Depending on the design of your differential, this can be a very messy or a very tidy job. Some differentials have a drain plug; others require you to remove the housing cover. In either case, you'll need a wide catch pan; a plastic dropcloth beneath that would be good insurance.
Drive your vehicle for a few minutes to warm the oil, then change into your grungy clothes—you'll probably get dirty. It's just changing oil, right? Nothing that complicated, but brace yourself, because old car differential oil has the foulest smell in the automotive world.
With that warning, remove the fill-hole plug at the top of the diff casing, then unscrew the drain plug. If you don't have a drain plug, unscrew the housing bolts, leaving a couple of bolts on top loosely attached to hold the cover in place. Using a standard screwdriver, pry open the cover gently or the oil will gush out and cover you in that unholy stink.
Be careful not to mar the surface of the differential housing. Let the oil drain completely, then remove the cover. Assume that all the leftover oil in the axle is loaded with metal shavings. If you're an oil-changing Boy Scout, you don't have to worry about this, but the rest of us should take the time to wipe the remaining oil out of the housing, the gears, and the wet side of the housing cover. Make sure to get it all, because there could be some shavings hiding in the nooks and crannies.
UTI programs prepare graduates for careers in industries using the provided training, primarily as welding technicians.
Some UTI graduates get jobs within their field of study in positions other than as a technician, such as certified inspector and quality control. Welders, Cutters, Solderers, and Brazers, viewed June 2, UTI programs prepare graduates for careers in industries using the provided training, primarily as collision repair technicians. Some UTI graduates get jobs within their field of study in positions other than as a technician, such as appraiser, estimator and inspector. Automotive Body and Related Repairers, viewed June 2, UTI programs prepare graduates for careers in industries using the provided training, primarily as diesel technicians.
Some UTI graduates get jobs within their field of study in positions other than as a diesel truck technician, such as maintenance technician, locomotive technician and marine diesel technician. MMI is an educational institution and cannot guarantee employment or salary.
MMI programs prepare graduates for careers in industries using the provided training, primarily as motorcycle technicians. Some MMI graduates get jobs within their field of study in positions other than as a technician, such as service writer, equipment maintenance, and parts associate. Motorcycle Mechanics, viewed June 2, MMI programs prepare graduates for careers in industries using the provided training, primarily as marine technicians.
Some MMI graduates get jobs within their field of study in positions other than as a technician, such as equipment maintenance, inspector and parts associate. Motorboat Mechanics and Service Technicians, viewed June 2, For details, contact the program representative at the campus you are interested in attending. UTI programs prepare graduates for careers in industries using the provided training, primarily as CNC machining technicians. Some UTI graduates get jobs within their field of study in positions other than as a technician, such as CNC operator, apprentice machinist, and machined parts inspector.
For program outcome information and other disclosures, visit www. See Table 1. Bureau of Labor Statistics, www. Students are responsible for any other costs such as lab fees associated with the course.
Bureau of Labor Statistics projects an annual average of 61, job openings between and Job openings include openings due to net employment changes and net replacements.
Bureau of Labor Statistics projects an annual average of 43, job openings between and Bureau of Labor Statistics projects an annual average of 24, job openings between and Bureau of Labor Statistics projects an annual average of 13, job openings between and Bureau of Labor Statistics projects an annual average of 11, job openings between and Bureau of Labor Statistics projects that total national employment for Automotive Service Technicians and Mechanics will be , by Bureau of Labor Statistics projects that total national employment for Automotive Body and Related Repairers will be , by A set of gears inside the axle direct this torque at a 90 degree angle to each wheel.
These gears also provide a gear reduction , which means that the wheels turn slower than the propeller shafts, but the torque is multiplied. Without this gear reduction, your engine would not have enough torque to move your vehicle effectively. Some axles also contain a limited slip or locking device that maximizes traction by making sure that both wheels are able to turn in slippery situations.
There is a LOT of torque going through your axles, and the gears inside are under a lot of pressure! In order to last, they need to be properly lubricated. Every front or rear axle is filled with a special oil also called differential fluid , or gear oil that takes care of this.
The differential fluid lubricates the gears, bearings and other internal parts, and provides cooling to these components as well. Like most automotive fluids, differential gear oil eventually loses its ability to do its job properly. Gear oil contains several chemicals and additives that only last so long:.
With proper maintenance, most drivers can expect their front and rear axles to outlast their vehicle! Find an even surface that is strong enough to support the weight of the vehicle beneath a jack and jack stands. Never jack up a vehicle on grass, dirt or gravel as the jack may topple over. Jack up one rear wheel. Slide a scissor or trolley jack beneath one of the designated jack points on the rear of the vehicle. Lift the vehicle up high enough for you to access the rear differential comfortably and safely.
The height required to comfortably access the differential will vary from vehicle to vehicle. Place a jack stand beneath the car. Once you have jacked up one side of the car high enough to work beneath it, you'll need to place a jack stand beneath it so you can lift the opposite side.
Slide the jack stand under one of the vehicle's jack points and raise it to the appropriate height to come into contact with the bottom of the car. Jack up the other side of the car. With the jack stand in place on one side, find the designated jack point on the other side of the car and raise it as well.
At this point, the rear of the vehicle should be in the air. Place another jack stand beneath this side of the vehicle to support it as you did on the other side.
Be sure the jack stands are holding the vehicle and that it is stable. Repeat the process on the front of the vehicle. The entire car will need to be off the ground and level in order to accurately check the level of gear oil in the differential, so all four wheels will have to be off the ground.
Jack up the front of the vehicle and place jack stands beneath it to support its weight. If you have access to a lift, it is a much faster and easier way to raise the vehicle at an even height. Part 2. Locate the rear differential. Only vehicles that are powered by their rear wheels or all four wheels will have a rear differential.
You can locate it by following the drive shaft that travels the length of the car, from the transmission to the rear differential, or by looking for the pumpkin shaped metal object mounted between the rear wheels. Once you find the differential, visually inspect it for signs of damage and to locate the drain and filler plugs. Clean the area around the service port. To prevent this, clean the area surrounding the service port with brake cleaner and a steel bristled brush.
Use the brush to remove large deposits of stuck on dirt.
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