
Drivetrain Services
The drivetrain serves two functions: it transfers power evenly from the engine to all drive
wheels and it varies the amount of torque. The drivetrain may include the differential, a
transfer case (in four-wheel and all-wheel drive cars) and the transmission (see Transmission
Services).
Differential Service
The differential is the mechanical component that spins both the left and right wheels, but
lets them rotate at different speeds so that the vehicle can make turns. When a vehicle makes
a turn, the outer wheel has to turn faster than the inner wheel, due to the difference in the
length of the paths they take. The differential is located between the two wheels, and is
attached to each wheel by an axle shaft. Four-wheel drive vehicles have a separate
differential for each pair of wheels, connected through a transfer case.
Differential fluid provides lubrication to gears, bearings, shafts and other internal components.
Heat, pressure and friction can slowly breakdown the additives in the differential fluid. In
addition, small particles of metal and clutch material may come off as they wear and these
particles can mix with the fluid. Fluids can also become contaminated with water.
Our service includes: evacuating the old differential fluid and filling the differential with
manufacturer recommended type and quantity of new fluid
Transfer Case Service
Transfer cases are found on four-wheel drive and all-wheel drive vehicles. This gearbox
divides the transmission power output between the rear differential and the front differential.
Most transfer cases allow the front wheels to be disengaged and spin freely during normal
driving conditions. When desired, power is transferred to all four wheels.
Transfer case fluid provides lubrication to gears, bearings, shafts, and other internal
components. Heat, pressure and friction slowly breakdown the additives in the transfer case
fluid. In addition, small particles of metal may come off the gears as they wear; these metal
particles can mix with the fluid. Fluids can also become contaminated with water.
Our service includes: draining the old transfer case fluid filling the transfer case with
manufacturer's recommended type and quantity of new fluid

Serving Northern California in Chico and Paradise for over 20 years.
Locally Owned and Operated