My speedometer has been bouncing around while driving, sometimes not working at all, then sometimes working fine while driving since I got my car 2 months ago. Recently I recieved a code 24 which indicates there is something wrong with the VSS, which is located on the tranny. The code isn't coming on again but my speedo is still acting crazy. Could anyone help me diagnose what the problem is and how to fix it? I'm guessing the wiring is loose.

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87 Camaro Sport Coupe
MSD Coil, Accel 8.8mm wires, Rapidfires
K&N Filters, No Air Baffles
Z28 Hood and Rims