Regal CXL Turbo

Product Highlights

·  High ratio spread of 6.05:1 for optimal fuel economy and smoothness

·  Neutral idle feature enhances fuel economy

·  Selective Sport Mode

·  Manual Shift Control

·  Maximum engine torque capacity of 295 lb.-ft. (400 Nm)

Overview

The Aisin-Warner AF40-6 is a compact, lightweight, electronically controlled six-speed automatic transaxle for front-wheel-drive and all-wheel-drive applications. It is used in the front-drive Buick Regal CXL Turbo (MDK) and the Cadillac SRX equipped with the 2.8L V-6 VVT turbo (MXE). A high ratio spread of 6.05:1 helps deliver optimal fuel economy, while also supporting smooth, quiet highway performance.

The MXE version has a higher torque capacity of 332 lb.-ft. (450 Nm) vs. the MDK’s 295 lb.-ft. (400 Nm).

A unique combination of a conventional five-pinion planetary gear set and a compound Ravignaux gear set – known as a Le Pelletier arrangement – makes the AF40-6 very lightweight and compact. Shifts are managed by a sophisticated transmission control module (TCM) that oversees clutch-to-clutch actuation, while gear changes are accomplished by one clutch engaging the instant the clutch from the previous gear disengages.

The TCM is located inside the transmission housing, which reduces complexity and provides a consistent environment that promotes greater durability. It also enables special features including driver-selectable manual-shift mode and sport mode. The manual-shift mode allows the driver to control gear shifts, while the sport mode alters the shifting pattern to deliver a more performance-oriented driving experience.

Additional details of the AF40-6 include:

·  Lightweight die-cast aluminum housing

·  Neutral idle feature, which helps reduce internal temperature and enhances fuel economy

·  High-pressure clutch hydraulic control system delivers smoother, more immediate gear shift feel

·  “Filled for life” low-friction oil

The AF40-6 uses a six-element, dual-stage torque converter with a lock-up clutch that helps optimize fuel economy.

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