A few months ago I had the engine (350) and transmission (TH350) out for some work (replacing engine freeze plugs). As I was bolting the transmission to the engine, I don't think I had the torque converter installed all the way onto the transmission before trying to bolt it to the engine. I knew that the TC had to go on there to "two" stops...and I thought I had it all the way, but as I was tightening the bolts I found that they were very hard to tighten. Then when I went to rotate the TC to align the holes to the flywheel, it wouldn't move. I took the transmission back off and started again, and found that I could get the converter on farther, and everything went together just like it should have.

Now, I knew that this was probably bad...but I re-installed the engine and transmission anyway because I figured there's no way to know what happened until I get it back in and run it. Sure enough, the transmission leaks from the front. It seems to drive and shift fine...but it does really leak from the front. It doesn't pour out...but it does have a steady leak. If I leave it for a couple days in one spot...there will be a 10"-14" spot under the car.

I don't have a lot of knowledge on transmissions. I did replace the front and rear seals while I had the transmission out before, so I'm thinking that it's not those that are leaking. I am going to do some work on the front of the car over the winter (body panel alignment stuff). It's probably a good time to also address this issue. My question is...what did I do, and is it possible to fix yourself?

I seem to recall that not having the TC installed all the way before trying to bolt to the engine could cause some damage to the pump in the transmission. Is that fixable?

Anyone with any advice on what I may have done, what I should check, and what the prospects are for fixing it?

Or, is this a situation where the only real option is to take it someplace to be rebuilt?