Now we need to install the 2243-41 gear shifting cam. I've already pointed out the number 3 mark on the 2241-41 shifter gear. This mark is what we will time the gear shifting cam to. The gear shifting cam has its own timing mark identification. The small gear, affixed to the end of the gear shifting cam, has one single beveled gear tooth on it. "SEE PHOTO" we must install the gear shifting cam, so the beveled gear tooth, will align with the number three tooth, on the shifter gear, when the two gears mesh together, as they roll with each other. This is a bit tricky and may take several installation attempts, before you get the two gears, timed with each other correctly. The trick is to rotate the gear shifter lever shaft assembly until you locate the number 3 tooth on it, and then re rotate the gear shifter lever shaft assembly, clockwise, until the last tooth of the shifter gear is in a vertical position, facing up. Count the number of teeth, from the number three identification, which was rolled away. Now we can slip the 2243-41 gear shifter cam into its position. To do this, we must position the open clearance slot on the right end of the gear shifter cam, in position to enter the transmission case first, with the clearance slot facing down, in a vertical position, while keeping the gear shifter cam square and parallel, to the transmission case, and gently lowering it into position with the shifter gear ,and the 2244-41 gear shifter camshaft bores. Locate the beveled gear tooth on the gear shifter cam and roll the gear shfter cam the same amount of teeth, for which you rolled the shifter gear, the opposite direction, before you allow the to gears to mesh with each other. there is enough room in the gearbox, towards the rear of the gearbox, to do this. We now must simultaneously align the gear shifter cam shaft bores to the gear shifter cam shaft, and the gear shifter cams gear teeth to the shifter gears teeth, so that when the two components are rolled, once the gear shifter cam shaft is installed, the beveled gear tooth, on the gear shifter cam, will mesh with the shifter gears number three tooth mark. Don't force the gear shifter cam shaft into position. If it does not go in freely, you do not have all the positions aligned properly. This usually takes several attempts before successful. Once you accomplish this, you now need to slide the gear shifter cam shaft into the gearbox gear shifter cam shaft bore, from the right side, on through the shifter cam, and into the gear shifter cam shaft bore on the left gearbox side. Now we need to roll the shifter gear lever assembly, to verify timing mark alignment. If incorrect, try again. Once we get the timing marks alignment correctly, we have only just began. LOL !! Next.. Make sure the gear shifter cam shaft stays in position and then push the shifter cam towards the left side of the transmission case, until you are certain, the shifter cam gear face, is seated against the transmissions shifter cam shafts bore face. Now push the gear shifter cam the opposite direction, all way back across to the right side of the transmissions shifter cam shaft bore face. Using a feeler type leaf gauge, measure the distance between the gear shifter cams gear face and the transmissions gear shifter cam bore face. If more than .005”, purchase shim or shims to take up the excessive endplay. I have not read one single service manual which directs attention to excessive gear shifter cam endplay. But believe me....this endplay is critical in determining easy shifting on a 45 transmission. Though you may have held mainshaft and gear endplay tolerances, during your build, this endplay could eliminate all your effort. If you don’t take care of the gear shifter cam endplay now. .003” to .005” is what you want, if you wish not to compromise your previously set tolerances, and your, yet to come, shifter fork tolerances. Installing a shim between the gear shifter cam and the transmissions gear shifter cam shaft bore face is tricky also. You will only want to do this once ! It is not necessary to install the shim now. What is necessary, is to know a value on the shim needed, if one is needed, This value will play a part while adjusting shifter fork specifications and when shifter fork adjustments have been completed. To get around the lack of a shim, during shifter fork adjustments, we will position the gear shifter cam, always against the transmissions, right side gear shifter cam shaft bore face. You may ask yourself...why is there not a part number for such a gear shifter cam shaft shim ? I will tell you why. When these old transmission were first built, the clearances were already machined in. There was no need for another part. Over time and use, the transmission case, gear shifter cam shaft bore faces, wore down, creating excessive endplay clearances. You may also ask...How did the mechanics repair this ? They didn’t repair this ! They replaced the transmission case, and or, the gear shifter cam. Continuing.... Now we get to take all the gear shifter cam components back out of the transmission case. Don’t worry though...we get to put them back in and take them back out, several mores times yet. LOL Because..... we have to remove and install them again so many times, we need to remember what we just did, when installing, and removing them. The three photos below reference this segment of the build.