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Fitting adapter size needed for trans lines on f-body radiator?

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d0n_3d

Boost is good.
Joined
Jul 14, 2001
Messages
4,740
I'm wanting to adapt the two hard line transmission cooler lines to the f-body radiator and don't know what size fittings I need. Are the compression fittings on the lines 3/16"? Anyone know off the top of their head what size goes into the female ports on the radiator? Thanks.
 
There are no compression fittings on the stock Buick transmission or oil coolers.

The hard lines are 5/16" inverted flared tube standard tubing type available at the parts stores in the racks.

The Buick short radiator hard lines go into a right angle fitting in the front of the stock radiator which is a 1/8" NPT into the radiator male, and a female to accept the short tranny lines. The long hard transmission lines couple to the short hard lines via a couple of 5/16" straight female to female adapter fittings.

I think that describes them properly.
 
Thanks, the trans lines are indeed 5/16" inverted flare. The f-body radiator has the same thread. I just made extensions and all is well now.
 
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