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Deputy National Director
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10,514 Posts
Discussion Starter · #1 ·
What is the size of the tranny lines to the radiator on a 84 th350C ? 3/8 OD or 5/16 OD ?
Thanks !! :beer:
 

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TrannyMike
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2,807 Posts
They are 5/16 stock. As were ALL RWD GM screw in lines. Roy, that's not very common. The fittings at the end of the lines are a 1/2 hex. To have 3/8 lines you'd have to be running a 9/16 or 5/8 hex. Is that what you have? :beer:
 
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