Caterpillar Expands Transmission Line, Again

Posted on December 2, 2005

Caterpillar, which earlier surprised many in the market by introducing a pair planetary automatic transmissions designed for heavy-duty vocational on-highway applications, as well as a number of off-highway uses, has expanded its open market transmission offerings again.

Cat, through its OEM Solutions group, said it will introduce a new planetary automatic transmission, the model CX28, designed specifically for medium-duty on-highway applications. A totally new design, the CX28 has six forward speeds and one reverse speed with horsepower up to 400 (298 kW) and torque up to 1,250 lb-ft (1695 Nm). The CX28 matches up with the Cat C7 and C9 diesel engines.

"For decades Caterpillar has been building planetary transmissions for its construction equipment. We are now leveraging this expertise and applying it specifically to the transmission needs of on-highway customers," said Chris Schena, Caterpillar vice president, Motion and Power Control Division. "Our first step was introducing the CX31 and CX35 transmissions to vocational truck builders and end users earlier this year. The CX28 is another step forward."

Cat said it will begin production in 2006 with OEM availability to be announced at a later date. Cat parts and service support for the transmissions will be available through Caterpillar authorized facilities.

Larry Riekert, on-highway manager, Caterpillar OEM Solutions Group said
power take-off options are a major advantage with Cat’s new automatic transmission. The CX28 has three power take-off locations: two locations on the torque converter housing (2 o'clock and 8 o'clock) and a new high-output drive at the rear of the transmission. This rear drive can be fitted with a live yoke, a direct drive pump or a clutched adapter. “The resulting narrow profile provides excellent packaging flexibility,” Riekert said. He added the transmission has an electronic control module and will use industry standard J1939 communications protocol.

Caterpillar also said the CX31 and new CX28 automatic transmissions can now also be utilized in recreational vehicle applications.