Hope someone on here works on these and can shed some light on a problem we have.

Aside from the engine problems we had on my Son Dan's rpu (which should now be fixed with the new motor) he also had a persistent fluid leak from the TH350 transmission. If the car sat for a few days a puddle would form under it, about in the area of the front of the pan. Since fluid will travel it was hard to see where it was coming from, so we kept wiping it clean and trying to find the source.

We replaced the shift shaft seal, the pan gasket (now using a cork one with a good, thick aluminum oil pan) and still it leaks. There is nothing dripping down from the seal on the front pump, it is dry, however, last night when we were looking at it we see some seepage directly under the large round plate that you remove to get the front pump out. I think this is called the front pump cover.

We had this trans built and then we found we had broken off the tangs on the front pump so we had a local shop replace the pump for us. Is is possible when they put it back they pinched a gasket or seal that goes in there? I have also heard there are flat seals on all the bolts that go around the perimeter of that cover.

I stopped at the transmission shop that did the work the other day and he says this is common for th350s and is called "convertor drainback" and recommended a check valve they sell to go in the cooler line. But the th 350 in my 23 never leaked a drop so I tend to wonder about that.

Any help will be appreciated.

Don