Industry News

| December 12, 2008

Caterpillar is developing two heavy-duty automatic transmissions to match with its on-road vocational truck engines.

Caterpillar will begin production of the torque-converter-type CX31 and CX35 transmissions this year, with availability in 2006.

The CX31 has six forward speeds and one reverse, while the CX35 has eight forward speeds and a reverse. Both have lockup torque converters and electronic controls.

The CX31 matches with C11 engines up to 370 hp, C13 engines up to 430 hp, and C15 engines up to 500 hp and 1,650 lb.-ft. of torque. The CX35 matches with C15 engines up to 625 hp and 2,050 lb.-ft. of torque.

The transmissions are “based on proven technology from Caterpillar articulated trucks,” the company says, but the transmissions will be new models, extensively redesigned.

“When packaged with a Cat on-highway engine, these transmissions will give vocational truck customers the option for one source for a fully integrated powertrain, which means product support is greatly simplified,” says Gerry Shaheen, Caterpillar Group president.

The CX31 offers three possible power takeoff locations with a rear option providing up to 200 hp. The CX35 provides four possible PTO locations, including two optional rear PTOs with up to 200 hp each.

Additional features include hydraulic braking retarders and either a transmission-mounted or remote-mounted oil filter.

International Truck and Engine will enter the Class 8 engine market with products in the 11- to 13-liter range starting in fall 2007.

The engines will be available only in International trucks, but “we’ll continue to offer Cummins and Caterpillar engines as well,” says Roy Wiley, a company spokesman.

International also is expected to continue collaborating with Cummins on engine components.

The new engines, which will use exhaust gas recirculation emission technology, are the first fruits of an agreement announced Dec. 6 between International and a German company, MAN Nutzfahrzeuge.

International and MAN are collaborating on engine and truck design and manufacturing, Wiley says.

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