Freightliner Business Class. Manual - part 19

Remove the transmission oil pan and drain the
fluid. Remove the fluid filter.

Loosen the locknut and back it off five to six
turns. Make sure the adjusting screw turns freely
on the band adjusting lever.

Set the adjusting screw. To turn the adjusting
screw, use a 5/16-inch 8-point socket on a 0 to
100 lbf·in (1100 N·cm) torque wrench.

4.1

Tighten the adjusting screw 72 lbf·in (800
N·cm).

4.2

Back off the adjusting screw two turns.

Holding the adjusting screw in position, tighten
the locknut 25 lbf·ft (34 N·m).

Install the filter and oil pan. Replace the oil pan
gasket. Tighten the oil pan bolts 13 lbf·ft (17
N·m).

Lower the vehicle.

Check and adjust the fluid level using the proce-
dures under "Checking the Fluid Level."

26-08 Aisin Transmission Fluid

and Filter Changing and
Magnetic Plug Cleaning

Park the vehicle on a level surface and apply the
parking brakes. Chock the rear tires.

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f260304

Locknut

Rear Band Adjusting Screw

Band Adjusting Lever

Valve Body

Fig. 15, Rear Band Adjusting Screw, Chrysler

Transmission

26/16

Run the engine until the transmission fluid
reaches the operating temperature of 160 to
200°F (71 to 93°C). Shift the transmission to
neutral (N) and shut down the engine.

CAUTION

To prevent dirt from entering the transmission,
use only clean containers and fillers for the trans-
mission fluid. Do not use fillers or containers that
have been used for water or antifreeze. Dirt, water,
or antifreeze could damage the transmission.

Clean the area around the drain plug. While the
transmission fluid is warm, remove the magnetic
drain plug and drain the fluid. See

Fig. 16

NOTE: The transmission should drain about 7.9
quarts (7.5 L).

IMPORTANT: Examine the used transmission
fluid for dirt, coolant or water, and metal par-
ticles. If any of these contaminants are present,
a problem may exist within the transmission
system.

Replace the filter. It is located on the passenger-
side of the vehicle.

4.1

Place a drain pan under the transmission
fluid filter.

CAUTION

To prevent skin burns from hot transmission fluid,
wear protective gloves when removing the filter.

4.2

Place a strap or chain wrench around the
filter canister, and rotate in a counter-
clockwise motion to separate the filter
from the mounting. Carefully spin the filter
off the mount and remove it from the ve-
hicle.

4.3

Apply a light coat of transmission fluid to
the O-ring gasket on the new filter. Fill the
filter with the specified transmission fluid,
and spin the filter back onto the mount.

NOTE: The filter fills slowly, so be patient to
ensure the proper fluid level has been
reached.

4.4

Once the filter has made contact with the
mount, use a strap or chain wrench to
rotate the filter canister an additional 180
to 270 degrees to firmly tighten the filter.
Wipe the filter clean of any fluid after it is
tightened.

Clean the plug before installing it.

Clean drain plug threads in the tank.

Install the plug. Tighten 32 lbf·ft (43 N·m).

Remove the transmission fluid dipstick.

Prepare 11 quarts (10 L) of Dexron

III automatic

transmission fluid (ATF).

10. Through the dipstick tube, fill the transmission

with Dexron

III, about 7.4 quarts (7 L).

11. Inspect the low temperature ATF level.

11.1

Make sure the vehicle is in neutral and
start the engine.

11.2

Let the engine idle and successively shift
positions to spread ATF throughout the
transmission.

11.3

Set the shift selector to neutral (N).

11.4

Continue engine idle and remove the dip-
stick. Wipe it clean, re-insert it, remove it
and measure the ATF level.

11.5

If the ATF temperature is between 68 and
86° F (20 and 30° C), the fluid should
measure in the COLD range. See

Fig. 17

11.6

Refill the ATF until it reaches the appro-
priate range.

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f261021

A. Drain Plug

Fig. 16, Aisin Transmission Drain Plug

Transmission

26/17

12. Inspect the high temperature ATF level.

12.1

Make sure the vehicle is in neutral and
start the engine and remove the chocks.
Drive the vehicle for 30 minutes to raise
the ATF temperature to normal working oil
temperature.

Park the vehicle on a level service and
chock the tires.

12.2

With the engine idling, engage the brake
pedal and successively shift gear posi-
tions to spread ATF throughout the trans-
mission.

12.3

Set the shift selector to neutral (N).

12.4

Continue engine idle and remove the dip-
stick. Wipe it clean, re-insert it, remove it
and measure the ATF level.

12.5

If the ATF temperature is between 158 to
176°F (70 to 80°C), the fluid should mea-
sure in the HOT range. See

Fig. 17

•

If the ATF level is below the HOT
range, add ATF until the level is
within the HOT range.

