what type of fittings for a trans cooling line on a 2004r

DarkoStoj

DarkoStoj

A mysterious figure named Darko
i got a 2004r from ridings and I want to order all the fittings I need to plumb it to the cooler in my radiator. -4 standard braided line gonna be ok? What fittings do I need that screw into the side of the trans?
 
-1/4 npt on the case side is pretty standard for GM transmissions of that vintage. I'd plumb with -6 for better cooling performance.
 
The orginial thread is 1/4 straight pipe. You can install a 1/4 npt to #6 fitting, just dont remove it once its in. Use thread sealer or tape, and tighten by hand. Over tighten it using a 1/4npt will crack the case.
 
Detroit Gearbox said:
The orginial thread is 1/4 straight pipe. You can install a 1/4 npt to #6 fitting, just dont remove it once its in. Use thread sealer or tape, and tighten by hand. Over tighten it using a 1/4npt will crack the case.
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My 4l80e has a special fitting in the back thats a little longer. It sticks in the case a bit. do they make anything to replace these?
 
DarkoStoj said:
so is it best to just use a 1/4 straight pipe fitting to a -6?
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Yeah. When I did my tranny cooler lines I had them made up at a hydraulic shop. I think I had $60 in both lines. Ask for JIC fittings which are steel versions of AN. The outer jacket of the line has held up very well on my pickup..

cjmatt said:
My 4l80e has a special fitting in the back thats a little longer. It sticks in the case a bit. do they make anything to replace these?
Click to expand...

When I get back to my laptop I'll drop you a note. I had a solution for this a few years back...
 
cjmatt said:
My 4l80e has a special fitting in the back thats a little longer. It sticks in the case a bit. do they make anything to replace these?
Click to expand...

The fitting you have has a short tube attached that seals to the center support. There are three fittings available. One is a quick connect, the other two has either 5/16 or 3/8 female line fitting.
 
alright i ordered some straight 1/4 to -6 fittings with power steering fluid compatible blue/braided lines & fittings.
 
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