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Message: [QUOTE="ThreeFitty, post: 1391596, member: 16870"] Found the part number myself and finally got a price from the dealer, $3800 out the door for the HD4R100 with the same 3 year/unlimited mile warranty, here is a list of what is different between the regular and the HD that I found on another forum ______________________ Enhanced Torque Converter for better performance and longer life Oversize one piece case bushing for improved durability Enhanced Forward, Direct, and Intermediate Friction plates for longer life under heavy load shifts All new special upgraded steel plates Center Support Enhancements for improved gear train life Mercon V-OIL for greater heat resistance Oversize Pump Gear Set for improved oil flow Upgraded Extension Housing Bushing for improved durability 45 Element Intermediate Sprag for greater strength to withstand heavy loads Special coast clutch drum for improved engine braking and increased durability All new iron planetary assemblies for improved durability All new one way clutches for improved durability All new electronics for improved reliability Revised calibration gives better shifts for heavy duty use Improved gasketing for reduced leaks [/QUOTE]

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