Cummins Diesel TCC Shudder: A New Twist

A 2001 Dodge Ram 2500 4×4, with a Cummins Diesel Engine and a 618 transmission, was brought to a transmission shop with a complaint of TCC shudder. Three to four months prior to coming to the shop, the customer noticed a change in the TCC apply feel. He said that the TCC apply had suddenly become more aggressive or abrupt. The condition had worsened over the course of three to four months, until the start of the shudder issue. The customer was retired and used the vehicle to tow his camping trailer around the country. He had several performance enhancements added to the engine, including an aftermarket turbo. Since the engine performance was enhanced for better towing capacity, he did not complain about the firmer TCC apply until it developed into a shudder.

The transmission in the vehicle had been rebuilt at 93,000 miles, in January 2007. At that time, a rebuilt torque converter was also installed. The vehicle returned to the transmission shop in May 2008, because the torque converter bolts had come loose. During that repair, the flywheel was replaced, the torque converter was rebuilt and upgraded to include a billet cover. The TCC friction material was replaced, but the original piston and damper assembly had been reused.

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Article No.: TCTIP-06-09
Author: Ed Lee
Total Pages: 2

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