Hard Shift Remains after Reset of Shift Adapts - Transmission Digest

Hard Shift Remains after Reset of Shift Adapts

We recently received a 2002 Volkswagen Jetta, with a 09A five-speed automatic, with a complaint that it would not move. I determined that the fluid was burnt and black, indicating an internal failure. The check engine light was on and it had codes 00652 – gear monitoring not a plausible signal intermittent; 01045 – Tiptronic switch (F189) not a plausible signal intermittent; and 18032 – MIL request signal active (check TCM for errors) P1624. I drove the vehicle, and the transmission would slip and whine for about a block and then the vehicle would quit moving.
Hard Shift Remains after Reset of Shift Adapts

R&R Tech

Author: Troy Hopp
Subject Matter: Automatic transmission
Unit: 09A
Vehicle Application: 2002 Volkswagen Jetta
Issue: Hard 2-3 upshift

R&R Tech

  • Author: Troy Hopp
  • Subject Matter: Automatic transmission
  • Unit: 09A
  • Vehicle Application: 2002 Volkswagen Jetta
  • Issue: Hard 2-3 upshift

We recently received a 2002 Volkswagen Jetta, with a 09A five-speed automatic, with a complaint that it would not move. I determined that the fluid was burnt and black, indicating an internal failure. The check engine light was on and it had codes 00652 – gear monitoring not a plausible signal intermittent; 01045 – Tiptronic switch (F189) not a plausible signal intermittent; and 18032 – MIL request signal active (check TCM for errors) P1624. I drove the vehicle, and the transmission would slip and whine for about a block and then the vehicle would quit moving.

Obviously, we needed to replace the transmission; this in turn required replacement of the transmission control module per Volkswagen. VW had determined that 10% of the TCMs in certain vehicles with this particular transmission required replacement of the TCM as well, and ours fell into this category. I also determined that the Tiptronic switch in the center console had been shorted out, per code 01045.

After replacement of the transmission, TCM and Tiptronic switch the vehicle had a very hard 2-3 upshift. I assumed that the shift adapts needed to be reset and relearned. After I reset the shift adapts and drove it up and down through the gears (stop and go) for the suggested 50 miles, the hard 2-3 upshift did not get any better. The Volkswagen never set any codes but acted as though the 2-3 upshift was binding, possibly caused by a valve sticking in the valve body.

I contacted Chris, our lead diagnostician (who remained involved and was a large part of diagnosing the problem), and asked him his opinion; he informed me that the quality-control division at Certified Transmission was doing testing on these valve bodies and suggested that I try a new one. After replacing the valve body, I reset the shift adapts again, and as soon as I drove the car it immediately had a hard 2-3 upshift that again never smoothed out while I was driving it.

I decided to reset the shift adapts again and noticed on the scan tool that on the Basic Settings screen the group number was 001 this time. The first two times I reset the adapts, the group number was 000. This ruled out the valve body as the source of the problem. I reset the shift adapts again using the group 001 setting and found that the 2-3 shift felt normal; however, the longer I drove it the harder the 2-3 shift became again.

The start screen of the Ross-Tech VAG-COM scan tool
At this point when you click on “Go!” you push down the accelerator pedal fully for three seconds, click on “Done, Go Back” and then release the accelerator pedal. Nothing changes on the screen that would inform you that the procedure is complete.
On this screen you just click on “Read” and what you see in the four white boxes appears: “Note: SAVE Ch. 00 Resets All Factory Defaults.” Then click “Save,” then “Done, Go Back.”

This meant that the scan tool had a glitch the first two times I reset the shift adapts; it also meant that we might have a bad TCM. To verify that the TCM was the culprit I decided to put the original TCM back into the Jetta, and then the transmission shifted fine. I didn’t want to leave the original TCM in the vehicle because of the updates, so I ordered another TCM and installed it. After I reset the shift adapts properly without any scan-tool glitches, again the Jetta shifted fine but gradually acquired a hard 2-3 upshift. Now I had two new TCMs from Volkswagen that were creating hard 2-3 upshifts. I had no choice but to reinstall the original TCM, and again the transmission shifted fine.

