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Sonnax Transfer Case Pump Repair Plate

Sonnax Transfer Case Pump Repair Plate

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Accelerated wear of magnesium transfer case housings has been documented any time internal
parts move against the magnesium. This is especially evident in New Venture/New Process 136,
149, 236, 246, 261 and 263 transfer cases. The sharp edges of the aluminum pump locating
tabs cut through the soft magnesium, or other times the sharp edges of the OE U-shaped
insert wear a larger area above the pump tabs. A small amount of movement of the pump is
necessary to keep the pump centered on the output shaft. Any metal in contact with the magnesium
causes rapid fretting wear of the soft magnesium, resulting in pin hole leaks.
Sonnax transfer case pump plate kit 100246-02K eliminates all metal-to-magnesium contact
of the pump by replacing the OE pump tabs with low-friction plastic inserts, and eliminating
the U-shaped steel insert. The Sonnax tab design relocates contact away from the original wear
points, so any weld or patches on worn housings will not be disturbed.

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