Monthly Archives: April 2021

Question: I was told I need to have my transfer case serviced. What is that?

Question: I was told I need to have my transfer case serviced. What is that?

Answer:   On a four-wheel-drive (4WD) vehicle, power needs to be transferred to both the f ront and rear axles.  The transfer case is the mechanism that makes that happen.  There are many drivetrain configurations out there, so we’ll just talk in generalities. Trucks and larger SUV’s are often primarily rear-wheel-drive.  When the driver (or the vehicle’s computer) selects 4WD, the transfer case also sends power to the front axle.  The transfer case may also contain an additional gear set for off-roading. The transfer case is lubricated and cooled by special gear oil.  Over time, the oil gets contaminated and needs to be changed, just like your engine oil and transmission fluid.  Your vehicle manufacturer will have a schedule.  Your service advisor can help. Now many vehicles have all-wheel drive (AWD).  AWD vehicles are often based on a front-wheel-drive or rear-wheel-drive vehicle with the addition of a center differen ... read more

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