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Old 10-22-2020, 12:43 AM   #1
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Default Trans cooler fitting size on stock radiator

Does anyone know what size the trans cooler fitting on the radiator is? I thought it was a 5/16 quick disconnect but I was wrong. Also tried a 3/8 for ships and giggles but was wrong again. Iím building lines and canít find the correct fitting to connect the lines to the radiator
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Old 10-22-2020, 02:48 AM   #2
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Thought the connections were barb fittings?
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Old 10-23-2020, 02:23 AM   #3
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I have no clue, but being a Japanese truck, I can guess why 5/16 and 3/8 didn't work.

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Old 10-23-2020, 08:27 PM   #4
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i had a very similar problem on my accord. if youre going to use the crush-fittings (furelle? how the hell do you spell that?) and go to a braided-stainless with an -AN fitting, thers one thats realllllly close to the point i thought the crush fitting would suck up the difference.

I wound up chickening out and using normal rubber-ish trans cooler lines. I did wonder what brand import tuners use to make these or if they just know theres enough slack in the imperial measurements to make it work for metric
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Old 10-23-2020, 09:27 PM   #5
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FWIW I have replaced the trans cooler lines on several Toyota vehicles over the years and have always used 3/8" transmission cooler hose. It works fine with the stock fittings but since the OD of the aftermarket hose is slightly smaller the factory spring type hose clamps won't work.
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