Should a Trans cooler be ran in series with the Radiator or ran by its self????

 

That's a long and involved discussion, with many variables. It depends on what you are trying to do.

If you want the most cooling for your transmission, pipe it in series and after the radiator.

If you are concerned about overheating your engine, put it before the radiator, or by itself, bypassing the radiator.

If you want the best of both worlds, put them in series, one before and one after.

 

I tow a Boat that is about 1200 pounds MAX a few times a month. So I think it would help to have a Trans Cooler.

 

Couldn't hurt. I rock crawl so I kept mine plumbed into the rad.

 

trans cooler is great idea any situation.
Cooler trans = longer life trans
go thru rad and then thru cooler in most applications.
BlueRidgeMark has good advice if your looking for additional engine cooling to run one before the rad!

 

Hayden sells a line w/built-in bypass. They can eliminate the trans cooler. I have a '95 w/4.0. I tow a light trailer (<2,000 lbs) a lot. I'm installing the Hayden 699.

 

After the cooler in the radiator sprung a leak and turn the trans fluid into a strawberry milkshake, I bypassed the radiator and used only the B&M 70268 I've had for a number of years. I abuse mine pulling a 2,500 lb boat up some pretty steep grades, kicking down into 1st at 20 mph in multiple spots, so I thought it would be good to install a temp gauge to keep an eye on things. I installed an Autometer gauge this past fall; I can't yet say how hot it's getting, but I can definitely say that it's not warming up. I can drive the 12 miles to work and it never get above 100°F if I don't hit many of the lights. I got it up to 180°F once this winter, but generally it doesn't get above 160° with multiple stops/lights; no stop-and-go around here... If it's below 40°F, it settles in around 120°, down around 20°F, it drops to 100° after a long enough straight stretch. If you live in a climate that gets down around freezing, you're going to want to route it through the radiator to warm it up enough to evaporate off the condensation that's sucked in through the breather as it's cooling down. One of the worst thing you can do to a vehicle is short trips without getting it up to temperature; the condensation never gets a chance to evaporate...