[jayharrell]

The reason it leakes from the top after running it and when its been sitting along time is because the tranny has spun all of the fluid into the body of the trans and left it locked up there when in park. Kinda like pumping alot of water into barrel on top of your house then pluging the hose. *bad reference, but it might do.* When its left set for a long time the trans has slowly released all the fluid back into the pan.

So if the crack is at the top of the trans, thats the time it'll leak. If thats the case, its time for a new case. I'm unsure about the UK and how avalible a used t400 case is. But here in TX they are pretty easy to come by. a few hundred dollars will get a good case, and an other hundred or so will get a stock rebuild kit.

I agree with Panel, if you have the cash, and are going to have someone find and rebuild a t400 for you, for just a little more you could get a 700r. you'll have to get a new drive line, but hey, when it breaks, fix it with better stuff if you can afford it.