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Archive for March, 2009

The Quick Guide To Your Car’s Axle Seal Replacement

If the axle seal on your car is worn or broken, you’ll be able to tell easily. You’ll notice an oil spot on your driveway that gets larger day by day. However, leaking oil can spell trouble for a differential and more importantly, your transmission. In this article, we’ll explore what happens when this part develops a problem. I’ll describe how to identify it and fix it.

Differentials: An Overview

Your vehicle’s differential is the part that takes the power coming from the transmission and drive shaft, and splits it between two wheels. In doing so, each wheel is allowed to turn at different speeds with equal torque.

In any car, the gears within the differential are required to mesh at very high speeds, thus the fabrication tolerances are extremely small and the lubricants are well-suited to “high shock” environments. Secondly, since the differential is connected to the transmission, the axle seal and gear oil function to keep rocks, dirt, and other debris from entering and causing serious damage.

Signs Of A Faulty Axle Seal

Many fluids can drip from your car and should be inspected accordingly, but a broken axle seal causes gear oil to drip. Gear oil has a distinct smell similar to rotten eggs (because of the sulfur content). In addition, gear oil is much thicker than similar lubricants in order to protect the gears as they move at high speeds. The viscous fluid is engineered to stick to the gears, providing maximum coverage and lubrication.

In many cases, a seal break isn’t the product of driver error or carelessness, but rather the actions of a mechanic or someone on the assembly line in the factory. If the axle is improperly removed or replaced, the seal is likely to rip in the process.

Replacement Of The Unit

To replace the torn seal, first pry it out of the differential. You can accomplish this by hand, but the better solution is to use a seal removal tool. Once you remove it, grab the replacement part and installation tool. Each installation tool will come with a set of rings; choose the one that is able to fit snugly into the mount point and slightly smaller than the seal itself. Finally, insert the tool into the mount on the differential and firmly tap with a hammer to fix the part. If you accidentally tap it too hard, the replacement could become deformed or tear a second time.

Depending on your vehicle, test the differential movement after the install to ensure everything is meshing properly. Then, replace the differential cover and reinstall the axle. As a final precaution, take the car for a quick drive to make sure everything is working correctly.

If you have worked on cars before, you should be able to perform this job easily. Of course, as I always suggest, take your vehicle to a trained mechanic if you’re uncertain of your ability. When it comes to this part, spending a few dollars is worth the peace of mind.

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March-9-09

Are Certified Used Vehicles Here To Stay?

Posted by admin under cars

Are Certified Used Vehicles Here To Stay?

Over a decade ago, the first certified vehicles began appearing on a few dealership lots. Back then, it was a creative strategy for dressing up used cars so the dealers could remove the “used” part of the name. After all, a lot of vehicles that were in perfect condition were coming off short-term leases or being traded in by their owners. The dealers needed a way to take move the inventory without holding the resale value down by selling them as “used.”

Enter the certified vehicle. A car is inspected by a team of auto technicians in order to determine whether it’s in good enough condition to warrant being prepared for certification. Today, nearly every automaker certifies its vehicles as long as they have met certain conditions. In this article, I’ll explain the process of certification and what to do when you need to have repairs performed.

How A Car Receives Certification

When a model comes off a lease or is returned by its owner, a dealership will consider whether it’s a good candidate for certification. If it is, the car is entrusted to a team of auto technicians. That team will use special equipment to bring the parts, systems, and performance back to their original specs (or as closely as possible). Once their work is complete, a limited warranty is offered to make prospective buyers feel more comfortable.

How are candidates for certification chosen? First, each automaker has a given set of standards by which a car is measured before it is even considered. For example, it can’t be more than a certain number of years old. The odometer must not exceed a certain number of miles. If it passes the initial phase of tests, the model undergoes a rigorous inspection that includes review – and possibly upgrading – of all of its parts and systems.

Once the process has been completed, a limited warranty (usually 24 months) is offered to prospective buyers. Normally, the limited warranty will cover repairs and replacement of the powertrain, A/C unit, and the parts that comprise the electrical system.

When You Need To Have Repairs Done

Before purchasing a certified vehicle, find out what entity has offered certification. Drivers often think that an automaker has certified their car and are surprised to discover that the dealership actually did. The difference is that an automaker will cover the cost of any repairs covered by the warranty regardless of which dealership you visit. It doesn’t matter if you relocate in the future; if your powertrain malfunctions, you’ll have recourse.

Also, when you take your certified car in for repairs, make sure that you tell the auto mechanic about the certification and the underlying warranty. They often won’t know and won’t check.

Are pre-owned certified vehicles here to stay? Definitely. They represent a cost-effective alternative to newer models with the peace of mind that many used models cannot provide.

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