[DieselDemon]

I'll tell ya another common problem that was always misdiagnosed by dealership mechanics. I kept bringing my 95 Ram back because it was coming in and out of lock up. Hit a bump and the tc would come out of lockup, then lock back up again. Anyway, long story short, the plunger switch for the brake lights was improperly set. There was a small amount of loose travel in the brake pedal. When I hit a bump, the brake pedal would move just enough to allow the brake light switch to be activated. And of course, the tc would unlock.

It wasn't until the mechanic finally road tested the vehicle and discovered what was causing the problem. He discovered it when he set the cruise control. Again, we'd hit a bump, but this time the cruise control also disengaged.

I understand that your problem was not the same as mine, but I thought I'd pass along that info in case someone else was experiencing erratic tc lock/unlock.

Adios...