What would be the correct tooth count for a speedometer gear, t85 overdrive trans with 410 gear ratio. This is an older t85 because it uses the 16 spline yoke, that is so hard to find. I put this trans in my 54 ranch wagon and need a gear, don't know where to start. I have seen repro gears on Ebay. Will the trans accept different tooth counts or do you have to get it right the first time.

tom in iowa

54 Merc wagon

54 sunvalley