Center support Drive Transfer Gear hub repair TOYOTA UA80 / UB80

   The central caliper is one of the main elements of the gearbox, ensuring the transmission of torque to the wheels of the car. Power transmission Gearbox support bearings are subject to high axial loads.
   The rear planetary gear mounted on the power train also contributes to increased axial loads. This design offsets the center of the bracket and increases the force on the journal bearings and the aluminum hub housing bearings. Such factors cause increased axial loads on the hub and vibrations. These vibrations are invisible to the driver. However, at a high mileage of 150,000 km/km, these vibrations have a destructive effect on the hub, causing, under certain conditions, rotation of the inner race of the gear ball bearing, which is mounted on the hub, forming a conventional aluminum housing. Center caliper is also called the second brake drum.
   As the steel cage rotates, it continues to saw through the aluminum hub, creating a gap between the hub and the bearing race; the vibration increases and becomes noticeable to the driver of the car when moving away.
places and picks up speed. The noise also comes from the main gear, it is caused by backlash in the bearings of the gear that transmits the drive to the hub.

Solution of the problem. 

1. Replacing the hub for a new one.

This option is the most expensive. A new hub is sold with Drive Transfer Gear and rear planetary ring gear for an average price of $700 to $1,200.

2. Repair.
Repairing the hub ball bearing seat costs only 88$. 

Repair process:

1. We dismantle the bearings and gears.
   We assess the degree of damage and repairability of the hub.
2. 
    
3. We weld a new layer of aluminum at the wearout place.

   

4. Milling to factory size.