Thanks, Clarence. So when U-Haul and other places that mount hitches and rig trailer-light saddles talk about adding a "transmission cooler", are they talking about a larger-than-stock unit (assuming the truck didn't come equipped from the dealership with a "tow package"), an additional unit, or a unit mounted on vehicles capable of, but never intended for, towing? --Craig ----- Original Message ----- From: "n9ca" <n9ca@comcast.net> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Saturday, May 08, 2004 9:52 PM Subject: transmission cooler Craig, If you have an owner's manual, it should specify the combined gross weight of the vehicle and the load it's pulling. It should also specify the maximum vertical load on the trailer tongue If you stay within the specified limits, you will not exceed the design limits of the vehicle and should not need a transmission larger than the one that comes as original equipment. Most automatic transmissions have their hydraulic fluid cooled by a small cooler located in the bottom of the radiator, or in side tank if the radiator is of the cross flow type. If you don't have this manual, try calling Chrysler Corporation customer service and ask them to direct you to someone that can give you this information. Clarence Andrews ----- Original Message ----- From: "Honshells" <chonshell@ia4u.net> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Saturday, May 08, 2004 7:43 PM Subject: transmission cooler I tow a couple times a season in a moderate (Michigan) climate on flat roads. I tow about 200 miles, or 400 miles a season. Otherwise, I use my tow vehicle only to launch and retrieve my boat on a moderate-incline ramp. I have an M17. I'm considering a '95 6-cyl. 4X2 (2-wheel-drive) Dodge Dakota Magnum with an automatic transmission. Will I need a transmission cooler?