I have a 1948 8N. Last spring I bought a new starter with drive from this site. For the past few days, when I first engage the starter, it turns over very slowly at first (while making a lot of noise)and after cranking for about 5 seconds it speeds up to normal cranking speed and then starts. A few times it has stopped cranking like it would with a dead battery. I should have checked the battery connection but I didn't as it looked OK. The battery was new last year, and I checked the connections to the solenoid. Would you think this is a problem with the starter drive, the solenoid, or the battery connections?