What happens in a transmission rebuild - Part 7

[Mac VP]

LINK TO ORIGINAL POST:
https://www.fordbarn.com/forum/showthread.php?t=278347

This is the second part of the PART 7 thread. Now that the mainshaft has been installed into the overdrive adapter casting, we can begin the assembly of the gears and synchronizer to the shaft.

The low-reverse sliding gear goes on first.....with the shift fork groove toward the rear. As a side note, all Ford designed 3 speed transmissions were made to keep the fork groove to the rear for this slider gear. When Ford began to buy complete overdrive transmissions from Borg Warner (ie the T-86 model) this gear was fitted with the fork groove to the front.

Next you slide on the 2nd gear (intermediate gear) as shown. It will ride up against the 16 spiral splines of the mainshaft. The synchronizer assembly will slide on next, and locate up against the front of 2nd gear. This will place the front snout of the synchro hub even with the snap ring groove on the mainshaft. When the snap ring is placed in this groove, you can test for the endplay of 2nd gear. Tapping the gear and synchro assy forward against the snap ring, you want to see 0.004 to 0.008" of clearance behind 2nd gear.

At this point, the 2nd gear bronze synchro ring is in this stack of parts. The 3rd gear (high gear) synchro ring is still loose and not ready to be installed yet.

Be sure to place the small 7063 spacer ring onto the front of the mainshaft pilot (all the way toward the shoulder where the six splines begin). The 1949-50 Mercury transmissions had the small/long pilot on the mainshaft because they were fitted with the B-7118 caged roller bearing there. The later transmissions did not use this spacer ring, and were fitted with the loose roller needles for the pilot.