Legacy Outback Limited AWD F4-2.5L DOHC (1998)
Overdrive Assembly: Description and Operation
13. REDUCTION GEAR
Engine power is transmitted from the rear planetary carrier to the reduction drive shaft and the reduction drive gear. In an FWD vehicle, power is then
transmitted to the final gear through the reduction driven gear and drive pinion. In a AWD vehicle, power transmission to the front wheels is the same
as an FWD vehicle. Power to the rear wheels is transmitted from the transfer clutch hub, Welded to the side of the reduction drive gear, and passes
through the transfer clutch (multi-plate clutch), to the rear drive shaft propeller shaft rear differential rear wheel.
14. FINAL REDUCTION GEARS
General
The hypoid drive gear is mounted to the cast iron oil pump housing by double taper roller bearings. The hypoid driven gear and the differential are
mounted to the differential case. Both ends rotate and are supported by taper roller bearings in the converter case.
Hypoid Gear
The front end of the drive pinion shaft is supported by the double-taper roller bearing on the oil pump housing. The rear end is supported by two roller
bearings on the transmission case and extension case. The double-taper roller bearing is preloaded by tightening the lock nut to a specified torque via
the collar. The tooth contact of the hypoid gear is adjusted by changing the shim thickness between the double-taper roller bearing flange and oil pump
