I noticed a slight leak from my trans cooler, went by my local shop and dropped it off. He knows I use my sub local mostly for shopping, he called said he due to rusted lines eliminated the cooler. He said with my very light usage it can do with out!
I am just not sire I should leave it or replace the lines and cooler. All thoughts appreciated.
Phil

You'll be fine without it.

If it still has the in-radiator cooler, you'll probably be fine.

If your version of local shopping is grocery store, antique shops, and yard sales, then it will be fine.

If your version of local shopping is Ritchie Brothers Auctions where you'll be towing a skid-steer and a boom truck home, then you will want to install a new auxiliary transmission cooler.

"Mostly for shopping" means sometimes for other stuff that is not necessarily shopping.

If the other stuff includes going to the dentist, seeing a movie, partaking in a local vineyard, or having lunch at Windamere, then it will be fine.

If the other stuff includes high speed and stress such as off-roading, excessive traffic in high temperatures, towing anything, being chased by mobs of paparazzi through New York City, etc., then you will want to install a new auxiliary transmission cooler.

Personally, I'd still replace it, even if with just a generic cooler, especially if I was going to keep it for a long time. If it still has the oil-to-coolant cooler connected, it will probably be okay.

Ethically: If the mechanic removed the auxiliary cooler completely (instead of just leaving it and bypassing it), then the next owner has a reasonable chance of not expecting that it has a functional auxiliary cooler. If not, then I'd have it removed.

Long-term: This is a 22 year old vehicle and I don't know the history of the transmission. The engines were just about bulletproof, and were happy to gleefully outlive everything else in the vehicle, then get pulled out and swapped into something else and outlive all of that too. The rest of the car was solid as well, except for rust. The big weak points on these were the transmission and occasionally the transfer case. If you're sure you will never ever ever get it hot, then you're probably fine. If you're going to occasionally tow/haul/climb/evade/etc. you might want to add something.

Thanks for the comments have a great day!