I don't have much room for a transmission cooler in front of the radiator. My truck weighs less than 3000 lbs. And has a 727 mopar trans, stock converter. Its a cruiser/driver no heavy usage. Could I locate at LARGE aftermarket trans cooler (say 10x15) under the truck, with out using a fan with it. My radiator DOES NOT HAVE a built in cooler. Thanks
I have one like this. I didn't get it from Speedway they just had the picture. I was told the design is good when there isn't a lot of air flow. I don't have a temp gauge on the trans so I don't know. I have 10,000 miles and no issues that I've noticed. http://www.speedwaymotors.com/Aluminum-Heatsink-Transmission-Cooler-15-Inch,39840.html Bill
I used to use one like that. All it did was save me a foot and a half of transmission line. Other than that, it was worthless. I switched to the finned type with a tube that makes 4 passes.
On my '33 Willys coupe I have a Hayden waffle style trans cooler mounted beside the driveshaft. Yup, I forgot to specify a trans cooler when I ordered my custom radiator. It is adequate for all but the most severe stop-and-go driving conditions (e.g. The Woodward Cruise). I plan to add a small fan ala a bilge fan or a brake duct fan that is fairly cheap. I have used these fans on my race cars with a thermostatic control with great success.
[FONT="]no need a cooler? 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A bunch of guys I race with put them under there cars, as far back as the rear wheels. I would imagine on the street, you gona need something to any block debri from hitting it...
Under car is ok,...and with a fan added, you're good. About temp,...ATF goes south around 350 degrees, so as long as it remains below that,..ok. I ran a temp gauge on a C6, behind a 6.9 diesel. When I changed over to full synthetic ATF, the temp ran 15 degrees cooler. 4TTUK
I used one like LongT posted only a dual pass version 18" long. Car weighs 2860lbs and has 727 with stage 1 convertor. I was doubtful about the cooler so I fitted a temp gauge - rarely gets up to 160. Cooler is on the inside of the frame rail above the exhaust with a heat shield over the exhaust. Done 11k miles no probs.
I've had numerous hotrods with the trans cooler under the car, or laying horizontally below the frame. Just sold one this year that I had set up that way for over 30 years with the same trans, and no issues. I've got the same setup on my Austin gasser, as it also is restricted room. I do run large coolers, but no fan, and that seems to work fine.
I just installed one of these mounted to my inside frame rail: Mr. Gasket 7365G Satin Aluminum Dual Pass Transmission Cooler. I like it because both fittings are on the same end, so it makes for a cleaner install. This was cheap too at like $55 on Amazon. . This was to replace another style, also mounted to the frame rail, that had broke loose from its mounting and hit the pavement. Needless to say the puncture and subsequent loss of ATF left me stranded!
I recall on some mid 50's Fords after they went from air cooled units the cooler was mounted on the side of the trans.
knew guys in the 70's that ran those on there O/t street/strip cars and never had a issue . just do not paint it leave it raw and unpolished and try to keep it away from the frame about 2" so air can get around all sides of it and run steel lines to and from it to help wick off some heat . you can also look into a small plate style cooler and mount it flat with a fan above blowing the air down , or snipe a plate cooler out of a newer car radiator that has plastic tanks just have to rig some mounts for it , junk yard has hundreds of broken radiators now days to get one , just have to use metric to sae adaptors ) on my race car SS/KA which used a th400 we used a ford powersteering cooler . they are tough as nails as they mount them up front of the motor and in later years on the front of the suspension crossmember ( my frinds O/t car uses one from a 96 explorer )
I have been using a Setrab cooler I purchased from Godman Performance on my Deuce roadster, 2400 Lbs. 55,000 miles, with no problem. It's mounted on the frame rails under the passenger seat. One thing I did do was fabricate a sheet metal scoop to catch the air.
I use the same one, same location hooked up to my 700R4,,,checked temp and its good.. 4000 miles to date. Not sure how it would be suitable when towing,,,have not tried yet..
The key to it working is the fact you said a stock converter, with that said you will have no problem mounting a cooler under the car. The more air flow the better but its not going to over heat with a stock converter and normal driving. I can say this because I have done plenty with no issues. Its going to be a lot better than a 180 + degree radiator as a cooler!
I have two, one in the chassis rails of my F4 truck and the second connected to that with a fan. Rarely do I need to turn on the one with the fan. Mind you the C6 has a full manual shift kit.
I ran a steel tube loop (abut 3' long) under a big early 70s Chrysler wagon for a trans cooler for 2-3 years (probably 10,000-15,000 miles) without issues, and I beat the crap out of that car. Those 727s are tough. Gene
According to ATSG (Automatic transmission service group)the optimum temperature of transmission fluid is 175° for every 10° rise in temperature it cuts the life of the transmission in half if you ran your transmission at 350° as stated in an earlier post you would be rebuilding it about every 500 miles.