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SS transmission cooler line fittings

14K views 12 replies 7 participants last post by  hatzie 
#1 · (Edited)
Hi, My 2007 Impala SS has a leaking transmission cooler line. It's leaking at the quick-connect at the tranny. I just picked up some parts at the dealer, and there's some confusion about which connector goes where. The drawing shows the short connector going into the horizontal opening while the longer connector is in the vertical position.

But on my car, as I recall, the long one was inserted into the horizontal position. (I'll double check that when I get home tonight.) In the mean time, I've analyzed the two fittings, and they appear to have the same threads AND the same size openings, so it seems possible that they could be swapped.

The dealer had the tranny out last year - maybe the tech got them swapped? Anyway, I know on my gen7's (3.4) the lines at the radiator are different sizes - you can't accidentally swap them on that end - not sure about the tranny end.

Can someone please tell me what you see on your SS (ie, on your 4T65E-HD)? Long=horizontal or vertical? Short=vertical or horizontal?

Also, the long connector is filled with some sort of clear lube. Am I supposed to clean that out before inserting it? Or does it dissolve in the tranny fluid?

Lastly, here are the GM (and ACDelco) part numbers for these fittings.
Short: 24236554
Long: 24236555

If someone can confirm the positions of these, I would greatly appreciate it. Thanks.

Doug

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#3 · (Edited)
Thanks for your reply, 463. Believe it or not, I had already found that video


I got the new part in tonight, and it has fixed the leak.

I mis-remembered it from yesterday. I'd'a sworn I saw the long one in horizontally yesterday, but it was indeed the short one in that spot. (My dealer had not swapped them.)

This is one of the easier repairs on this car. I put a radiator in the other day, and it was a PITA. The driver's side fan broke and took the radiator with it


In the process, I realized the tranny cooler line was leaking...pretty fast, I should add, so I'm glad I was able to get it fixed - I can cross that off my worry list now


Doug

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#8 ·
Hey plano-doug wanted to know was this the line you referring too? took this pic when i go my rack done. looked under seen oil seepage and that line i see reddish liquid coming from fitting not leaking bad just moist.
Yes, that is one of the two lines in and out of the transmission.

If you see red, then you have a leak. It may be small and slow, but, if you see fluid, it's leaking from somewhere. I swapped the fitting, and now my leak is gone.

Doug

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#12 ·
Earl's trans fitting modification 07 Impala SS

GUY's, I'm new to this forum.I want to share something that I've done to my Impala SS. I had the same quick disconnect leak at the transmission. I ended up buying two Earl's #361-785066 , 9/16-18 thread end x 3/8 barbed opposite end. So the new fitting thread into the transmission like the OEM did but now you can cut the factory 3/8 tubing end's off to the determined length you need and use 3/8 fuel injection hose with fuel injection 3/8 clamps to connect the cut end to the new 3/8 barbed end that is now attached to the trans. The one thing I did add was an inline Magnafine 3/8 filter to the return line (bottom)just above the trans pan and a 10 oz bottle of LubeGard red. I use the filter as a safe guard to help keep clutch fiber and furrus metals from traveling throughout the transmission. An added note , I have 2002 Honda Odyssey with the dreaded trans that was a problem for Honda. I put a inline Magnafine filter on the return line and use the factory OEM Honda transmission fluid with a 10 oz bottle of lubegard red. I started this when the Honda had 35k on it. It now has 205k and still shifts as when it was new. I also change the transmission fluid at every engine oil change which is 4-6k. I use synthetic motor oil in all my cars too

Mark
 
#13 · (Edited)
Lots of auto parts goons will sell you Fuel hose for transmission and power steering line. Fuel Injection hose is problematic with transmission fluid. The pressure and heat specs are usually not up to the task. SAE J30R9 is only rated for max 275°F and 100PSI operating pressure. You can get away with it for a while but it's really not good for long term use.

The hose engineered for automatic transmission fluid coolers will be labeled SAE J1019 with minimum spec max operating temp of 302°F and max pressure of 217PSI. Gates sells a version that's good to 250PSI

Magnefine filters are well worth the effort. They're a real 25 micron filter with a magnet to pick up finer iron particles. The pickup strainer on automatic transmissions is barely more than a fine screen.
 
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