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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

C6 Cooler Fitting FYI

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Old Dec 5, 2007 | 04:35 AM
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ozstang65
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C6 Cooler Fitting FYI

Hi everyone,

I am currently rebuilding an Aussie '82 F100 with a factory 351C and C6 auto. I'm replacing the factory hard lines with 3/8 (-6AN) lines and fittings and needed to replace the C6 cooler line fittings at the gearbox. I searched high and low for the gearbox fitting size but couldn't locate anything except the factory line size (which is 5/16 with an inverted flare fitting at the gearbox end).
Eventually (by measuring the fitting when I removed it) I found out that the thread size for the fittings in the gearbox are 1/8 NPT (female). So for anyone else looking for the C6 gearbox cooler line fitting size, there it is.

I replaced the factory fitting with a 1/8 NPT to -6AN fitting to allow me to install -6AN line and fittings (including a thermostat, cooler and filter).

Hopefully one day (when I get the time) I'll be able to post a description and pics of the upgrade.

 
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