RING-SEAL 3534939 - Caterpillar

Table 2
40-Pin Connector J2    
No. (1)    Function    Type    
1     Speed 3 Solenoid (2)     Solenoid Output (ON/OFF)    
2     Speed 1 Solenoid     Solenoid Output (ON/OFF)    
3     Solenoid Return     Output Return    
4     Left Pedal Position Sensor     Frequency Input    
6     Primary Steering Pressure Switch (N.C.)     Switch Input (open/ground)    
7     Speed 4 Solenoid (2)     Solenoid Output (ON/OFF)    
8     Speed 2 Solenoid     Solenoid Output (ON/OFF)    
10     Primary Steering Pressure Switch (N.O.)     Switch Input (open/ground)    
12     Sensor Power Supply (8 V)     Sensor Supply (+8 V)    
13     Lockup Clutch Solenoid     Solenoid Output (ON/OFF)    
14     Transmission Speed Sensor     Frequency Input    
18     Transmission Oil Temperature     Pulse Width Modulated    
20     Transmission Speed Sensor Return     Frequency Input    
23     Transmission Input Speed Sensor -     Frequency Input    
25     Transmission Output Speed +     Frequency Input    
29     Transmission Input Speed Sensor +     Frequency Input    
31     Transmission Output Speed -     Frequency Input    
37     Backup Alarm     Solenoid Output (ON/OFF)    
38     Engine Speed     Frequency Input    
( 1 ) The connector contacts that are not listed are not used.
( 2 ) Only on three and four speed machines.