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Page 36
Transmission and Torque Converter
(ZF 4WG-310)
Downshift (Auto Selector Switch "I" - Auto Mode)
When the auto selector switch (Figure 33) is in the "I" position, the "29" terminal of transmission controller
is energized. This allows the transmission to automatically upshift and downshift gears depending on the
load and on the engine speed.
If either downshift switch (Figure 30) is activated, a pulse signal is sent to the "22" terminal of transmission
controller. This signal shifts the transmission to the next lowest gear.
AHS0230L
Figure 33
Reference
Number
Description
1 Transmission Controller
2 Transmission Selector Switch
3 Transmission Control Valve
4 Fuse Box
5 Auto Selector Switch
6 Transmission Cutoff Selector
Switch
7 Transmission Cutoff Pressure
Switch
8 Display
9 Downshift Switch
10 Safety Start Switch
11 Output Speed Sensor
12 Speed Pick-up
13 LIS Select Switch
14 LIS Solenoid
15 Speedometer
16 Parking Brake Switch
Reference
Number
Description