4R100, 5R110W

Heavy Duty Input Shaft
Part No. 36670-HD

OE Part No. F81Z-7017-EA

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Input shaft failure is common as power levels are increased in Ford 4R100 and 5R110W units. Sonnax heavy duty input shaft 36670-HD is precision-engineered for unrivaled performance in high horsepower gas and diesel applications. Machined from 300M ultra high-strength steel for exceptional toughness and manufactured with rolled splines for resistance to spline-twist and breakage.

  • Suitable for any high-horsepower street, towing or competition application
  • Rolled splines for increased durability
  • Specially heat-treated and processed for maximum toughness and straightness
  • Manufactured from 300M ultra high-strength steel for maximum strength and resistance to fracture
  • 36670 hd