Oval speedometer binds in reverse

[deuce295]

My oval speedometer will sometimes bind up when going in reverse. Snapped my drive cable. It seems to work just fine going forward and seems to indicate speed good but when I go in reverse it will lockup sometimes. Curious if anyone who has been inside one of these would have any input. Wondering if there is an area where there could be a broken tooth on a gear perhaps. Just curious if anyone has any thoughts. Will be pulling it out as soon as i get a little time . Thanks.