Gearbox Volkswagen AL420

The VW AL420 6-speed automatic transmission was produced by the concern from 2002 to 2011 and was installed on the Audi A6, A8, Q7, as well as the Volkswagen Phaeton and was essentially a clone of the ZF 6HP19. There were two versions of the automatic transmission: AL420-6A or 0AT and AL420-6Q or 09L with big differences.

AL-6 family: AL420, AL600, AL651, AL750, AL950.


Production years 2002 – 2011
Type automatic transmission
Number of gears 6
Type of drive front / all wheel (0AT)
all wheel (09L)
Engine volume, l up to 3.6 (0AT)
up to 4.2 (09L)
Torque output, Nm up to 360 (0AT)
up to 500 (09L)
Recommended oil G 055 162 A2 (0AT)
G 055 005 A2 (09L)
Oil capacity, liter 9.2 (0AT)
10.2 (09L)
Replacing the oil every 60,000 km
Replacing the filter every 60,000 km
Gearbox lifespan, km ~300 000
Weight, kg 76 (0AT)
110 (09L)

Gear ratios Volkswagen AL420

Using the example of a Audi Q7 2007 with a 3.6 FSI engine:

Main 4.556
1st 4.171
2nd 2.340
3rd 1.521
4th 1.143
5th 0.867
6th 0.691
Reverse 3.403

The transmission was installed on:

  • Audi A4 B6 (8E) in 2003 – 2004; A4 B7 (8E) in 2004 – 2009;
  • Audi A6 C6 (4F) in 2004 – 2011;
  • Audi A8 D3 (4E) in 2002 – 2010;
  • Audi Q7 1 (4L) in 2005 – 2010;
  • Volkswagen Phaeton 1 (3D) in 2005 – 2010.

Disadvantages of the VW AL420 gearbox

  • This is a very reliable gearbox if you change the oil often and keep it cool.
  • The mechatronics unit does not tolerate overheating and its failure after 150,000 km is not uncommon.
  • Overly active owners quickly wear out the torque converter locking clutches.
  • Then wear products clog the solenoids and shocks appear when switching.
  • Other problems are associated with regular leaks and the modest life of the bushings.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top