[MacsGTO]

Driving around with the cable off isn't the best way. The easiest way is to take the end off the trans and attach it to a drill and see if the speedo moves. Is it does then you know it's the gear in the trans. Easy change. Plastic piece that just slides out. If the speedo doesn't spin then disconnect the cable from it and spin it again. If it spins then its the gear or something with the speedo. If it doesn't , well then its the cable. Your fuel gauge is probably the float inside the tank. It works off of electrical resistance and when there is more room for it to bob around more plus it being old and worn I'm sure there's slop. As far as your temp goes you'll have to check that wire for shorts. If you don't find any then it's probably the sensor. It works off of resistance as well. The hotter it gets the more resistance and that's what the needle shows you translated into temperature. Unfamiliar with the tandem lock sorry.
Posted via Mobile Device