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Ken, that is the input shaft outer bearing. That outer bearing is trapped in the 1st reduction cover between the little outer cover & a snap ring or between 2 snap rings [I believe 2 snap rings on the B but can�t remember for sure] {your book should show it}.. It sure sounds like you are either missing a bearing retaining snap ring, or the spacer between the little outer bearing & reduction gear is missing, or the 1st reduction cover bearing hole is worn oblong [rather common], or the big reduction gear splines are worn & allowing the shaft to pull into the gear too far.. That input shaft is allowed to float [slide] in the inner bearing & the only thing that holds that input shaft from moving in & out [like yours is] is that outer small bearing locked tight in the reduction cover & that outer nut pinching the bearing between the nut & the big reduction gear & spacer. Basically that little outer bearing keeps the shaft in place & from moving in & out. That stack of washers is not correct & there is no gear lash or engagement to be set inside the transmission. That input shaft inner gear is not depth sensitive but the high/low shifter sliding gear is quite gear position sensitive as the engagement teeth are very short . Depending on what is jumping out of engagement when in 6 th gear that outer worn bearing or missing snap ring could easily be causing the problem.. You need to find out WHY that outer bearing isn�t staying tight & why that input shaft has all those washers on it that don�t belong there.
If you can�t find anything obvious you might have to pull the 1st reduction cover & see if the big reduction gear inner splines are worn & pulling onto the input shaft too far or if the spacer between the gear & bearing is missing.. Any questions on the above just post back � [email protected]
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