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   EXEDY has improved their already durable clutch with 3-4 friction plates for the 4L60/E family by incorporating micro-waves in the design.  This design has undergone 22 months of extensive durability testing and is now available via Marken Performance.  Micro-wave technology is used in current vehicles to help fuel mileage by considerably reducing parasitic drag in unapplied clutch packs.  Using this methodology, micro-waves applied to the 3-4 clutch dramatically reduces heat generated in 1st and 2nd gear by keeping the plates cooled and separated prior to apply. 

   The 4L60/E family has long been haunted by premature 3-4 clutch burn-up; a decades-long problem where builders are seeking longevity.  Over the years there have been various attempts to address this: from the changing the friction material and steel plate thicknesses, to the aftermarket trying extra thinner plates and single-sided plates but none of these addressed the root cause until now. 

   Part # EFK173HP1 includes (6) .080” thick waved 3-4’s.
   Part # EFK227HP1 includes (7) .065” thick waved 3-4’s.

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