4 Runner 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1989)
Overdrive Switch: All Technical Service Bulletins
A/T - Intermittent Loss of Overdrive
REF.:
TRANSMISSION & CLUTCH
NO.:
TM92-002 (REVISED)
DATE:
APRIL 10, 1992
MODEL:
VN
INTERMITTENT ENGAGEMENT OF OVERDRIVE (REVISED)
This TSB supersedes TM9202, dated 3/20/92.
CONDITION:
Intermittent loss of overdrive when the engine is at a normal operating temperature and at speeds above 45 mph.
CAUSE:
High resistance in the E-17 splice (THW circuit).
CORRECTION:
Clean the E-17 splice and then solder. The E-17 splice is located behind the power steering reservoir (see illustration).
NOTE:
Refer to production countermeasures.