Quote:
Originally Posted by flatheadmurre
To a limit you can use the same gear against different ratios gears...difference is how deep they engage.
So you will be moving the contact surface further in or out on the drive gear.
Any "modern" gearbox use the same technology so not uncommon.
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Thanks,
So I am only guessing from this that Ford designed the 4 speed transmission mount so the driven gear was at the maximum distance required by the various combinations of drive and driven gears for the speedometer and just allowed less than full engagement of the gears wherever else it was required. Doesn't seem like good engineering practice, but I guess whatever gets the job done is OK. Easier than keeping a number of different type of transmission mounts on hand despite the fact they did that with the "turtles". Might be a good exercise to sit down with the various gear tooth combinations and work out the centre to centre distances of the gears to see how much variance there is.
From an engineering point I prefer the GM adjustable eccentric mount for the driven gear.