November 2006 Archives - Transmission Digest
The Great Unknown

Replacing parts is the last step in the repair process. The first step should be a methodical diagnosis to isolate the cause of the malfunction. This is not possible unless you understand how the component you are working on is supposed to operate and how it is related to the other systems that make up the modern motor vehicle.

You Can’t Get a Lot for a Little!

Although some customers will try to get away as cheaply as possible, most realize that they have to at least pay a fair price to get a car fixed properly. Fortunately for us, people who place quality and service above price outnumber those who don’t by four to one. That means that about 80% of your customers are far more motivated by the look and the feel of the service than the price of it.

Cooling Off the Pre-heater and After-Glow

The Isuzu/GMC Forward Tiltmaster truck (otherwise known as the NPR/W4/4000) with a diesel engine and the JF506E transmission has a setup for recovering engine coolant that has been known to cause hard starting or a no-start condition. And it always seems to become a problem after the transmission needs repair; at least, that is what the customer says until you finally figure out what is the real cause of the problem.

What’s the World Coming To?

You may be familiar with a transmission called the JF506E, which in the North American market can be found in the VW Jetta, Golf and GTI; the Mazda 6 and MPV; the Jaguar X Type; and the Land Rover Freelander. It is manufactured by Japanese Automatic Transmission Co. (JATCO). In Europe the JF506E is in vehicles such as the VW Golf and Sharan, the Land Rover Freelander, the Jaguar X Type and the Ford Mondeo, to name a few. And the company said something to this effect: “You build the car and we will make this transmission fit it. The transmission will be versatile enough to accept programming of the computer to meet various strategies desired by the car manufacturer using the transmission.”

4L60-E Flares on 2-3 Shift (Now What?)

In past TASC Force™ Tech Tips, I have stressed the benefits of testing electrical circuits by measuring current draw. I have also commented that finding new information adds pieces to the puzzle and helps to bring the whole technical picture into better view. This month’s topic is an example of using current-draw testing to uncover an additional cause for 2-3 shift flare on 4L60-E transmissions.

Changing Converter Designs Change Your Approach

The 10-inch front-wheel-drive Chrysler converter used in the 604 and 606 (41TE & 42LE) transmissions has undergone some changes in recent years. From the outside you can see that the surface of the impeller, smooth on the earlier models, now has dimples (see Figure 1).

November 2006 Issue

In This Issue
Lexus A761E: Preliminary Information