Tooth Contact Of HYPOID Gear

WARNING: This page is about a different variant/trim than selected.

Adjust until correct teeth contact is obtained.
Check tooth contact, and perform the adjustment as follows.
- Correct tooth contact
  Check item: Tooth contact surface is slightly shifted toward the toe side under a no-load condition. (When driving, it moves towards the heel side.)
  
  Fig 1: Identifying Correct Tooth Contact Pattern (Toe And Heel Side)
  Courtesy of SUBARU OF AMERICA, INC.
- Face contact
  Check item: Backlash is too large.
  
  Contact pattern
  
  Fig 2: Identifying Tooth Face Contact Pattern (Backlash Is Too Large)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Tighten the side retainer to move the driven gear closer to the drive pinion.
  
  Fig 3: Moving Driven Gear Closer To Drive Pinion
  Courtesy of SUBARU OF AMERICA, INC.
- Flank contact
  Check item: Backlash is too small.
  
  Contact pattern
  
  Fig 4: Identifying Tooth Flank Contact Pattern (Backlash Is Too Small)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Loosen the side retainer to move the driven gear away from the drive pinion.
  
  Fig 5: Moving Driven Gear Away From Drive Pinion
  Courtesy of SUBARU OF AMERICA, INC.
- Toe contact (inside contact)
  Check item: Teeth contact area is too small.
  
  Contact pattern
  
  Fig 6: Identifying Toe Contact Pattern (Teeth Contact Area Is Too Small)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Increase the thickness of drive pinion shim and tighten the side retainer to move the driven gear closer to the drive pinion shaft according to the procedure for bringing drive pinion shaft away from driven gear.
  
  Fig 7: Moving Driven Gear Closer To Drive Pinion
  Courtesy of SUBARU OF AMERICA, INC.
- Heel contact (outside end contact)
  Check item: Teeth contact area is too small.
  
  Contact pattern
  
  Fig 8: Identifying Heel Contact Pattern (Teeth Contact Area Is Too Small)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Reduce the thickness of drive pinion shim and loosen the side retainer to move the driven gear away from the drive pinion according to the procedure for moving drive pinion shaft closer to the driven gear.
  
  Fig 9: Moving Driven Gear Away From Drive Pinion
  Courtesy of SUBARU OF AMERICA, INC.