I've got an '06 Titan Crew Cab LE 4x4. I'm having a strange issue with the traction control. After I've been driving for 15 minutes or so and go to accelerate, the "Slip" light starts flashing and the truck will not accelerate. I'll coast along for a few seconds and it usually corrects itself. On one occasion, I had to coast to a stop on the shoulder before the problem went away. With the traction control turned off, this problem doesn't happen, but it has to be turned off before the problem starts or it doesn't help. Any ideas on where to start looking?