Aisin AF33 transmission
Encyclopedia
The Aisin AF33 is a 5-speed automatic
transaxle
. It is designed to be used in transverse engine
configurations and can handle up to 243 ft·lbf (329 N·m) of torque. It is built in Anjo
, Japan
.
The AF33 designation is only used by GM, whereas the actual model codes are AW55-50SN(FWD) and AW55-51SN(AWD). The AW55 designation is used by Volvo
and other automakers.
Gear ratios:
Transmission experts recommend regular fluid changes, at least every 50,000 miles. Special fluid must be used. If incorrect fluid is used it will result in improper operation and eventual transmission failure.
Automatic transmission
An automatic transmission is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually...
transaxle
Transaxle
In the automotive field, a transaxle is a major mechanical component that combines the functionality of the transmission, the differential, and associated components of the driven axle into one integrated assembly....
. It is designed to be used in transverse engine
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...
configurations and can handle up to 243 ft·lbf (329 N·m) of torque. It is built in Anjo
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...
, Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
.
The AF33 designation is only used by GM, whereas the actual model codes are AW55-50SN(FWD) and AW55-51SN(AWD). The AW55 designation is used by Volvo
Volvo
AB Volvo is a Swedish builder of commercial vehicles, including trucks, buses and construction equipment. Volvo also supplies marine and industrial drive systems, aerospace components and financial services...
and other automakers.
Gear ratios:
1 | 2 | 3 | 4 | 5 | R |
---|---|---|---|---|---|
4.69 | 2.94 | 1.92 | 1.30 | 1.00 | 3.18 |
Maintenance
Volvo owners manuals list the transmission as fill for life, meaning that there are no scheduled transmission fluid changes under normal operating conditions. This is controversial and believed by some to be a major contributing factor to increased valve body wear, eventually causing transmission problems that require valve body repair or replacement, and possible transmission overhaul or replacement.Transmission experts recommend regular fluid changes, at least every 50,000 miles. Special fluid must be used. If incorrect fluid is used it will result in improper operation and eventual transmission failure.
Fluid
Fluid must meet the JWS 3309 specification. Dealers carry this fluid under varying designations.Applications
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