Cooler Line
I did both the cooler line and the Mag-Hytec DD pan. Not hard to do. Pan for fluid cooling; line to mount the temp probe. As the others have said, the pan probe tells what your fluid temp is in the pan. The line probe tells you how hot the transmission is working. If you change the line, you need to change the nipple the line connects to at the intercooler. That nipple has a check valve in it as does the 94/95 line. Any plain, straight-through nipple will work (proper size of course). My transmission normally runs less than 140* (minimum reading on the guage) but will climb if worked. Only climbed to 210 so far going up a STEEP mountain road. MOPAR Line PN: 5011244AA. MOPAR Nipple PN: 0118752. Got the line from DTT; plain nipple from NAPA.
If you're going to do it, do it right the first time. BF