MERCEDES-BENZ SPRINTER 2005 Service Repair Manual

HYDRAULIC FLOW IN DRIVE - FOURTH TO THIRD GEAR TRANSITION
VAAUTOMATIC TRANSMISSION - NAG1 21 - 65
AUTOMATIC TRANSMISSION - NAG1 (Continued)

HYDRAULIC FLOW IN DRIVE - THIRD TO SECOND GEAR TRANSITION
21 - 66 AUTOMATIC TRANSMISSION - NAG1VA
AUTOMATIC TRANSMISSION - NAG1 (Continued)

HYDRAULIC FLOW IN DRIVE - SECOND TO FIRST GEAR TRANSITION
VAAUTOMATIC TRANSMISSION - NAG1 21 - 67
AUTOMATIC TRANSMISSION - NAG1 (Continued)

SPECIFICATIONS - NAG1 AUTOMATIC
TRANSMISSION
GEAR RATIOS
1ST 3.59:1
2ND 2.19:1
3RD 1.41:1
4TH 1.00:1
5TH 0.83:1
REVERSE 3.16:1
SPECIFICATIONS
COMPONENT METRIC
(mm)INCH (in.)
Geartrain End-play 0.3-0.5 0.012-
0.020
Geartrain End-play Shim 0.2, 0.3,
0.4, and
0.50.008,
0.012,
0.016,
0.020
Rear Planetary Gear Set
End-play0.15-0.6 0.006-
0.024
Rear Planetary Gear Set
Snap-rings3.0, 3.4,
and 3.70.118,
0.134,
0.146
B1 Clutch
Clearance2 Disc 2.3-2.7 0.091-
0.106
3 Disc 2.7-3.1 0.106-
0.122
4 Disc 3.0-3.4 0.118-0.134
B1 Clutch Snap-rings 2.6, 2.9,
3.2, 3.5,
3.8, and
4.10.102,
0.114,
0.126,
0.138,
0.150,
0.162
B2 Clutch
Clearance4 Disc 1.9-2.3 0.075-
0.091
5 Disc 2.0-2.4 0.079-
0.095
B2 Clutch Snap-rings 2.9, 3.2,
3.5, 3.8,
and 4.10.114,
0.126,
0.138,
0.150,
0.162
B3 Clutch Clearance 1.0-1.4 0.039-
0.055
COMPONENT METRIC
(mm)INCH (in.)
B3 Clutch Snap-rings 3.2, 3.5,
3.8, 4.1,
4.4, and
4.70.126,
0.138,
0.150,
0.162,
0.173,
0.185
K1 Clutch
Clearance3 Disc 2.7-3.1 0.106-
0.122
4 Disc 3.0-3.4 0.118-0.134
5 Disc 3.3-3.7 0.13-0.146
6 Disc 3.6-4.0 0.142-
0.158
K1 Clutch Snap-rings 2.6, 2.9,
3.2, 3.5,
3.8, and
4.10.102,
0.114,
0.126,
0.138,
0.150,
0.162
K2 Clutch
Clearance3 Disc 2.3-2.7 0.091-
0.106
4 Disc 2.4-2.8 0.095-0.110
5 Disc 2.5-2.9 0.099-0.114
6 Disc 2.7-3.1 0.106-
0.122
K2 Clutch Snap-rings 2.3, 2.6,
2.9, 3.2,
3.5, and
3.80.091,
0.102,
0.114,
0.126,
0.138,
0.150
K3 Clutch
Clearance3 Disc 2.3-2.7 0.091-
0.106
4 Disc 2.4-2.8 0.095-0.110
5 Disc 2.5-2.9 0.099-0.114
K3 Clutch Snap-rings 2.0, 2.3,
2.6, 2.9,
3.2, and
3.50.079,
0.091,
0.102,
0.114,
0.126,
0.138
21 - 68 AUTOMATIC TRANSMISSION - NAG1VA
AUTOMATIC TRANSMISSION - NAG1 (Continued)

TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Bolt, B2 Clutch Carrier 16 - 141
Bolt, B1 Carrier to
Converter Housing10 - 88.5
Nut, Propeller Flange 120 88.5 -
Bolt, Electrohydraulic Unit 8 - 71
Bolt, Transmission
Housing to Converter
Housing20 - 177
Bolts, Oil Pan 8 - 71
Screws, Valve Body/
Housing Side Cover4-35
Bolt, Shift Plate 8 - 71
Bolt, Solenoid Leaf Spring 8 - 71
Plug, Oil Pan Drain 20 - 177
Nut, Shifter Mechanism to
Floor Pan7-65
SPECIAL TOOLS - NAG1 AUTOMATIC
TRANSMISSION
SPECIAL TOOL CROSS REFERENCE CHART
MB
TOOL #MILLER
TOOL #DESCRIPTION
N/A C-3339 DIAL INDICATOR SET
N/A C-4171 DRIVE HANDLE
N/A 6311 GAUGE BAR
N/A 8266 END-PLAY SET
N/A 8266-18 END-PLAY ADAPTER
N/A 8863A DIPSTICK
140 586
13 43 008900 MULTI-USE SPRING
COMPRESSOR
208 589
00 21
00N/A8901 PRESSING TOOL
N/A 8902A SEAL INSTALLER
N/A 9078 STAKING TOOL
N/A 9082 BEARING REMOVER
N/A 9287 BEARING INSTALLER
VAAUTOMATIC TRANSMISSION - NAG1 21 - 69
AUTOMATIC TRANSMISSION - NAG1 (Continued)

Dial Indicator - C-3339
Handle, Universal - C-4171
Bar, Gauge - 6311
End Play Set - 8266
Adapter, Geartrain End-play - 8266-18
Dipstick - 8863A
Compressor, Multi-use Spring - 8900
21 - 70 AUTOMATIC TRANSMISSION - NAG1VA
AUTOMATIC TRANSMISSION - NAG1 (Continued)

Tool, Pressing - 8901
Installer, Seal - 8902A
Tool, Staking - 9078
Remover, Bearing - 9082
Installer, Bearing - 9287
VAAUTOMATIC TRANSMISSION - NAG1 21 - 71
AUTOMATIC TRANSMISSION - NAG1 (Continued)

DRIVING CLUTCHES
DESCRIPTION
Three multi-plate driving clutches (Fig. 73), the
front, middle and rear multi-plate clutches K1, K2
and K3, are located in the planetary gear sets in the
transmission housing.
A multi-plate driving clutch consists of a number of
internally toothed discs (4) on an internally toothed
disc carrier and externally toothed discs (3) on an
externally toothed disc carrier.
OPERATION
The driving clutches (Fig. 74) produce a non-posi-
tive locking connection between two elements of a
planetary gear set or between one element from each
of two planetary gear sets in order to transmit the
drive torque.
If the piston (20) on multi-plate clutch K1 (1) is
subjected to oil pressure, it presses the internal and
external discs of the disc set together. The sun gear
(17) is locked with the planetary carrier (15) via the
externally toothed disc carrier (19) and the internally
toothed disc carrier (18). The front planetary gear set
is thus locked and turns as a closed unit.
Fig. 73 Driving Clutches
1 - K1 CLUTCH 12 - CENTER PLANETARY GEARSET SUN GEAR
2 - K2 CLUTCH 13 - K2 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
3 - EXTERNALLY TOOTHED DISC 14 - K2 CLUTCH PISTON
4 - INTERNALLY TOOTHED DISC 15 - FRONT PLANETARY GEARSET PLANETARY CARRIER
5 - K3 CLUTCH 16 - FRONT PLANETARY GEARSET ANNULUS GEAR
6 - K3 CLUTCH EXTERNALLY TOOTHED DISC CARRIER 17 - FRONT PLANETARY GEARSET SUN GEAR
7 - K3 CLUTCH PISTON 18 - K1 CLUTCH INTERNALLY TOOTHED DISC CARRIER
8 - K3 CLUTCH INTERNALLY TOOTHED DISC CARRIER 19 - K1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
9 - REAR PLANETARY GEARSET SUN GEAR 20 - K1 CLUTCH PISTON
10 - CENTER PLANETARY GEARSET PLANETARY CARRIER 21 - DRIVE SHAFT
11 - CENTER PLANETARY GEARSET ANNULUS GEAR
21 - 72 AUTOMATIC TRANSMISSION - NAG1VA

