by corrado » Mon Nov 19, 2018 10:52 pm
I've got a close ratio gearbox that when assembled correctly on a layshaft sits below the top of the layshaft. Hence I'm unable to shim it. I've got a selection of layshafts, Casa, FA Italia, MB, Sil, all with the same issue (a pacemaker gearbox works fine with all of them though). I've also got a couple of unknown branded layshafts that line up ok with the c/r gearbox but I'm a bit reluctant to use them in a tuned engine. Looking in Stickey's 3rd edition he mentions grinding down part of the layshaft close to where the oil seal goes. Page 81. I can't get my head around how this might help, as even if it allows the layshaft to be pulled through the bearing further it'll just take the gears with it I presume? It would seem more logical to turn down the top of the layshaft slight so that the gears sit higher but that would be too easy so I'm not seeing the obvious error of going that route. Anybody have any constructive comments to add?