Changed both transmission lines. The top one has a healthy leak from the nut that screws down over the flared part of the line. The brass fitting attached to the radiator does not appear to be producing or adding to the leak.

I've undone the line fitting a couple of times, cleaned it off, and re-attached, thinking I had poorly positioned it. The brass nipple does not look to be compromised at all. Research has turned up the ideas of putting some teflon tape or liquid teflon sealant in the nut attached to the trans line in order to seal up the leak. Alternatively, is there a potential o-ring solution?
ARE ANY OF THESE ADVISABLE?

I don't prefer to do the "fix" by removing that hardline and using a rubber line if I can avoid it. PO did that to the bottom line (leading to my original leak at bottom line and decision to just switch both lines out)
WILDCARD: I never had a prob with the original top line, although I noticed it started a slow drip after cooling system work during which I did not remove the radiator, but displaced it a bit during the work I was doing. However, I have no indication that I didn't properly adjust the radiator's position before closing everything up (and I drove without incident since, save for the tranny line leaks). Again, it does not look like I messed up the radiator's brass fitting. But, I have been accused of being hard on the equipment
ALSO, as I was refilling trans fluid after putting new lines in, I suspect some air got in because of a couple burps then a really slow drain on the last funnel full going into the dipstick tube. Could I have a needs-to-be-burped issue (doesn't make logical sense to me b/c it is the TOP line leaking)

Sorry, not very succinct, was hoping any/all info might spark an idea from someone. Back on task though, teflon fix? O-ring of some type?

THANKS for any input, I'm dying to drive my xj again

 

Teflon tape won't do it, seal is at the flare.

 

How about a liquid product around the threads of the brass nipple? Seems that might help seal it? thanks btw

 

Check the fitting & line for crack or serious defect. Are they the same angle?

 

Just checked them again. Line looks fine and flare part appears to be uniform/without defect (FWIW, it's all new, although I know that's not always dispositive). The nut looks good too. I don't know how much "play" there should be with respect to the nut's circumference around the line (seems like it could be snugger - slides up and down line without any resistance or assistance).

During both do-overs, I was careful to hold the line at an angle for full contact between the fare and nipple until I had the nut tightened down on it. I would be shy to crank the nut any tighter for fear of over-tightening.

 

http://www.globalfluid.com/p4400_pdf/G12.PDF

Hopefully the correct torque will fix it for ya, I gotta go play with the leaf blower.

 

Might be silly, but I just pressed the flare against the nipple with a piece of paper between. The resulting indent suggests that one side of the flare has a "better" fit against the nipple than the other side of the flare, but it doesn't look like they don't otherwise line up against each other

 

Thanks! Enjoy haha

 

Return that tube as defective. Get another one in exchange.

During fabrication, someone didn't flare the tube properly.

Good test you did BTW.

 

Thanks Ken, will do. Now I can focus the neurosis on whether I'll fubar the quick disconnect into which that piece is attached. haha

 

If the tube/quick disconnect is new and you use the proper disconnect tool, it should come apart easily. If one or both of these two elements don't exist, Say Good Night Gracie. ;-)

 

You realize you just dated yourself, don't you Ken?

You and Cruiser are probably the only guys on this board that remember vaudeville!

 

George Burns & Gracie Allen.

The family used to listen to them on the radio before TV.

That was Geoge's sign-off for the night.

There's many old radio programs that I liked; some made it to TV, others didn't. Terry and the Pirates was a good one, so was The Shadow.

 

I no longer feel old, thx.

 

Not wanting to disappoint, gingerly disconnecting the new parts is indeed Gracie's present struggle. Getting the desired click but not desired disconnect. NOT whining- I know my struggle's not unique but...