These are some of the frequently asked questions about driveshaft, axle and drivetrain noise.
The brake pedal can feel hard during the first couple of brake applications, usually in the morning when the temperature is cold. At cold start in high altitude, combined with the fast idle retard operation, the intake manifold vacuum supply is at its lowest, resulting in low booster assist.
Humans and animals have had the ball and socket joints for millennia. This simple design has been used on vehicles since the turn of the century because, well, it works. But, just as our hip joints grow feeble with use and age, the ball joints, tie rods and sway bar links on a car wear out as well. For humans, wear can be accelerated by injury, scar tissue and arthritis entering the joint. On suspension components, injured boots can cause contaminates like salt, sand and metal particles to enter the joint and cause wear.
Unless you’ve been living under a rock, you might have heard about the new regulations and requirements for R-1234yf usage. Not sure? Well, it’s time you crawled out from under that rock and get ready for some of these new regulations that will affect you and your profession.
Reducing brake drag on late-model vehicles is not done by a single component, it is a system. At the master cylinder on some vehicles, there might be a quick-take-up-valve in the replenish port to hydraulically pull the caliper piston back from the rotor. At the caliper, OEMs are using seals with a special profile designed to retract the piston. Some vehicles are even using the valves in the ABS module to electronically retract the pistons. On the caliper bracket, engineers are designing hardware that can push the pad away from the rotor.
The secret of Transit brake jobs is to match the friction material to the customer. Some pad manufacturers offer three options for the front and rear pads. The different formulations can suit fleets that use the Transit for city deliveries and others that carry heavy loads. Talk to your customer about how they use their vehicles.
Audi Tire Pressure Monitoring Systems (TPMS) are some of the easiest to reset and relearn. The automaker has used both indirect and direct systems during the past decade. Both systems use the same relearn procedure that involves accessing the TPMS settings through the driver information center or infotainment system. The only difference between direct and indirect systems is the last step that may involve driving continuously for 10 minutes or allowing the vehicle to sit for either 10 or 20 minutes.
There has been a lot of discussions this month about some OEMs restructuring subscription fees for service information and reprogramming/reflashing. Most of the restructuring is focused on charging users per vehicle reflashed. This has stirred up a lot of technicians and shop owners.
The first step in selling ride control is the inspection process. A visual inspection of the shocks and struts can tell you a lot about the state of the ride control units. If possible, visual inspections should be performed before the test drive. This is a chance to make sure the vehicle is road worthy before you put your own life at risk.