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129 0505 Tran 05 Z

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An important part of a 700R4 upgrade is the input housing (upper left) with a 90-percent harder input shaft than stock. The shell (upper right) is modified for a Torrington bearing, hardened and reinforced. Using an O-ring rather than a lip seal, the forward clutch apply piston (lower left) is far less likely to cause troublesome leaks. A hardened forward and Reverse sprag race is at the lower right.