i have a '91 grand caravan with the deluxe gauge cluster. the speedometer sticks at random speeds and won't go up or down. sometimes when i start it and go it doesn't move from 0 for some time then all the sudden starts working. i replaced the cluster and it did the same thing so that's not it. next i replaced the vehicle speed sensor and that didn't work either. there is no speedo cable on this model so obviously that's not it. is there another sensor that could be causing the issue and if so where the **** is it? i have the factory repair manual and can't figure it out. thanks!