January 3, 2007


New ACDelco clutch can improve transmission smoothness on some GM vehicles

Grand Blanc, Michigan – ACDelco has announced it has released new torque converter pressure plate assembly part numbers of its Electronically Controlled Capacity Clutch, or EC3. The parts are applicable to selected 1997 and newer GM vehicles, which can correct troublesome transmission conditions such as glitches, roughness, hesitation or slippage.

While providing a direct mechanical coupling between the engine and transmission, the lockup converter clutch historically could only be operated at limited engine speeds without the vehicle experiencing noise, vibration and harshness (NVH). The EC3 technology, patented by General Motors and released under the ACDelco brand name, expands the operating window of the converter clutch by controlling the clutch. The engine and transmission can slip relative to each other in areas where full lock-up was not previously acceptable from an NVH standpoint. The partial lock-up also improves driveline efficiency, resulting in enhanced fuel economy.

“Our customers have been asking for this technology and we’re proud to be able to bring it to market,” says Chris Thomas, GM Parts Powertrain Business Line Manager. “While our competitors have similar offerings, ACDelco’s EC3 technology is industry-exclusive because it’s produced for Original Equipment GM applications only.”

ACDelco is launching ten new torque converter pressure plate assembly part numbers, eight of them including the EC3 technology. Applications include select 1997 model year and newer GM cars and light-duty trucks.

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