Leaky seal or bad torque converter?

[Z2TT]

Hi guys,

I read somewhere a while back about causes of a leak from the GM 4L60-E Transmissions.
It was mentioned that a leak around from the torque converter area could be caused by a damaged torque converter spline or something, i'm not sure exactly what it was.

I have a leak from there, just wondering how to tell if the leak is caused by something other than a seal, as I did read somewhere about some spline or shaft being damaged causing a leak.

Thanks.

[Tree cutter]

If the torque converter has a worn shaft where the seal runs it will leak. You can fix the shaft using a speedy sleeve. The seal would be the most likely cause of the leak because the lip of any seal will eventually wear down until it leaks. If any dirt or grit gets trapped under the lip of the seal then the shaft can wear at the area where the lip of the seal touches it, leaving a groove in the shaft.