•

If the ATF level is above the HOT
range, remove the drain plug
(

Fig. 16

) and drain ATF until the

level is lower than the required
range. Then, install the drain plug

and refill with ATF until the level is
within the HOT range.

13. Remove the chocks from the tires.

26-09 Mercedes-Benz (MBT)

Transmission Leak
Checking

Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.

Check for signs of leakage at the breather. See

Fig. 18

2.1

If leakage is found, check the breather for
a missing cap. Replace the cap if neces-
sary.

2.2

Check the fluid level at the fill plug. If the
level is too high, correct the fluid level.

Check for signs of leakage at the cap seal on the
shift lever. If the cap seal is damaged, replace it.

12/06/1999

f011723

A. Hot Range
B. Cold Range
1.

Dipstick

Fig. 17, ATF Dipstick, Aisin Transmission

05/22/2001

f261101

NOTE: The transmission is shown from the left-hand
side.

Shift Lever Cap Seal

Breather

Output Shaft Radial Seal

Countershaft Rear Cover Plate

Transmission Fluid Fill Plug

Transmission Fluid Drain Plug

Gear Case Seals

Clutch Slave Cylinder

Input Shaft Radial Seal

Fig. 18, MBT Transmission Leak Check

Transmission

26/18

Check for signs of leakage at the radial seal on
the output shaft. If leakage is found, remove the
output yoke (end yoke) and replace the seal. For
procedures, see Section 26.00, Subject 130, of
the

Business Class

Trucks Service Manual

NOTE: There are two cover plates on the coun-
tershaft, one at the front and one at the rear.

Check for signs of leakage at the rear cover
plate on the countershaft (next to the output
yoke). If leakage is found, check the torque on
the cover-plate bolts and check the flat seal for
damage.

5.1

If the flat seal is damaged, replace it.

5.2

If the cover-plate bolts are too loose,
tighten them 18 lbf·ft (25 N·m). If the
cover-plate bolts are too tight, replace the
flat seal and tighten to 18 lbf·ft (25 N·m).

Check for signs of leakage at the transmission
fluid fill plug. If leakage is found, check the
torque on the plug and check the aluminum gas-
ket for damage.

6.1

If the gasket is damaged, replace it.

6.2

If the fill plug is too loose, tighten it 42
lbf·ft (57 N·m). If the plug is too tight,
loosen it and tighten to 42 lbf·ft (57 N·m).

Check for signs of leakage at the transmission
fluid drain plug. If leakage is found, check the
torque on the plug and check the aluminum gas-
ket for damage.

7.1

If the gasket is damaged, replace it.

7.2

If the drain plug is too loose, tighten it 42
lbf·ft (57 N·m). If the plug is too tight,
loosen it and tighten to 42 lbf·ft (57 N·m).

Check for fluid dripping at the gear case seals. If
substantial leakage is found at either location,
replace the transmission.

NOTE: Weeping or sweating seals are not
cause for transmission replacement.

WARNING

Clutch hydraulic fluid (DOT 3 brake fluid) is haz-
ardous. It may be a skin irritant and can cause
blindness if it gets in your eyes. Always wear
safety glasses when handling clutch hydraulic

fluid or bleeding hydraulic lines. If you get clutch
hydraulic fluid on your skin, wash it off as soon
as possible.

Check for signs of leakage at the clutch slave
cylinder.

CAUTION

Do not spill clutch hydraulic fluid (DOT 3 brake
fluid) on the cab paint. Clean it off immediately if
any is spilled. Clutch hydraulic fluid can damage
paint.

9.1

If leakage is found on the slave cylinder
body, check the fittings and hose for dam-
age.

9.2

If leakage is found on the piston seals,
replace the slave cylinder and bleed the
clutch hydraulic system. For detailed in-
structions on bleeding the clutch, see

Group 25

9.3

If the slave cylinder fittings and/or the
hose are damaged, replace them.

9.4

Check the torque on the slave cylinder
mounting capscrews. Tighten them 15
lbf·ft (20 N·m).

9.5

If any leakage of clutch hydraulic fluid is
found, check the fluid level in the reser-
voir, and add fluid if needed. For detailed
procedures, see

Group 25.

NOTE: There are two cover plates on the coun-
tershaft, one at the front and one at the rear.

10. Check for signs of leakage at the clutch bell

housing. If leakage is found, check the radial
seal on the input shaft, the front cover plate on
the countershaft (inside the clutch bell housing),
and the rear radial seal on the crankshaft.

10.1

If the radial seal on the input shaft is
leaking, replace the radial seal. For pro-
cedures, see Section 26.00, Subject 120,
of the

Business Class

Trucks Service

Manual

10.2

If the front cover plate on the countershaft
is leaking, replace the cover plate. Apply
liquid gasket (Loctite 518) to the new
cover plate when installing it.

Transmission

26/19

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