If the multi-plate clutch K2 (2) is actuated via the
piston (14), the piston compresses the disc set. The
annulus gear (16) of the front planetary gear set is
locked with the annulus gear (11) of the center plan-
etary gear set via the externally toothed disc carrier
(13) and the center planetary carrier (10) on which
the internally toothed discs are seated. Annulus gear
(16) and annulus gear (11) turn at the same speed as
the input shaft (21)If the multi-plate clutch K3 (5) is actuated via the
piston (7), the piston compresses the disc set. The
sun gear (12) of the center planetary gear set is
locked with the sun gear (9) of the rear planetary
gear set via the externally toothed disc carrier (6)
and the internally toothed disc carrier (8). Sun gear
(12) and sun gear (9) turn at the same speed.
Fig. 74 Driving Clutches
1 - K1 CLUTCH 12 - CENTER PLANETARY GEARSET SUN GEAR
2 - K2 CLUTCH 13 - K2 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
3 - EXTERNALLY TOOTHED DISC 14 - K2 CLUTCH PISTON
4 - INTERNALLY TOOTHED DISC 15 - FRONT PLANETARY GEARSET PLANETARY CARRIER
5 - K3 CLUTCH 16 - FRONT PLANETARY GEARSET ANNULUS GEAR
6 - K3 CLUTCH EXTERNALLY TOOTHED DISC CARRIER 17 - FRONT PLANETARY GEARSET SUN GEAR
7 - K3 CLUTCH PISTON 18 - K1 CLUTCH INTERNALLY TOOTHED DISC CARRIER
8 - K3 CLUTCH INTERNALLY TOOTHED DISC CARRIER 19 - K1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
9 - REAR PLANETARY GEARSET SUN GEAR 20 - K1 CLUTCH PISTON
10 - CENTER PLANETARY GEARSET PLANETARY CARRIER 21 - DRIVE SHAFT
11 - CENTER PLANETARY GEARSET ANNULUS GEAR
VAAUTOMATIC TRANSMISSION - NAG1 21 - 73
DRIVING CLUTCHES (Continued)

DRIVING CLUTCH K1
DISASSEMBLY
(1) Remove snap-ring (11) (Fig. 75) from outer
multiple-disc carrier (6).
(2) Take multiple-disc pack (12) out of outer mul-
tiple-disc carrier (6).(3) Place Multi-use Spring Compressor 8900 on the
spring plate (8) and compress the spring until the
snap-ring (10) is exposed.
(4) Remove snap-ring (10) (Fig. 75).
(5) Take out disc spring (7) and remove piston (6)
by carefully blowing compressed air into the bore (A).
(6) Remove snap-ring (3) and take out front free-
wheeling clutch F1 (2).
Fig. 75 Driving Clutch K1 Components
1 - K1 OUTER DISC CARRIER 7 - DISC SPRING
2 - FREEWHEELING CLUTCH F1 8 - SPRING PLATE
3 - SNAP-RING 9 - SPRING PLATE SEALING RING
4 - OUTER DISC CARRIER SEALING RING 10 - SNAP-RING
5 - PISTON SEALING RING 11 - SNAP-RING
6 - PISTON 12 - MULTIPLE DISC PACK
21 - 74 AUTOMATIC TRANSMISSION - NAG1VA