The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere. The different layers of the atmosphere The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth's surface, is called the exosphere.
Front differential or power transfer unit repairs are less common. The only parts sold by Land Rover are the outer seals. Worn bearings require replacing the whole unit at a cost just shy of $1800.00. We dismantled the unit and found only one worn bearing at a cost of $40.00.
The T bearing currently sells for $50 per unit. Variable costs incurred to produce the T bearing are $30 per unit; variable costs to produce the new S bearing would be $60 per unit. The Electric Division has found an external supplier that would furnish the needed S bearings at $100 per unit.