I was replacing a leaking wheel cylinder and came across an issue I didn't know was out there until I searched here and it appears pretty common. Had to order an aftermarket cylinder since it looks like the one I needed isn't available from Toyota any longer. I installed it without any issues - very easy. Went to add the shoes and it wouldn't seat all the way down on the adjustable side on the new cylinder. I read where some people ground the slot to make it large enough to fit it.
The fix in case someone else comes across this issue - I was able to unscrew the insert with the slot and luckily the threads matched and was able to swap the old insert into the new cylinder. I was able to do this without removing the newly installed cylinder which was a plus.
Photo below showing the slot size difference
Showing the parts that I swapped out - these are the ones I didn't use (I didn't think to take a picture of it until it was already swapped/assembled) but wanted to show how it came apart if someone needs it
The fix in case someone else comes across this issue - I was able to unscrew the insert with the slot and luckily the threads matched and was able to swap the old insert into the new cylinder. I was able to do this without removing the newly installed cylinder which was a plus.
Photo below showing the slot size difference
Showing the parts that I swapped out - these are the ones I didn't use (I didn't think to take a picture of it until it was already swapped/assembled) but wanted to show how it came apart if someone needs it
