How Things Work: Four-Wheel-Drive Systems
The transfer case is a very simple concept. It is basically a power divider mounted on a transmission that is capable of splitting torque produced by the engine to drive both sets of axles on the vehicle.
What Went Wrong and Why: Root-Cause Failure Analysis
Comebacks will have many causes, including some that are beyond the shop’s control – such as human error and new parts that are defective right out of the box. If a shop is not running at a comeback rate of 5% or less, it will be dangerously close to failing as a business. This is because there are two costs involved in repairing a comeback: The first is the parts and labor invested for free in honoring your warranty; the second loss is called “lost-opportunity costs,” which reflect the fact that when working on a comeback you cannot be working on a paying job. We will examine here how to make a comeback into a positive experience even though it costs money, and how to cut your losses and protect yourself from further wasted labor and parts dollars.
Ratio Relations
What is little understood by the public is how much work goes into developing a new race car. The platform of the stock GTO is modified to the maximum the rules allow. The car will compete at 2,800 pounds and has 260 linear feet of roll cage in it. A fuel cell, a modified LS6 engine equipped with Crane cams and producing 420 horsepower at the rear wheels, adjustable gas shocks, racing brakes, an Exedy racing clutch and a Tremec T56 six-speed transmission all work to make this car capable of 160-180 mph.
ZF’’s New 6-Speed Truck Transmission
At this point, anyone working in our industry should be familiar with ZF transmissions. ZF Friedrichshafen AG is a world-class manufacturer of driveline components to the auto manufacturers. ZF designs and builds some of the most-advanced and sophisticated manual and automatic transmissions for cars and light trucks. The company also is big in medium- and heavy-duty on- and off-road transmissions as well as steering gear, and other driveline components.
The Rear Up Front
With four-wheel-drive and all-wheel-drive vehicles being produced in such huge numbers, these trucks and cars have become an important source of repair business for our industry. Transmissions and transfer cases are now a huge part of the repair and reman market. It is also obvious that these designs use both front and rear differentials to transfer power to both sets of drive axles. This has effectively doubled the amount of differential work that will find its way to the repair shop.
Breaking the Code on Encoders
Transfer cases have become quite sophisticated, and many designs have extensive diagnostic routines. From what we see on tech-line calls and in helping customers resolve field problems, there is a great lack of information and understanding at the shop level. This article is devoted to understanding the electronic shift functions of the New Venture Gear transfer cases.
Beginning Again – Happy New Year
2005 is now in the history books, and I hope all of our readers enjoyed the holidays. It is a time-worn habit to make resolutions and try to improve our situations for the new year.
Time is a human creation. All other forms of life and some primitive tribes do not have any understanding of time. They are driven by instinct, seasonal changes and their life cycles, but we are the only species that has created the concept of time. This ability to measure each day precisely and then make future plans is a blessing and, at the same time, the source of tremendous pressure, which is self-induced.
The Tremec T56 Six-Speed: Revolution and Evolution
Tremec, also known as Transmission Technology Corp., is a major producer of manual-transmission and drivetrain components. Tremec operates a world-class plant that is producing transmission products for many of the world’s major auto and truck manufacturers.
The Future for Manual Transmissions
When I speak of manual- (standard) transmission work, the category actually will include more than transmissions. This umbrella includes other driveline services: all types of transfer cases, differentials, and associated parts such as drive shafts, U-joints, and tires. The mix of transmissions in the marketplace is about 20% manual and 80% automatic.
Math for Mechanics
You can’t read or discuss anything about automobiles without getting into performance figures and estimates.
NV246: Understanding the Tricks
The New Venture 246 transfer case has been around since the 1998 model year. Found in GM K trucks (Tahoe, pickup, Yukon, Suburban, Suburban EXT, Escalade and Avalanche), this is a large, heavy-duty transfer case.
Understanding Synchronization
One of the least-understood and most-commonly misdiagnosed complaints/problems with manually shifted transmissions and transfer cases is synchronization.
