Hi folks, I am installing an additional tranny cooler (B&M racing version with 1/2 NPT threads). I am going to run it in series with the stock unit

1). What size hose fitting do I need, they look like 3/8 but I am not sure.

2). On the stock cooler, which line is the return line, the top or bottom one?

3). If I need to extend the line, is there a special grade of hose that I need to use?

thank you for your help!

 

The hose is 5/16 and it would be better to remove OEM cooler instead of running them in series. With both in the line you may end up with to much restriction. It's been a long time since I ve seen a stock cooler so I dont remember which is the return but I do know that the return goes to the rear of the trans. There are special ATF hoses that are designed to handle both the pressure and heat of the fluid.

 

yeah, use the stock cooler for a powersteering cooler instead