If any one has ever rebuilt their transmission what tool did you use to remove the locknut that is all the way down the shaft. Mazda calls out for SST 49-1243-465a but I can't find it anywhere. I can just cut the old nut off, they are supposed to be replaced any way, but I would still have the problem of putting the new one on and torqueing it down. Any help or suggestions (pertinent) would be appreciated.

 

the stock tool is like a socket that is whatever size, but its like a foot and a half long.

you could buy the right socket, and then weld a pipe to that.

 

When I was rebuilding my S5 NA transmission probably 5+ years ago, I tried to buy that special tool too. Like you said, it's not available. So, I built a tool to remove that nut. It's not as simple as j9fd3s has alluded to. There was a lot of grinding and machining involved. It took a long time just to make that tool. I also talked to a guy at a transmission repair shop. He said that they usually use a hammer and chisel to loosen that nut. The chisel is positioned at an angle such that when struck with a hammer the chisel will spin that nut off. They also tighten the new nut with hammer and chisel.

 

the special tool is a hammer and chisel, as hot dog said. just try not to mangle it up too much, and put it on a grinder before reassembling to knock off the burr.

 

i like a good snap on air hammer. smooth triggers are your friend.