Leaking Dakota transmission line question

I noticed today some drip spots on my driveway where I park my 04 Dakota. When I got underneath to take a look I noticed the trans lines were wet in one particular spot. When I wiped them off, some rust fell off and the one that was the leaking one started to leak even more. I called the dealer and it is around $150 for both lines, one just under $50 and the other just over $100. Not sure which one is the more expensive one but with my luck the one that is leaking is probably the $100 line. What I would like to know is, could I just cut the line where the leak is and splice in a piece of rubber hose like fuel line or are these lines under enough pressure that I should replace the entire line?

cut out the rusted section and put flair type connectors in it. or the very least a compression style coupling.
Rubber line is simply a band aid and will fail sooner than later

You are better off repairing the line with steel instead of rubber as gtx6970 said. However there are rubber hoses on transmission cooler lines from the factory. If you cut out the bad part. Flare the ends a little (I use a double flaring tool but just lightly flare the line with the bubble) and use hose designed for transmission fluids it would be fine.

If you are going to use hose as the repair, use these type clamps

https://www.napaonline.com/en/p/BK_7051225

In the appropriate size of course. The old worm type just chews up hoses.

I took another look at it and I think I will try and repair it with metal tubing. Looks like 5/16" tube as the O.D. is 3/8". Would the tubing and fittings be something Oreilly's or Advance Auto would carry? Is it just mild steel tubing like fuel line? I will also have to put a bend on each end. The lines come down from the side of the trans., run straight for about 6 inches and then turn up again. The entire 6 inch horizontal section of both lines is rusted out but the vertical parts aren't rusty. So I will have to put the fittings on the vertical parts and bend the tube to run the straight section. I have a flaring tool I've used on copper tubing before but haven't tried it on steel tube.

I've used mild steel tubing for trans lines for years. If you splice it with a rubber hose, be sure you use hose that is for trans fluid. I put a little flair on the line, put efi hose clamps and a little white grease to get the hose over the small flair. If the line is bad for more then 12", I would splice in a steel tube. Gene

tubing is measured by the OD, so if it measures 3/8", then it's 3/8" tube.