Tooth Contact Of HYPOID Gear

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

Adjust until the tooth contact is correct.
Check and adjust the tooth contact with following.

Tooth contact
Checking item: Tooth contact pattern is slightly shifted toward to toe side under no-load rotation. [When loaded, contact pattern moves toward heel.]

Fig 1: Identifying Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.
Face contact
Checking item: Backlash is too large.

Contact pattern

Fig 2: Identifying Face Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.

Corrective action: Increase thickness of drive pinion shim in order to move drive pinion away from driven gear.

Fig 3: Identifying Corrective Action For Face Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.
Flank contact
Checking item: Backlash is too small.

Contact pattern

Fig 4: Identifying Flank Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.

Corrective action: Reduce thickness of drive pinion shim in order to bring drive pinion close to driven gear.

Fig 5: Identifying Corrective Action For Flank Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.
Toe contact (Inside end contact)
Checking item: Contact area is small.

Contact pattern

Fig 6: Identifying Toe Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.

Corrective action: Increase thickness of drive pinion shim in order to bring drive pinion close to driven gear.

Fig 7: Identifying Corrective Action For Toe Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.
Heel contact (Outside end contact)
Checking item: Contact area is small.

Contact pattern

Fig 8: Identifying Heel Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.

Corrective action: Reduce thickness of drive pinion shim in order to move drive pinion away from driven gear.

Fig 9: Identifying Corrective Action For Heel Tooth Contact Of Hypoid Gear
Courtesy of SUBARU OF AMERICA, INC.