9
Installation Requirements
Proper Lubrication Levels as Related to Transmission Installation Angles
If the transmission operating angle is more than 12 degrees, improper lubrication can occur. The operating angle is the transmis-
sion mounting angle in the chassis plus the percent of upgrade (expressed in degrees).
For example: If you have a 4 degree transmission mounting angle, then 8 degrees (or 14 percent of grade) is equal to the limit of
12 degrees. If you have a 0 degree mounting angle, the transmission can be operated on a 12 degree (21 percent) grade.
Note:
The chart shows the effect a lubricant level 1/2” below normal can have on safe operating angles. Operating the vehicle
1/2” low on lubricant reduces the safe degree of grade by approximately 3 degrees (5.5 percent).
Note:
For transmissions with cooler’s installed, make sure lubricant is level with fill hole opening, run the truck, stop and check
lubricant level. Lubricant must be level with fill hole.
12
o
11
o
20'
10
o
13'
9
o
16'
8
o
6
o
51'
5
o
48'
4
o
35'
3
o
26'
2
o
18'
1
o
8'
0
o
0
o
1
o
2
o
3
o
4
o
5
o
6
o
7
o
22
20
18
16
14
12
10
8
6
4
2
0
Transmission Mounting Angle
Dotted line showing "2 Quarts Low" is for reference only.
Not recommended.
Proper Lubrication Levels are Essential!
Percent Grade Converted to Degrees
Limitations for Proper Lubrications
Percent of Grade
TRANSMIS
SION OIL L
EVEL 1/2" BELOW
FILLER HOL
E
2 QUARTS L
OW
TRANSMIS
SION OIL L
EVEL TO BOTTOM
OF FILLER HOLE
