installing a tru cool 40k

[gavin05]

im fixing to install a tru cool 40k on my truck and my question is which way will the tranny cool better,threw the radiator then external trans cooler or just threw the external trans cooler.thanks,josh

[lechez71]

straight from tranny to the tru cool cooler. i would bypass the radiator cooler because if it burst your tranny is f****ed. heard many horror stories from it.

[RedHeartbeat]

through the tranny cooler then through the tru-cool. You need the air to water cooler to help with rapid cooling. Without the A2W if the trans ever gets hot it will take a very long time to cool the fluid down, remember, you have 2.5 gallons or more of tranny fluid running through the system. The risk is worth the reward and in all my years I've only heard of one internal cooler leaking.

[gavin05]

you have a good point and i've only seen very few internal trans coolers leaking myself in the past 10 yrs i been a tech

[lechez71]

do as you want, just consider you have been warned. you probaly wont see high temps with that huge 40k cooler.

[1slow01z71]

through the tranny cooler then through the tru-cool. You need the air to water cooler to help with rapid cooling. Without the A2W if the trans ever gets hot it will take a very long time to cool the fluid down, remember, you have 2.5 gallons or more of tranny fluid running through the system. The risk is worth the reward and in all my years I've only heard of one internal cooler leaking.

That is absolutely false, Ive had two trucool 40s on my truck. I was the first to actually get one back in 05 and ran it for 50 or 60K with no problem directly to the cooler and with teh 4200 converter I was running at one point in time I could heat the trans up to almost 200 pulling a small trailer in the the Texas summer and within a couple miles of cruising down the highway it was back to the 140 it stayed at. Ive read of quite a few guys having the end tank on the radiator bust and take out their trans. Why risk it? I see no benefit to running it in the radiator. The one that I installed on another truck and had it going through the radiator didnt heat up noticeably quicker and was a lot more connections with possible leaks. Ive got 4 AN connections in my system, the least amount possible to have the least amount of trouble.

THread with everything you need to know about installing a trucool 40k
http://www.performancetrucks.net/for...d.php?t=470284

[RedHeartbeat]

that is not absolutely false. Get a grip.

Transmissions rely on proper oil temp to work correctly, too. Drive a truck that bypasses the radiator cooler in the winter and you'll have a hard time getting the oil temp up to where its supposed to be. Sit in stop and go traffic in 100+ degree for 1/2 to 1 hour and kiss the bypassed transmission goodbye after boiling the fluid. Air flow is critical on an air to air cooler. Just my two cents. If A2A worked GM, Ford, Toyota, Nissan and every other manufacturer would put in every new vehicle. Do it how you feel comfortable, remember it's your money.

[RUFFNECK]

I thought those radiators came with a hard plate line for the tranny? Meaning there isn't really a seperate tank for the tranny, its a plate line that sits inside the radiator with coolant flowing around it. I would think the radiator tank would blow first before before that steel plate did for sure. I think they started this with the 03's?

[1slow01z71]

that is not absolutely false. Get a grip.

Transmissions rely on proper oil temp to work correctly, too. Drive a truck that bypasses the radiator cooler in the winter and you'll have a hard time getting the oil temp up to where its supposed to be. Sit in stop and go traffic in 100+ degree for 1/2 to 1 hour and kiss the bypassed transmission goodbye after boiling the fluid. Air flow is critical on an air to air cooler. Just my two cents. If A2A worked GM, Ford, Toyota, Nissan and every other manufacturer would put in every new vehicle. Do it how you feel comfortable, remember it's your money.

Reason it however you want Greg, Ive done it and have been doing it for years. Ive installed these coolers on no less than 10 trucks and all are running fine. I drove my truck all winter with a tight as 2400 converter with a cammed LQ4 with no trans nannies in the tune and its still running just fine. Vince from FLT even made a post about it on PT that having cooler trans temps isnt a big deal. Again I had a 4200 converter behind a stroked 418 in a 5400# ecsb Z71, it doesnt get more drastic than that, living in the wonderful traffic jam that is Austin Ive sat in 100+* weather on mopac and going from one side of town to the other takes about an hour to go 10 miles where you dont get over 15mph the whole time and never had an issue with my trans. The fluid didnt even get over about 170(by the gauge cluster) without a fan or anything on it. You can postulate all you want but Ive done it have been doing it, it works and so have a ton of guys on PT. Damn near everyone bypasses the radiator. The only time I can see going through the radiator is if you live up north, but even then I wouldnt do it. Id just get a thermostatic bypass.

Skeet keeps his temps down in the 120s and everyone knows how much power and how hard he beats on his http://www.ls1truck.com/forums/site-...rum-rules.html do you think he is in for some trouble too? He has taken the 60e further than anyone I can think of in a truck for a sustained period of time, Id say hes on to something with this whole cool fluid thing. My old trans finally died after 50,000 miles of a cammed 5.3 on a 150 with almost 40 bottles through it, and a 418 stroker with a 4200 converter all in a heavy ass truck that had constant traction due to the wonderful 4wd button. It finally died after a converter swap when I got antsy to drive it and didnt go back and check the level after a short test drove and I went WOT and the 2-3 shift toasted the 3/4 clutch pack because it didnt have enough fluid. Id say it served well for being cooled the wrong way in your opinion. I know youre a smart dude Greg but I think you get caught up in the cerebral side of things and not the real world some times.

[RedHeartbeat]

Don't listen to me, I know nothing. There is only one person on this site that knows anything and can share an opinion and it's obviously not me. I relinquish the control to the one great and knowing one.