[tdenkler]

93 Laredo. 193,000. Well maintained. Trans never slips,shifts great, but been jumping out of overdrive for 4 years. No pattern. Also, will drop down a gear occasionally in town, but not often.
replaced ECM(engine) and TCM(transmission) puters.
1 manual alludes to a "lockup" solenoid. Have found no other reference to this.
Any ideas?