Starter Problems, Speedometer and temp gauge problems, need new rear coilsprings

What is your question?

Replaced the starter 5X in the last year with new & rebuilt-still clicks and grinds. Speedometer goes to & stays at 40mph when moving, Temp gauge moves to cold whenever I step on the gas. Any ideas? Looking for new rear coil springs-discontinued by Nissan-does anyone else make them? Thanks