4R100 Flow Issues
The 4R100 has come by its flow problems honestly. It has inherited them from the E4OD.
May 2006 Issue
Issue Summary:
In Dodge trucks & vans with RE rear-wheel-drive units, the transmission shuttle-shifts, and governor pressure and governor-pressure-sensor voltage are erratic.
Electronic noise on the TPS-signal wire is the most-likely cause of RE RWD transmissions cycling in and out of lockup.
In 1990-93 Honda Accords equipped with an “S” or “Sport” light, the light stays on all the time. In other vehicles the “D4” light remains on.
Broken pump gears and/or a severely damaged pump assembly may result in no movement in Dodge, Chrysler, Hyundai & Mitsubishi vehicles with F4A41/42/51-series transaxles.
Switch Hitter
When the owner was asked whether this was a problem before the truck came in to have the transmission replaced, he said it wasn’t but that the alternator had been replaced recently. Hmmm, could there be a “connection?” (No pun intended)
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.
Being Nice Pays Off like a Slot Machine
Some of the most-successful business people in the world are also some of the most gracious. When you talk with them they make you feel important, that what you have to say matters, that you are their only concern at that moment. Just think how successful you might be if every one of your customers felt that way about you and your company. The key is to have people say, “Wow, what a great experience I had with the person I dealt with at ….”
All Fired Up
The doodad we’re going to discuss here is an optional one that is installed by Ford Fleet Services, a subsidiary of Ford Motor Co. Ford Fleet installs systems in fleet vehicles such as police cars that include items like the flashing roof lights, sirens, Kevlar‚ lined trunks etc. Ford Fleet also installs a fire-suppression system, which is the one we’re going to discuss here.
Baby, It Was Cold Outside
For those whose business increased, it was all about an attitude adjustment and application of the techniques they had learned. One multi-shop owner reported that one of his locations that had averaged $10,000 a week in sales pretty much forever did $10,000 in the first two days after the manager got back from the seminar. He attributed the striking increase to his manager’s new attitude toward the customers and the business. It was like all of a sudden the light bulb went on and he realized that you can be nice to the customers and aggressive about marketing your products and services to them at the same time, that selling them what they need isn’t a turn-off to them, but not giving them the opportunity to buy is.
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.
April 2006 Issue
Issue Summary:
At the start of production for the 1997 model year the input shaft has been redesigned in the area of the O-ring groove at the torque-converter end.
After overhaul, vehicles equipped with the MP6 or MP7 transaxle may exhibit a complaint of falling out of Drive at a stop or a slipping condition on takeoff.
Before or after overhaul, vehicles equipped with the MP6 or MP7 transaxle may exhibit a slight engagement delay in “D” and/or a binding condition in reverse.
Before or after overhaul, vehicles equipped with the MP6 or MP7 transaxle may exhibit delayed or no reverse when hot.
1996-and-up vehicles equipped with the TAAT transaxle may exhibit harsh upshifts and/or down-shifts and may have diagnostic trouble code P0746 or P0789.
Time to Change an Old Habit
Our industry is reporting an increasing number of converter leaks that are coming from this area. The normal stresses that are being exerted on the converter during acceleration – plus the extra stress of lockup apply – are causing the converter to flex. And the culprit is the sharp angle at the edge of the lockup surface (see Figure 1), which creates a flex point for a crack to start.
A Fix for 5R55W Front-Planet Bearing Failure
The 5R55W transmission was used in Ford Explorers and Mercury Mountaineers from 2002 through 2004. This unit is very similar to the other 5R55 series transmissions, but each model has a few unique differences.
New Does Not Mean Good
As if the transmission industry weren’t difficult already, technicians also have to contend with new or remanufactured products that malfunction right out of the box.
