Hello and sorry if these questions have been coverend as I didn't see them when I searched. I found a six pass tube and fin cooler with a fan rated for around 15,500 gvw. I read somewhere that tube and fin coolers aren't recommended for overdrive transmissions. Does anyone know why and if it's ok of I use one? Also, I'm going to install a gauge as well. Where do I want to install the sending unit? I'm also going to install a fan temperature controller. Thanks for the help!

a tube and fin isnt as efficient as the stacked plate but it will work. it should have come with an adaptor to mount the sending unit. if it didnt you will have to get a fitting to work and install it inline with the line going to the tranny. bottom one.

Hey thanks for the help. I just keep worring that I'll get a cooler thats too big and it will make the transmission too cool. I want the fan and thermal switch because there's a lot of traffic in my area and the car gets up to 230 degrees or so so I figure that a fan that kicks on at 180 could do some good.

The trouble with tube and fin is that they're a series of 180° bends. More bends = pressure = heat. The stacked plate are a straight shot sideways and run cooler.

Some people like transmission coolers with fans. Others use them without a fan and simply let the radiator fans pull air across them. I wouldn't worry about having too much cooling. You said yourself that the car will heat up to 230° fairly easy. And you do live in California.

I use the Long Tru Cool cooler myself. It's a stacked plate design that has a built in bypass that allows fluid to bypass the cooler if it's too cold outside. Works great in Texas heat.

Really the only people who will have trouble with transmission fluid being too cold will be the people who have bypassed their radiators and are driving on the highway at freezing outdoor temps. They can get around that by running their setup through the stock radiator (acting as a fluid warmer) and then into their transmission cooler. Or they could get a cooler with a built in bypass like the Long Tru Cool.

I have my cooler bypassing the stock radiator since I live in a hot climate. Radiator runs cooler. And the transmission is protected from a radiator boil over (if it were to happen). I'm running the 11x12" stacked plate design. Keeps the transmission cool. And during the rare day when it does hover around freezing, I still have the built in bypass to keep the transmission warm.