I have a B & M transmission cooler https://www.summitracing.com/int/parts/bmm-70297
my engine in 555 "BBC and 6 x speed 4L80E TCI automatic transmission, BeCool aluminum radiator, my stall speed is 3400, my question. should the transmission cooler install on the BeCool radiator, or directly from Automatic transmission to B & M Cooler.

what gives the best cooling......

BR
/Kim
From Denmark

 

Water, being more dense than air, makes a much better cooling medium so run the cooler line to the engine radiator, then from the radiator to the auxiliary trans cooler and back to the transmission. If you mean where should you mount the cooler, then ahead of the engine radiator is the normal and preferred location. Do not run those plastic pins through the engine radiator to hold the aux trans cooler. You can mount the cooler to the radiator support, but mount it with a bracket-type mounting kit or make your own mounting brackets.

 

I use a go to hell engine oil cooler for my 200 4r automatic.....thing is about a foot square and at least 1.5 inches thick, I can run out on a 100f day off the freeway into stop/go traffic on way home, engine at 200f or so, and just with the cooler in the trans circuit....trans runs at 140f temp....Dual Spal fans, wish I could run my trans at 50f or so, take a HELL of an air conditioner, but colder it is, better it like to shift..put it this way, I KNOW when it shifts in what passes for winter down here.....

 

Thanks for the answer,

 

I disagree a million percent with using the cooler in conjunction with the radiator. And if someone comes on here and says the rad helps heat fluid in cold climates I may slap them .. lol...

I use to run 2 transmission shops . performance , towing and HD use we never connected a trans cooler to the radiators cooler .... Matter of fact GM issued service bulletins for many S-10 trucks to by pass radiator and install a stand alone cooler when a client was towing with the s-10 .

The ideal trans temp is 170 and lower. Easily maintained using a stand alone cooler. I run a 427 SBC with a 4L80e and a stand alone transmission cooler. Temps even on a humid killer hot day never break 172 degrees even when my motor is hitting 197-200 degrees.

So go it alone ... leave the radiator out of it and get a cooler rated for 28,000 pound tucks or greater.

 

Absolutely Agree!!!!

I obviously don't have your experience as a professional but I have been running stand alone coolers since 1979 in all my cars that I own or have owned outside of the radiator. I agree that this nonsense that coolers should be run in conjunction with the radiator cooling is counterproductive to what you are trying to achieve by using a tranny cooler. ......the lowest tranny fluid temp possible. Yes, water is a better cooling medium than air but only if the water temp is low which it is not in a car cooling system. BTW-my 2008 Chrysler 300 which is driven all year round and in very cold climates has an air to air tranny cooler from the factory (no radiator cooling thank the Lord)...no radiator cooling....Maybe the OEM's finally woke up about not heating the tranny fluid with very hot coolant. I use a 28,000 GVW Long/Dana double stack cooler in conjunction with the factory air cooler...no issues.Run (2) Long 18,000 GVW coolers in the grand prix coming up on 200,000 on the tranny in the winter as well...runs about 125 degrees which is just perfect...135-140 in the summer..temp control built into the cooler...works perfectly.

BTW-Never have had a tranny fail on any of my cars a few with BIG mileage...hmmmm. so much for those that subscribe to theories

 

I agree with running the cooler separate from the radiator as others have suggested. In fact that's the way I still run mine.

But,.....when I blew my first 700r4 the vender got out of honoring the warranty because of this. We both knew the tranny did not fail because of any heat related issue, but it was his way out. Just saying......

 

I am just curious, how did the vendor know that you were running a stand alone cooler? Also, how big a cooler were you running and was it a double stack cooler like Long/Dana? Lastly, were you running a mechanical fan pulling air constantly over the cooler or electric fans? All of my three cars with stand alone coolers have electric fans but I also bulk up on the BTU's since the fan is not always on when the car is not moving in hot weather (AC is on though if it is very hot and will always run the electric fan in hot weather) but I have never had an issue nor seen elevated temps (I check periodically on very hot days). The highest tranny fluid temp I have seen is on the mustang GT with total coolers of 42,000 GVW on a near 100 degree day of 145-150 degrees...not moving with electric fans operating

 

The cooler I have is I think rated at 34,000 lbs and is a stacked plate type. I have a 16 inch electric fan pulling air through the cooler and radiator.

The vender had a "installation doc" that stepped the end user through their accepted installation, and even required pressure checks recorded with their tech support department prior to driving the car. Pretty picky. Once the warranty issue arouse, again the questions were asked about the install, and me being honest,... told them I had not used the internal transmission cooler because my aftermarket aluminum radiator did not even have one. Even though I had a transmission temp gage connected and monitored that the temps never got over 150 degrees,...they voided the warranty. I even had a local transmission shop diagnose the failure and speak with them on the phone.....still not covered.

 

Wow! Sounds like they have it all figured on how to get out of warranty claims even though it definitely looks like the failure had nothing to with the cooler.....Sorry about that outcome..sucks.

 

My 69 Coupe TH2004R needs a new radiator, I will mount a extern oil cooler.
So what radiator would be the best buy, a radiator for 4 speed or autotransmission?

 

AND WHY does my massage makes links in my text?
I don't put them there..........

 

Definitely run the transmission cooler independent of the radiator..... You don't need hot engine coolant heating up the transmission.. You want the transmission to run as cool as possible.

The B&M 70297 cooler with the fan is a damn good one.

 

So manuel radiator can be bought, great.
The oil cooler is Kim's (OP's) old cooler. I'm not sure what brand/type it is.
Do you Kim?