I am in the process of swapping a 3RZ into my 89 4Runner. I want to (and at this point must) keep the original A340H automatic transmission. My donor vehicle was also an auto, and I acquired the 3RZ torque converter and bellhousing. I thought I had both mounted up to the old tranny right, but when I went to put the 3RZ in, I saw that the TC was out at least 1/2" too far, and therefore not seated correctly. I yanked the engine back out, and for the past two evenings have been trying to properly seat the TC. According to my research, the TC should slide onto the input shaft, click once, then rotate 90-degrees and click back again, fully seating. I can only get the first click. I have spun, pushed, and tapped on the TC with a sledge, but it will not seat. Is there some sort of compatibility issue I missed, or another technique to putting the TC on which I do not know? Any advice advice is greatly appreciated, especially from folks who have been here before. This is my first engine swap, and I'm very much flying by the seat of my pants!