November 2010 Issue

In This Issue Audi/VW 09M/09G/TF60-SN: Harsh shifts into reverse, third and fifth gears VW 09A & 09G: 2-3 flare, harsh 3-4; double-bump 2-3 and/or downshift clunks Summary: Before or after overhaul, vehicles equipped with the 09M/09G/TF60-SN transmission may exhibit a complaint of harsh reverse, third and fifth gears when hot. After overhaul, vehicles equipped with the 09A may exhibit a 2-3 flare and a harsh application into fourth. On vehicles equipped with the 09G the complaint may be a double bump on the 2-3 and/or downshift clunks.

Audi/VW 09M/09G/TF60-SN
Harsh shifts into reverse, third and fifth gears

Before or after overhaul, vehicles equipped with the 09M/09G/TF60-SN transmission may exhibit a complaint of harsh reverse, third and fifth gears when hot.

The cause may be a worn bonded balance piston in the K3-clutch drum. See the cross-sectional view in Figure 1.

The balance-piston function is to hold “counter” or “back” pressure on the K3 apply piston. The balance piston is fed from the lube circuit, and its purpose is to provide a small amount of pressure to assist the release of the K3 clutch. It also acts as an accumulator during application of the K3 clutch (figures 2 and 3). The bonded piston has three notches where the retaining snap ring is situated, allowing a controlled leak of this pressure, and when the bonded rubber is worn this will allow a larger volume of pressure loss, which can cause the harsh applications.

Refer to Figure 4 and replace the bonded K3 balance piston.

Note: At the time of this printing, after-market replacement pistons should be available. Dealers sell parts for this transmission only as an assembly.

VW 09A & 09G
2-3 flare, harsh 3-4; double-bump 2-3 and/or downshift clunks

After overhaul, vehicles equipped with the 09A (JF506E) may exhibit a 2-3 flare and a harsh application into fourth. On vehicles equipped with the 09G (TF60-SN) the complaint may be a double bump on the 2-3 and/or downshift clunks.

The cause may be that the clutch adaptives were not reset.

Using a capable scan tool go into the engine side and reset all the adapts. The following six steps in figures 5 through 10 will show how to reset the adaptives through the laptop-based VAG-Com diagnostic system.

Figures 11 through 13 describe each of the data blocks available in this system.

It will be necessary to take a 15-shift-cycle road test after performing this reset to fine-tune the adapts.

Note: Early-model 09As require a capable scan tool to reset adapts. You cannot drive them out! ATSG highly recommends resetting adapts on all the above-mentioned vehicles.

November 2010 Issue
Volume 27, No. 11

Audi/VW 09M/09G/TF60-SN: Harsh shifts into reverse, third and fifth gears
VW 09A & 09G: 2-3 flare, harsh 3-4; double-bump 2-3 and/or downshift clunks

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Honda Accord BB7A six-speed: P2720 code set after collision

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