Went by the hole to hole measurement. Hope this fixes the problem. I know it's a THM400 just wasn't sure which TC is the right one. you never know when someone else has been under the hood what they did. still not sure what they did. I'll find out tomorrow when they deliver the new one. I'm so looking forward to climbing back under that van and putting the tranny back in by myself, seeing how I had so much fun getting it out. One of the aligning pins wouldn't let go (need I say more). Just didn't like the stall out speed of 1360rpm seems like an awfully small number. I'll post once I'm back together.