Jeff Parlee, Author at Transmission Digest - Page 2 of 3
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Non-Tiptronic vs. Tiptronic-Style 01M

Most Volkswagens that use the 01M transmission in the United States are non-Tiptronic. However, there is a Tiptronic version of this transmission that is used in other parts of the world, and you never know when one might pull into your shop for service.

Adjusting Clutch-Control Valves on the Aisin FWD 6-Speeds

Have you ever installed a TF80, TF81 or TF60 after overhaul and it has had harsh shifts or engagements, or maybe there has been a flare/bump upshift or harsh coast-down clunks? Most times, clearing the shift adapts and driving the vehicle to relearn the shifts will correct these annoying problems. After a good, long test drive to relearn the shift adapts, sometimes a shifting or engagement problem remains. Assuming that there is not excessive wear in the valve body and the linear solenoids are good, the clutch-control valves on the valve body can be adjusted to correct these problems.

Clearing up Some Toyota Solenoid Confusion

Different terminology for the same part has been an ongoing problem in the transmission industry ever since I can remember. When I was learning to rebuild transmissions, Chrysler Torqueflite and Ford C-4 transmissions were always in the shop. These two transmissions had the same power flow, but all the internal components had different names.

Identifying the 5L40-E and 5L50-E Transmissions and Valve Bodies

The 5L40-E and 5L50-E transmissions and valve bodies look the same at a glance. On the Cadillac, Pontiac Solstice and Saturn Sky, you can look on the service-parts identification label to identify the transmission by the RPO (Regular Production Options) number.

Resetting Hyundai Shift Adapts, and Procedures for Relearning

Body of Evidence Like most late-model vehicles, Hyundai vehicles need the shift adapts cleared and then relearned to get a properly working transmission after overhaul or valve-body replacement. Some Hyundai vehicles can have the shift adapts cleared by disconnecting the battery, connecting the positive and negative battery cables and turning on the headlights for 10

Let’s Talk about Adaptive Shift Strategy

The 604 was the first American computer-controlled transmission with adaptive shift strategy. The relearn process was not much different from what it is for today’s transmissions. For those of you who were not in the transmission industry back then, there was no quick-learn procedure for the 604. The quick-learn feature was not available until the mid-’90s. You actually had to drive the car at different throttle openings to relearn the shift adapts, and it could take 30 minutes or more of driving time to get it right.

4T65-E Valve-Body and Channel-Plate Identification

Let’s start with the valve body. Unfortunately, there are no casting numbers on the 4T65-E valve body for quick identification. The four most-common 4T65-E valve bodies are the early GM, late GM, early Volvo and late Volvo. There are more than four variations, and they can be found during the crossover years of 2002 and 2003. There are four questions that you need to answer to properly identify the valve body.

Solenoid-Pack Information for the Chrysler 62TE

The 62TE solenoid pack is made up of six shift solenoids, one line-pressure solenoid, a temperature sensor and five pressure switches. The pressure switches are just like the ones in a 604 solenoid pack.

Case-Mounted Coolers

Case-mounted transmission-fluid coolers that are used by Volkswagen and other manufacturers are effective at warming and cooling the transmission fluid. The 01M family, 09A and some 09G transmissions use a case-mounted cooler.

Electrostatic Discharge: the Quiet Computer Killer

Electrostatic discharge (ESD) is defined as a sudden and momentary flow of electric current between two objects of different electrical potentials.

At one time or another, everyone has walked across a rug and reached out for a door and gotten a little shock. This was an electrostatic discharge. There are many ways to generate electricity in our bodies; just a few examples are removing a coat or sweater, walking across a room, sliding across a car seat, or handling plastics or plastic foam. Depending on the humidity of the day, you may feel a shock from the electrostatic discharge.

Volkswagen 09G or TF60: Clearing and Relearning Shift Adapts

Body of Evidence The 09G is an adaptive-learn transmission. The TCM can adapt the upshift and downshift pressures for each shift as well as initial engagement into drive and reverse. Whenever the transmission is rebuilt or the valve body is replaced the shift adapts should be cleared and the vehicle driven to relearn the new

Manual-Valve Confusion

While doing research on the Aisin AW six-speeds, I found that the Ford/Mazda (TF81-SC) manual valve and the Volvo (TF80-SC) manual valve are almost identical. Both look the same at a glance, but up close there are critical differences. I also noticed that these two valves are just about the same as an AW55-50 manual valve. All three have the same outside diameter of 0.471 inch. Even the “Z” links look the same until you lay them side by side (do not interchange the valves or the “Z” links).