Hello all!
I just swapped out my idiot light gauge cluster in my 87 for a cluster that has oil pressure, temp, and ammeter guages along with the speedo and the fuel gauge. Everything works well after changing the oil pressure and temp sensors. One weird thing going on is that the speedo needle jumps all over the place until I hit approximately 35-40mph, then it climbs abd falls pretty smoothly UNTIL the speed dips below 35, then it's all over the place again. What gives?