Slipping out of 3 rd on compression

[SSsssteamer]

Originally Posted by Tom Wesenberg

Before blaming the kit, are you sure the kit came with 2 short bearings and 1 long bearing?
Short = A-7118 and long = A-7121

The cluster gear takes a short and a long bearing, and the input shaft takes the other short bearing.

While trying to sort out my Model A parts pile, I just torn down 10 model A transmissions and I was surprised with the differences that they had between them. Like Tom said, some require the spacer ring on the main shaft and some don't. Some require a thrust washer at the front of the cluster gear and some don't. I even had one transmission case that didn't have the four 5/16" NC holes drilled and tapped for the input shaft retaining sleeve cap screws. Out of the ten parts transmissions, I was able to save four complete transmissions. MY shortage were transmission cases. Now that I have recent experience of what goes where, I see that Mac's sent me two long needle bearings and one short needle bearing, instead of being sent one long bearing and two short ones. Not knowing that the longer bearing didn't belong between the input shaft and the main shaft was my error. My old input shaft to main shaft bearings were a gravel pile so I didn't know how long they were really supposed to be. I was smart too late. I should have know better.