Testing Vacuum Control

Vacuum Function Diagram (Shown On Model 124 And 126):

Complaints:
Transmission shifts hard.
Transmission slips during gear change.

Test conditions:
Engine at idle and operating temperature.
Test vacuum lines according to function diagram.
Modulating pressure correctly adjusted.

Special Tool:

Test items:
Vacuum control valve, vacuum transducer, electric switchover valve and temperature switch.

Testing (Part 1):

Testing (Part 2):