Mercedes 722.6, Daimler W5, Porsche W5, Jaguar 722.6
The 722.6 transmission went into production for use in 1996-model-year vehicles and is still being offered in 2009. The 722.6 is used in Mercedes, Porsche and Jaguar vehicles and in a variety of Chrysler products, where it is referred to as NAG1.
Crime-Scene Investigation, Part 2
This is the conclusion of a two-part article that began in the May issue. Part 1 covered the basics of the lawsuit, the progression from warranty issues to major lawsuit, and inspection of the transmission.
Cummins Diesel TCC Shudder: a New Twist
A 2001 Dodge Ram 2500 4×4, with a Cummins diesel engine and a 618 transmission, was brought to a transmission shop with a complaint of TCC shudder. Three to four months prior to coming to the shop, the customer noticed a change in the TCC-apply feel. He said that the TCC apply had suddenly become more aggressive or abrupt. The condition had worsened over the course of three to four months, until the start of the shudder issue.
Crime-Scene Investigation, Part 1
I thought you, as technicians involved in transmission repair, might like to follow a recent transmission-related lawsuit I was involved in, both to see how it really happens and to learn more about protecting yourselves and your business. The lawsuit you are about to read has been settled. All parties involved are subject to a confidentiality agreement. There are no names, dates or places, but I think the mysteries of the case will interest you.
What Is the Correct Name? Part II
In 1955 the automotive industry finally standardized the shift quadrant on all vehicles. From that time forward, all shifters would read from left to right (or front to back) and the order would be: Park, Reverse and Neutral, followed by the Drive ranges.
May 2009 Issue
Issue Summary:
A Honda vehicle equipped with a BAXA/B7XA-family transmission exhibits flared or slipping upshifts before or after overhaul.
A Mitsubishi or Hyundai vehicle with an F4A40/50-series transmission comes back after overhaul with the second-clutch plates burnt and code P0732 stored.
Before or after overhaul, the malfunction indicator lamp (MIL) is illuminated on a Honda vehicle equipped with a BAXA/B7XA-family transmission and code P1705 is stored.
Just When You Think You’ve Seen It All …
Once I found the termination of the ground wires, I could not believe where they were bolted – not to a clean engine ground but to the motor side of the starter motor! That’s right: When the starter motor was cranked, 12 volts was applied to the ECU ground wires. This explained perfectly why the spark disappeared when the starter was cranked but returned when I let off the key.
What We Do for a Buck
One of our accounts brought in a 2007 Ford F-450 with a 6.0 diesel engine and a 5R110W TorqShift transmission, complaining of a delayed engagement in reverse. The driver also complained that if he decided to accelerate hard just before coming to a stop, the transmission would neutralize and then engage harshly.
The 09D/TR-60SN Transmission
The 09D/TR-60SN transmission (Figure 1), the rear-wheel-drive version of the front-wheel-drive 09G/TF-60SN transmission (Figure 2), is being used in the VW Touareg and Porsche Cayenne in the United States. The clutch-application chart in Figure 3 reveals the same clutch elements as in the 09G. If you save past issues of Transmission Digest, dig up the November and December 2008 issues and you can do a little comparison of the 09G with this 09D.
What Recession?
Whenever we find ourselves in a recession we also find that not everyone is losing money on account of it. Some are actually making far more than they would in a normal economy. You are a good example of one who can profit from a long-term economic downturn.
A New Trick in the Bag
For years we have known that the 4L60 and 4L60-E second-gear servo came in three different sizes. Now there is a fourth OEM servo size that gives builders a new choice when looking for something with increased performance.
April 2009 Issue
Issue Summary:
A damaged bridge seal can result in pressure loss, causing a ZF 6HP26 in a 2002 BMW 745Li to be stuck in park.
After overhaul, a Honda vehicle with an MGHA-family transmission exhibits wrong-gear starts, and various solenoid DTCs may be stored.
Some 2002 Mazda MPVs can have harsh shifts with the MIL illuminated and/or the OD light flashing, and no DTCs stored.
Engine speed in a 2006 Honda Civic with a CVT sometimes stays around 4,000 rpm during deceleration as the vehicle is being driven straight ahead.
