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Old 11-01-2012, 02:58 PM
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Transmission Cooler Question

I'm using a 200-4r in my 31 build and I've run the cooling lines to the radiator. Now i'm thinking I would have been better to use a cooler mounted under the car instead. Should I just add the cooler to the lines going to the rad or should I remove the lines to the rad and only use a finned cooler under the car?
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Old 11-01-2012, 05:48 PM
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I like the cooler in the radiator because it also warms the fluid in cold weather. My daily driver actually has a trans oil warmer in addition to a cooler. Using a finned cooler under the car makes for simpler plumbing, but you already have the lines to the rad.
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Old 11-01-2012, 06:57 PM
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Thanks sedanbob, my concern is overheating. I'm running a stroker 472 and a shortened rad.
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Old 11-01-2012, 07:03 PM
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tranny cooler

my sug is to run cooler and rad lines unless you put fan on cooler or tranny may overheat in traffic
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Old 11-01-2012, 08:58 PM
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B&M makes a stacked plate cooler that has a thermostatically controlled fan - installed in the return line from the radiator, it would insure your trans does not overheat. If you are also concerned that your engine might overheat, disconnect the trans from the radiator and just run the cooler with its fan. That way the transmission is not adding heat to the radiator.
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Old 11-02-2012, 12:26 AM
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I only have an auxilliary radiator for my 700R4, and it takes a long time to get up to 180š even idling in traffic, and it can get very hot here in Spain. Sometimes to get some heat in there I drive in 3rd gear for awhile.
I think the main reason a trans can overheat is towing not everyday driving.
As stated before a trans is plumbed into the carīs radiator is for quick warmup to get the trans to working temp, which burns off residues in the fluid.
This could work against the trans because an overheating engine could influence the trans temp.
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Old 11-02-2012, 10:03 AM
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Sounds like it might be best to add a plate or finned cooler in the lines to the rad. What line is best to put it in? How do you tell witch one is the supply and return ?
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Old 11-02-2012, 01:05 PM
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On your 200-R4, the return line into the trans is the lower tube. A stacked plate cooler has more capacity to cool than a finned tube style. While you are at it, add a trans oil temp sender. Using a sender from the same company as your coolant temp gauge would allow you to use a single gauge, and switch between the two senders.
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Old 11-02-2012, 02:33 PM
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Iīm using a B-M stacked plate cooler placed in front of the radiator.
I mounted mine to the car discarding those through the rad ties that come with the cooler.
If you really care about your trans add thermostat control and a cannister type filter as well.


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Old 11-02-2012, 03:08 PM
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Thanks for sharing your knowledge guys. I'll definitly take your advise!
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