Setrab 53-10748 vs Setrab dual pass

I finally installed the Setrab dual pass trans cooler. I installed it so both ports were on the right side. This worked out very well and made routing and connecting hoses quite simple.

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The argument for in/out on the opposing corners is to make the fluid spend as much time inside the exchanger and cover as much area within the exchanger as possible to exchange as much heat as possible. If you agree with this argument, then you figure out how to build it that way.

If there is a block off plate in the tank the fluid will run through the top and out the bottom of the cooler
 
The argument for in/out on the opposing corners is to make the fluid spend as much time inside the exchanger and cover as much area within the exchanger as possible to exchange as much heat as possible. If you agree with this argument, then you figure out how to build it that way.

FWIW, back in 2022, Setrab’s owner told me the dual-pass will cool transmission fluid better than the single-pass. He didn’t say how much better, and I didn’t push him on that because that’s not why I called.

I do know the single-pass kept my 42RLE’s temps happy in brutal AZ temps while in traffic and in the rocks.

If I wanted to discuss design differences, I’d probably call Setrab to see what the owner shares since I don't know the inner workings.

Side note: The reason I called the owner was to see if my single-pass would work well for cooling water to the intercooler (I was mentally prepared for him to say no). Instead, he said it would work great and that the dual-pass wouldn’t show much of an improvement over the single-pass for that purpose. I appreciated his honesty rather than trying to upsell me. His is word was good…the experiment worked great for keeping my IATs happy under boost.
 
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I would assume so or the core would be sort of useless
The standard slim line is a radiator style. If you push fluid in the upper port and out the lower with the cooler mounted with the long axis horizontal, it will be a fair bit less effective. My contention for that is an air lock in the corner above the lower fitting. All I really know for sure was reversing the flow made a dramatic difference in how well the cooler works.
 
The standard slim line is a radiator style. If you push fluid in the upper port and out the lower with the cooler mounted with the long axis horizontal, it will be a fair bit less effective. My contention for that is an air lock in the corner above the lower fitting. All I really know for sure was reversing the flow made a dramatic difference in how well the cooler works.

So let on the lower port and outlet on top. Good to know
 
The one with both ports on the same side and the on with ports on opposing sides have the same BTU rating per Setrab. I did it this way because I thought it was easier to route hoses with both ports on the same side.
 
Left side for us is always the higher port. It routes out through a hole cut in the air dam and goes nowhere near the steering gear.

Well maybe I'm not remembering correctly. The highside on mine is on the driver's side, but hose goes down near the steering shaft. Not done with it, so I'm probably just screwing it up.
 
Hello All, thanks for the suggestions.

I have finally ordered the strap dual pass version and 6AN hose and fittings kit from amazon. I will install it this weekend. and test the difference with the old failed Derale kit.

What failed on the Derale unit? The cooler itself, or a fan perhaps?