We took the TCM off the customer’s bill and left the original TCM in the vehicle, since there did not seem to be a problem with it, and will wait for further updates from Volkswagen on the TCMs. The customer has picked up the vehicle and was pleased with the repairs.

For those of you wondering about the part numbers, the new TCM part number is 09A 927 750 BD and the original TCM part number is 09A 927 750 T. Please keep this in mind if you happen to run across this situation, and I hope you can save yourself some time and trouble.

Troy Hopp has been with Certified Transmission since early 2010. He has been in the industry for more than 25 years and is an ASE Master Technician. He is a diagnostician and R&R technician at one of Certified’s retail locations.

You May Also Like

Looking deeper: Telling apart electrical issues and parts issues

We see such a variety of transmission problems these days, and all the electronics involved today certainly have added a whole new crop of potential issues. Even though a significant part of our diagnostic process is geared towards electrical issues, there are still times when the problem is simple and not related to electronics at

RR-Tech-Nov-FIG-1

We see such a variety of transmission problems these days, and all the electronics involved today certainly have added a whole new crop of potential issues. Even though a significant part of our diagnostic process is geared towards electrical issues, there are still times when the problem is simple and not related to electronics at all.

Sonnax introduces Sure Cure Kit for GM 6L80, 6L90

Sonnax has introduced a Sure Cure kit for rebuilders of GM 6L80/6L90 transmissions. The company says this kit can restore shift quality and repair common TCC trouble areas, offering products to help rebuilders repair worn areas and protect the transmission against future damage. The kit is part no. SC-6L80-6L90. Related Articles – PRT adds 28

The importance of the follow-up road test after transmission replacement

A 2002 Lexus RX300 equipped with a 3.0-liter V6 engine and U140F transmission was brought into our facility with a few concerns. The customer said that “it has a leak, a grinding noise when taking off from a stop, and it just doesn’t seem to shift right.” Related Articles – GM 9T series: Critical wear

RR Tech Feature Oct
Dealing with the increasingly common pin-fit problem

I want to talk a little bit about a common diagnostic misstep or overlooked problem that is prevalent in the automotive repair industry and seems to be on the rise. Pin-fit or tension can deal us a fit sometimes (pun intended), especially if we do not have the proper tools to determine if this mode

RR-Tech-September-FIG-1-1400
Watch: Replacing a transmission and components

Dave Hritsko and the team have already removed a full transmission in a previous video. This time, see an in-depth explanation of the parts, components, and steps in how they make the upgrade with a remanufactured transmission along with new aftermarket components with the help of students from Ohio Technical College. Related Articles – The

Removing-a-Transmission-with-Dave-from-Transtar-1400
Other Posts
Alto releases friction and steel module for ZF 6HP transmissions

Alto has introduced a new friction and steel module for ZF 6HP series transmissions. The module works with ZF 6HP19/X/A (model years 2004 and on) and ZF 6HP21/X (model years 2007 and on) for ZF, Audi, BMW and Volkswagen vehicles. Related Articles – Alto introduces Nissan high-performance friction, steel module – Torque converter supplier listing

Watch: How to remove a transmission

Watch Dave Hritsko from Transtar and team members from Ohio Technical College as they remove an old transmission and replace it with a newly remanufactured transmission. Related Articles – Navigating the automotive aftermarket’s digital evolution – Video: What the future holds for the aftermarket at this year’s AAPEX – Cal Ganda’s Continental journey: From manufacturing

Back to square one: When a transmission replacement doesn’t fix the problem

The subject of this article is a 2002 Ford Ranger with a 3.0L V6 engine and 5R44E transmission. There were 191,622 miles on the vehicle when it arrived at our shop. The owner said that the transmission was not shifting correctly and the OD lamp was flashing. Related Articles – The Subaru mystery burn –

RRfeature-1400
The technician’s duty to the customer

I want to talk about some of the recent trends of particular cars and trucks that we see showing up at repair shops for work to be done. It seems to be a perfect storm of high used car prices, lack of new car inventory, and a bit of economic uncertainty that brings us to

rr-feature-1400