Tooth Contact Of HYPOID Driven 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 Hypoid Driven Gear Tooth Contact Pattern (Toe Side And Heel Side)
Courtesy of SUBARU OF AMERICA, INC.
- Face contact
  Check item: Backlash is too large.
  
  Contact pattern
  
  Fig 2: Identifying Hypoid Driven Gear Tooth Contact Pattern (Face Contact)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Tighten the differential side retainer to move the driven gear closer to the drive pinion shaft.
  
  Fig 3: Moving Driven Gear Closer To Drive Pinion Shaft
  Courtesy of SUBARU OF AMERICA, INC.
- Flank contact
  Check item: Backlash is too small.
  
  Contact pattern
  
  Fig 4: Identifying Hypoid Driven Gear Tooth Contact Pattern (Flank Contact)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Loosen the differential side retainer to move the driven gear away from the drive pinion shaft.
  
  Fig 5: Moving Driven Gear Away From Drive Pinion Shaft
  Courtesy of SUBARU OF AMERICA, INC.
- Toe contact (inside contact)
  Check item: Teeth contact area is too small.
  
  Contact pattern
  
  Fig 6: Identifying Hypoid Driven Gear Tooth Contact Pattern (Toe Contact)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Increase the thickness of drive pinion shim and tighten the differential 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 Shaft
  Courtesy of SUBARU OF AMERICA, INC.
- Heel contact (outside end contact)
  Check item: Teeth contact area is too small.
  
  Contact pattern
  
  Fig 8: Identifying Hypoid Driven Gear Tooth Contact Pattern (Heel Contact)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Corrective action: Reduce thickness of the drive pinion shim according to the procedures for moving the drive pinion shaft closer to driven gear. Also loosen the differential side retainer to move the driven gear away from the drive pinion shaft.
  
  Fig 9: Moving Drive Pinion Shaft Closer To Driven Gear
  Courtesy of SUBARU OF AMERICA, INC.