January 2008 Archives - Transmission Digest
January 2008 Issue

Issue Summary:

After overhaul or valve-body removal a VT20/25E continuously variable transmission In a Saturn Vue does not change ratios.

After overhaul, a Ford truck equipped with the 5R110W “Torque Shift” transmission may exhibit no torque-converter-clutch application and/or diagnostic trouble code P0741, torque-converter clutch stuck off.

A 5R110W in a Ford truck has no TCC application after overhaul, but a scan indicates that the signal for lockup was given.

Before and/or after overhaul, a Ford truck equipped with a 5R110W transmission may exhibit a noticeable delayed forward engagement and/or chatter while in first gear at various throttle openings.

Falling Through the Cracks

And that is exactly what happens with a ZF 5HP24 transmission in an Audi, Jaguar or BMW. This problem will produce code P0731 (or P1722 with Jaguars) and it means a gear-ratio error in first. And it also may be accompanied by a complaint neutralizing at a stop when hot. The technicians on Transmission Rebuilders Network Worldwide (TRNW) are all too familiar with this problem. Yet, technicians around the country frequently allow this problem to fall through the cracks, which is why I thought of writing an article about it.

10 Ways to Destroy a Successful Transmission & Auto-Care Business

So here they are – my top 10 ways to kill a business. Avoid them and you should be just fine.

Clutch-Release Clearance 101

In a torque converter, clutch-release clearance (CRC) is the distance that the torque-converter-clutch (TCC) piston travels from the release to the apply position. This distance is also the amount of free play that is available to the clutch or clutches when the TCC piston is in the release position.

Avoiding After-Overhaul Problems

Being an R&R technician is challenging work. Even worse, you can make the job harder with one little slip or missed step. All it takes is forgetting to disconnect a wiring harness before dropping the transaxle: Before you know it, the transmission jack is coming down but the transaxle is suspended in mid-air by the harness. Once the transaxle is repaired and installed in the car, you have to diagnose and repair some new electrical problems that were not there before the rebuild. You can avoid this mistake and many others by new technicians by providing them with just a little training and a basic checklist of things that have to be done during every removal and installation of a transmission.

2008: Will It Be Great, or Will It Be Too Late?

I have always believed that to be successful one must have a positive outlook on life. Whatever you do should be done with passion and excitement, and to the best of your ability. If you don’t enjoy what you are doing, it is time to make a change and get into something new. An old quote says, “If you love what you do, you will never work a day in your life.”

DTC Dilemma

The code displayed was 00349, with the definition of an electrical fault for solenoid 10. The first thing I thought was, “How can you have a code for solenoid 10 when there are only nine solenoids in the unit, and which of those solenoids would number 10 be?”