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Cletrac Tractor Discussion => HG, OC-3, OC-4 & General => Topic started by: Will_Faulkner on February 04, 2017, 06:34:02 PM

Title: Transmission Gears
Post by: Will_Faulkner on February 04, 2017, 06:34:02 PM
A quick question for you guys:

Why go through all of the work to install a secondary transmission when first gear could be replaced with a lower ratio gear set, moving the first gear to second possibly?  I am pretty new at modifying gear sets and addressing the problem of too high of a gear for first.  Thank you for your answers!
Title: Re: Transmission Gears
Post by: oliverchris on February 06, 2017, 09:59:44 PM
It does sound feasible, but there's so many dimensions to take into account, I imagine you'd be searching for a very long time or have to have them custom-made. 1st gear on the top shaft is also reverse, then it has to mesh nicely with the sliding 1st and reverse on the bottom shaft.
I guess a good engineer could draw one up within all the constraints. But I imagine the first set would cost a fortune in terms of CAD and set-up costs.
It might be possible to put a complete OC-4 transmission, which is has a more highly geared first gear, into an OC-3, similar to the early OC-4's with the 4 cylinder IXB engines (1957-8)?