I have been battling a leaky 727 pan for about a year. I tried multiple gaskets and finally purchased the Mopar reusable gasket. Unfortunately, the pan still dripped from the front left corner. I also had a leak from the speedo pinion shaft.
I decided that this was the weekend that I was going to make the tranny drip free. I took out the speedo carrier and pinion ad made a trip to the local transmission shop. They had a seal that fit and has a spring around the lip to give a better fit.
I removed the tranny pan and meticulously cleaned all surfaces on the pan and tranny. The lip of the pan was flat and showed no signs of overtorqueing. I have a tube of Hylomar Blue which I have used in the past. I applied a thin coating to all surfaces and let it tack up. Bolted everything back together and torqued to 100 inch pounds. Finally, no more red fluid on the garage floor!
