232
2
0
1
0
5
0
2
2707
1
500
7226
0
05
0617880
B
4
1
1
To utilize the 722.6 transmission behind the diesel,
and the 4, 6, 8 and 12 cylinder gas engines, different
gear ratios and torque capacities are needed. Various
ratios are accomplished in 2 ways:
1. Different size axle ratios in the rear
differential.
2. Different ratio planetary gear sets inside the
transmission.
Various amounts of friction and steel plates are used
to accommodate the required torque capacity through
different heights in the apply piston or snap ring
groove location.
Should an incorrect transmission or rear axle ratio be
installed into the vehicle, the computer system will
observe this as a slipping transmission and produce
gear ratio error codes.
Should incorrect clutch drums or pistons be used,
such as a 4 cylinder set up behind a 12 cylinder
engine, premature failure of the transmission will be
the result.
It is for these reasons that proper identification be
employed when rebuilding or exchanging this unit. To
order parts from Mercedes, you
must
provide the VIN
number.
Use Figure 1 to locate and identify the transmission
designation number that is etched into a raised boss
area on the left side of the transmission case. This
number is matched to the engine size which
determines the gear ratio and clutch capacity of the
transmission. There are currently four different
planetary gear ratios used in the 722.6 unit.
NAG1 identifies a family of transmissions and means
"N"ew "A"utomatic "G"earbox, generation 1.
Various marketing names are associated with the
NAG1 family of transmissions, depending on the
transmission variation being used in a specific
vehicle. Some examples of the marketing names are
W5A300 and W5A580. Refer to Figure 1.
Transmission and Engine designations can be
identified and cross referenced to the year, model and
in some cases the VIN number, for Mercedes vehicles
from 1996-2001, equipped with the 722.6
transmission.
For Mercedes model years 1996-2001, refer to Figure
2 and Figure 3.
For Mercedes model years 2002-2004, refer to Figure
4.
For Daimler/Chrysler models that are equipped with
the 722.6 transmission, refer to Figure 5.
Figure 1
Transmission
Designation
On Left Side of
Transmission
Case
2102707500
722605 0
0617880
TRANSMISSION IDENTIFICATION
722. 6 05
Automatic
Transmission
for passenger cars
Sales Designation
Version, e.g.
Matching to
the respective
engine
3
Copyright © 2009 ATSG
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
W5A 580 = Passenger Cars with 8 and 12 cylinder engines
W5A 400 = AAV (SUV) vehicles with 8 cylinder engines
W5A 330 = Passenger cars with 4, 5 and 6 cylinder engines
W5A 300 = AAV (SUV) vehicles with 6 cylinder engines
W5A 280 = MB Vans - Vito, Sprinter and Vario
W 5 A 580
Maximum Input Torque in NM
Automatic Transmission
Number of Forward Gears
Hydraulic Torque Converter
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