June 2017 Archives - Transmission Digest
Under the Lift

As one being involved with diagnosing transmission issues, developing technical information for seminars and bulletins as well as writing technical repair manuals, the one aspect of the transmission business I rarely think about is the R&R process. In Canada I hear them say “Ree and Ree” which is a nice quick way of describing the process of removing and re-installing the transmission. The lack of attention on this aspect of the transmission business does not indicate that it is insignificant. In fact, removing and re-installing transmissions is a critical aspect of the business. It is hard work and requires talent to do the job right.

June 2017 Issue

In This Issue
Audi 09L – ZF6HP19A: Gear noise, transfer-case gear train failure
ZF5HP24 Delay/Slips in Reverse
GM 4L60/70/75E

Creating New Markets

Recently, Eastern Transmission of has assembled specialty kits to compete with scrap yards and has taken on specialty repairs to develop new areas of expertise. Moreover, the business has become a distributor of Raybestos Powertrain parts, adding value not only as a separate venture but also as a user of the company’s products, said Stephen Svetliza, who spoke for his brother Andrew and father Marcelo. The shop is in St. Laurent, Quebec, a suburb of Montreal.

TCC Vibration, Judder or Shudder Misdiagnosed

Malfunctioning mounts are notorious for causing a wide variety of vibration complaints including what is often thought of as a converter clutch vibration, judder or shudder; particularly so with vehicles that perform cylinder deactivation for fuel economy.

Give ’Em an Upgrade

This half-ton carryall came to us with an illuminated malfunction indicator light (MIL), accompanied by P0300 (random misfire) and P0304 (cylinder 4 misfire) codes. During our test drive, the MIL also flashed.
With 180,000 miles, a plethora of possibilities existed for the root cause, so I began with a GM original: the Strategy-Based Diagnostic Chart.

Hiring the Best and the Brightest

Hopefully your recruiting effort brings you a number of qualified applicants for any job you have available. Your next challenge will be to choose the best person or people from those candidates.

Hydraulic & Fluid Controls in Dual-Clutch Units

To recap, we have looked at how the dual-clutch transmission functions, essentially two gear boxes in one with the input shafts driven by hydraulically applied clutch packs that drive three concentric shafts that are one inside the other. The innermost shaft drives a gerotor-type of fluid pump that provides pressurized fluid to actuate the dual clutches, lubricate and cool the components, and shift the transmission into the selected gear. The next two shafts are driven by the two clutch packs with one shaft shifting the even-number gears and one shifting the odd-numbered gears.

Don’t Let a Boska Get You Down

A boska might be bossy, but somebody’s got to be in charge, and it’s not always easy. The next time you’ve spent your day trying to please someone you perceive as being a tough boss, challenge yourself to grow as a person and as a professional. Learn to work with that boss and fight through the challenge.

Hayden: Cool Stuff

As for the transmission builder, Miller points out that the transmission being rebuilt has already failed under the conditions the vehicle owner puts the car through. It would only make sense that a heat failure should be addressed by decreasing the possibility of such future failures.

Use TSB’s in Your Diagnostic Routine

When diagnosing today’s complex vehicles, we have a wealth of information at our disposal. How we use that information is crucial in making the correct diagnosis the first time, every time. In some cases the diagnosis may be cut and dry (fluid is burnt, the pump is whining, and the vehicle will not move). In other cases, the diagnosis may not be as easy, or worse; we may “think” or “assume” we already know the problem.

Sonnax Vacuum-Test Layout – 45RFE

Sonnax Vacuum-Test Layout – 45RFE