I have a 4T60E transmission on my 3800 '93 Transport. Rebuilt trans. at 130K . Transmission now (195K miles ) , leaks like a sieve on the left side of van . Redid the pan twice - that wasn't it . Noticed flow coming down left side , looked maybe like it was coming from left output shaft seal so I replaced it . checked splined output shaft in tranny for looseness and found none at all ( like it might deflect seal enough to leak because of worn bearing) . I am now thinking the red transmission fluid leak is coming from something ABOVE the left output shaft . My question is : what is above that area that would leak a stream of fluid , especially when I give engine more gas ? Is there some leak- prone device above there that I can replace without a $2600 transmission job ?