I have a problem with the starter on my '67 with manual 3-speed
tranny. It has a 302 from a '79 Lincoln. The starter has worn down its teeth due to spinning against the flywheel ring gear while trying to start the engine. The teeth are not worn completely off but rather just a small amount I have experienced a very noisy sound when starting, but today the starter would spin but wouldn't turn the engine. The engagement must be off in some way to have caused this wear to occur.
The flywheel has 157 teeth and the starter has 9. The starter is the longer-nose model used for a 289 HiPo, which is also the part number for a '68 302 4Bbl automatic and 1967 289 2 Bbl automatic. The wear on the starter teeth indicates a proper full engagement. The shorter nose starter will not engage deep enough, as best I can determine. I have measured things and this application seems to require the longer nose. The starter for the manual
tranny will have a short nose, and I don't think it will work.
Could the 157 teeth on the flywheel and 9 teeth on the starter gear be mismatched in a way that would cause this problem?
Another possibility that I have not yet checked is that the 10-tooth starter may have a larger gear diameter than the 9. If so, then the 9 may be too small to properly mesh with the ring gear, and thereby cause skipping (and wear) as the starter tries to turn the flywheel.
I also noticed that this rebuilt starter has somewhat larger bolt holes than required for the bolts, leaving me to conclude that some extra play may be present if that diameter is unusual.
Advice is badly needed!