Building a a 400 to 512 to go in a 68 Charger with auto. Rad has no provision for transmission cooling. Pro Trans (Lancaster CA) is building the transmission, Sportsman series with a few upgrades. I expect 600-650 HP and 700 torque at the crank. Don't have a converter yet. Street car only, 3:54 rear. Looking for a cooler recommendation for this car. Currently B&M Super Cooler 71274 is at top of the list. Is this too big, too small, just right? What about Hayden?? Your thoughts

No thoughts on a brand but get the largest one that will fit & I hear a "stacked plate" type is "somewhat" more efficient/$$$ than a regular type. No knowledge if it is "the way to go".

You are using one of the best transmission builders in the county, you might ask them.

However I think you are on the right track with the 71274.

Let us know what you end up using.

I've had good luck with the generic (Hayden I think) parts store transmission coolers. You might want to go with their largest one since you don't have a cooler in the radiator.

I just noticed that your are in Arizona, so you might want to consider a trans cooler with it's own cooling fan. You can also add a trans pan with some cooling tubes in it as well.

Thanks for your input. I did ask Pro Trans about a cooler recommendation and they really did not want to recommend a particular cooler but they said they have had good results with the B&M coolers.
Frank

Most people think the stock "cooler" in the radiator is a cooler, but you will find that a lot of good effcient trannys and converters actually need heat put into the fluid from the that "cooler"
I would take your radiator to a good shop and have them swap the bottom part to one that has that heater/cooler in it and then run a tranny temp. gauge in the tranny pan to see how hot your fluids get their in the summer before adding any other additional cooling to it
The reason I'm saying and advising that is I had a tranny temp. gauge in my first Cummins powered pick up (1998 24 valve with the OEM tranny) with the factory towing package, that stupid tranny fluid never got above 140 F driving the crap out of it on the high desert on Victor Valley in the summer empty, NOT GOOD
It would get up to around 230 F when towing my 24 Ft Pace Shadow enclosed trailer up the Baker grade(14 to 18 miles straight up it going from 800 Ft. elevation to 4400 ft. at the top) at the top in August after lunch running it up there at 70 MPH locked out of O.D., it would cool down to 160F as soon as I let off to coast down the other side, it would run between 160 and 200 F on the flats towing it between 70 and 85 MPH in the summers going to the races in Las Vegas or Bakersfield
Most of the additives in all ATF are design to start working at or above 160 F, not cooler

The trouble with generic Hayden coolers is the slip-on hose connections held on with worm drive clamps that are prone to leak. High pressure hoses with screw connections like power steering hoses would be much better.

Anyone have any pics of a clean install? Looking for ideas.

B&M plate style.

I have a plate type cooler in my '68 A-Body, but space is limited. Fluid does flow through the trans for warm-up etc and then passes through the cooler.

It did not shed heat very well 225* when drag racing without significant cool down time between rounds. I'm adding a second plate cooler that's the same size next to the existing one on the passenger side. I don't have enough room behind my grill for a really tall single cooler, so I will run a similar second one in series.

I would like add a ball valve or two to keep the fluid from running through the radiator when I drag race. A simple ball valve or two in the lines should do the trick. Is anyone else running a bypass set-up like this or a thermostat set-up?

Thats odd. I haven’t seen any temps above 190 on my 200-4R whether I am cruising, in stop and go traffic, racing, etc. I do not run my lines through the radiator. Are you getting good air flow through the cooler?

I run the B & M plate style as well....not the best pic but its there on the lower right