I would like to replace the leaking transmission line.The line leaks at the..not sure actually name.but the coupling or threaded part ..where the line connects to the transmission.I can't find a replace part at any of the local parts stores. Any idea where I can get a replacement.The truck leaks fluid spots under the truck. I am afraid to over tighten it. Any ideas are welcome ..Thank you for your time.

My 1 Owner , now mine...1992 DLX 4x4.235k miles auto.