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Power Strokes
6.4 Aftermarket
MCC / DIY Tuning for 6.4
Trans tuning thread?
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[QUOTE="scorpion6.7, post: 545277, member: 9736"] it is basically a startegy that starting in 2nd sometimes 3rd gear partially slips the tcc, it is why most manufacturers use black high carbon content clutches. Starting with partial coverage in 1997 and continuing with 1998 and later vehicles, the TCC strategy changed again. Similar to what we've just covered, the new strategy allows for the converter clutch to begin slipping as early as 2nd gear and to continue slipping until a cruising speed of approximately 54 mph has been reached. For this type of strategy to be successful, the type of material used for the clutch had to change. It should be noted that the original ON/OFF strategy utilized a cellulose-based converter clutch, otherwise known as a paper-lined clutch. The second strategy utilized a Kevlar-based lining (several designs, depending on 2WD, 4WD, heavy-duty, etc.) and for this third strategy, a carbon-based woven lining is used. This type of converter clutch apply is referred to as Electronically Controlled Clutch Capacity (ECCC), or EC 3 , for short. In addition to these changes in material, the tension of the damper plate springs, which are integral to the clutch disc, was also altered. These springs act as shock absorbers, and their tension has progressively lightened from the ON/OFF strategy all the way through to the ECCC strategy. Should anyone modify the PWM or ECCC strategy to function as an ON/OFF apply while using a converter with a damper plate designed for PWM or ECCC, a tail end bump on the apply of the clutch would be felt, possibly resulting in a customer complaint. In some cases, a code for Converter Clutch Stuck On may also occur as a result of this modification to ECCC strategy vehicles. [/QUOTE]
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