Bought Huge Tranny Cooler.. Dont use stock cooler? - Toyota Nation Forum : Toyota Car and Truck Forums

RedPhoenix · 03-22-2006, 09:19 PM

Should I just run my new cooler (Hayden 405 10x15.5x.75) and my stock radiator cooler or should I just run the new cooler and cap off the stock one?

touringcamry · 03-22-2006, 09:28 PM

The installs I've seen on this board, people ran the cooler in series, before or after the stock cooler, typically after the stock cooler.
Fluid flows:
Transmission->stock cooler->aftermarket cooler->transmission

The reason for this is because the stock cooler will cool it some and the aftermarket cooler will cool it even more.

Luckynumber5 · 03-22-2006, 10:17 PM

How large is the cooler? I have a 18000 gvw rateed cooler on my 93 v6 and I do not have it run in series, I have a 28000 going on my 4af-te celica, when the cooler is that big you put strain on the pump when it has to move it through the radiator cooler and the aftermarket cooler

touringcamry · 03-22-2006, 10:52 PM

^

holy crap!! That thing would be huge, like the size of the radiator

Luckynumber5 · 03-22-2006, 11:01 PM

LoL, sorry edited the size was a little off, but no its barely there at all compared to the 3vz-fe's radiator!!! The strain on the pump isnt that terribly bad, but the external cooler can handle the heat transfer on its own just fine and you will be saving the pump a little extra stress

eecc · 03-22-2006, 11:56 PM

I've always wondered this, can the tranny fluid ever be too cold? Would it be a good idea to have a thermostat of some sort so the fluid can warm up during cold weather before getting pumped through the external tranny cooler?

touringcamry · 03-23-2006, 12:03 AM

Quote:

Originally Posted by Luckynumber5

LoL, sorry edited the size was a little off, but no its barely there at all compared to the 3vz-fe's radiator!!! The strain on the pump isnt that terribly bad, but the external cooler can handle the heat transfer on its own just fine and you will be saving the pump a little extra stress

I've driven 25999 pound gvw trucks (intentionally rated like that so we don't need CDL) and they had huge tranny coolers. 14000lb curb weight, 466 cu in I6 diesel, 5 sp auto 4WD with 2 sp transfer case - it wasn't fast but had massive amounts of torque.

Luckynumber5 · 03-23-2006, 12:04 AM

Trucool coolers (by Long) have a neat bypass feature so when the fluids too viscous it will not go all the way through the cooler, once the fluid is warm you will have a hard time overcooling, which is not true for engine oil, it needs to be hot.

Luckynumber5 · 03-23-2006, 12:06 AM

Eh if you dont believe its necessary just look at most performance setups that use automatics, they all have transmission oil coolers installed, large ones!

Anyway, the cooler for the Camry is 7 1/4x11x3/4, not that big, the Celicas cooler is 11x11x1 1/2!!!

touringcamry · 03-23-2006, 12:11 AM

^ I guess that makes sense. I just couldn't imagine the tranny cooler from my work truck on a Camry. But then again, the truck platform is supposed to be for medium-heavy duty trucks like dump trucks and snow plows, but the few we have, have stake beds and we only have them because they have 4wd on them. The rest of the fleet is RWD.

RedPhoenix · 03-23-2006, 04:41 AM

with the added heat of the turbo... im till not sure lol.

***Eye8Pussies*** · 03-23-2006, 12:10 PM

I would just run the single big one unless you feel that things start slipping because the tranny is heating up- otherwise, it could be worse if the oil isn't circulating properly

I personally have a big one sitting around in my garage that my neighbour gave me that I will install when I go back to my summer trim, and it's made for a dodge dakota, so it's about 2 feet long and 8 inches tall

mspringer · 03-23-2006, 05:45 PM

I think it is recommended by any aftermarket cooler mfg that you NOT bypass the stock cooler. The reason is that the air to air aftermarket cooler cannot cool the fluid when the car is not moving, so sitting at stoplights, stuck in traffic, or screwing around in a parking lot may cause the transmission fluid to heat up into the "danger zone". Running it through the radiator will at least cool it to the radiator fluid temp.

By the way, I do not have an aftermarket cooler in the Toyota (yet), but I think its a great idea, as the jap car factory coolers that I have looked at appear to be just one row on the bottom of the radiator, which just doesn't seem like enough to me (although my Altima went 190k without trouble, so maybe I'm just paranoid.)

When I added a cooler to another vehicle, I saw a 10deg drop in engine coolant temps, measured with an autometer gauge, so you may see some reduction in coolant temps as well.

Luckynumber5 · 03-23-2006, 05:52 PM

^ Thats an interesting point, but ive had no problems in the 20k miles my cooler has been on the car, the 3vz-fe only has one fan I dont remember if the 5s-fe does or not but you could simply put the cooler (they mount anywhere on the radiator) in the fans airflow so when you are stopped it has air moving through it, the transmission oil should never get to a dangerous temperature at a stop unless you are powerbraking (never powerbrake for more than a few seconds, it really heats that fluid up)

Also RedPhoenix flush your transmission out and switch to a nice synthetic fluid, they tolerate heat a lot better than regular tranny oil, it will help.

WestCoastff · 03-24-2006, 02:45 PM

Quote:

Eh if you dont believe its necessary just look at most performance setups that use automatics, they all have transmission oil coolers installed, large ones!

Anyway, the cooler for the Camry is 7 1/4x11x3/4, not that big, the Celicas cooler is 11x11x1 1/2!!!

Yep, On auto's almost all the f/i guys use the bigger hayden cooler's, they fit up nicely right in front of your stock radiator. Mine is at my friends house right now but it beleive its rated to like 25,000lbs or something? It never hurts to be safe, and for S/C its pretty tight cuz it looks like a big front mount, then people hear the whine of the blower.....