Originally Posted by big_news_1

I put mine in series with the stocker and mounted it in front of the radiator. If you order one online or go to Autozone or O'Reillys you'll get some handy instructions inside the box. I did a little searching here on BC, but I mainly just followed the recommendations that came with the cooler.

As for the automatic bypass, I'm afraid I can't help you. I know nothing about a device like this.

When I hooked it up in series, I put the auxilliary cooler after the stock one, so I unhooked the return line of the stocker. The return line is the top line coming out of the passenger side. I sent a line from there to the aux. cooler, then piped the return line of the aux. cooeler into the metal line that runs back to the tranny. If that'* a little confusing, I'll try to explain it differently. Also, I'll try to get some pics up if you'd like 'em.

EDIT: By the way, I think my cooler is a Hayden 404. They rate the coolers (at least here in the States) by GVW cooling capacity. Mine can handle something like 24,000 lb. GVW or something like that, which is considered a cooler for a light truck. You'll probably want a cooler that can handle 18,000 GVW minimum. Most major brands should be fine... Hayden, B&M, Derale, Perma-Cool, etc.