Trans cooler lines, which is IN and which is OUT?

VinnieGTP · 08-03-2008, 12:43 PM

I have been searching all morning and I cant find this info.

The trans side is what I'm looking for.

Thank you.

Trannyman95 · 08-03-2008, 01:43 PM

The fitting that points straight DOWN is the outlet-hot fluid which needs to go into the cooler. The fitting that points horizontally into the trans-closest to the pan- is the return line which uses the cooled fluid to direct to lube passages in the geartrain.

VinnieGTP · 08-03-2008, 05:56 PM

I was hoping you would reply. Thanks for the info!

VinnieGTP · 08-03-2008, 07:10 PM

Next question. Is there any reason why I can't remove the stock lines from the fittings on the trans and go straight AN lines to and from the stock and aftermarket cooler?

It looks like 2 3/8 NPT fittings going into the trans. I know the stock cooler is 3/8 also.

SyntheticShield · 08-03-2008, 11:16 PM

Ahhh, we think alike Vinnie, but alas, as I believe Trannyman will confirm, there are check balls in those fittings on the transmission that have to be maintained. I too would like to do AN lines all the way but that put a damper in that idea.

VinnieGTP · 08-04-2008, 12:25 AM

Crap, they are on the tranny end of the stock lines?

SyntheticShield · 08-04-2008, 06:30 AM

Not in the stock line, in the fittings themselves where the stock lines connect to.

TDCRacing · 08-04-2008, 10:54 AM

Darn, so it looks like you would have to retian the stock fittings and do like a tube to AN connector or just flare it.And then run hose the rest of the way.

VinnieGTP · 08-04-2008, 11:39 AM

Thats exactly what I'm doing now

Unless a non-quick fitting trans is different.

SyntheticShield · 08-04-2008, 11:59 AM

My plan was to just use enough hard line to hook up an AN fitting to make it look like the AN fitting was connected somehow to the quick connect/disconnect fitting and then run it from there.

08-03-2008, 12:43 PM	#1
VinnieGTP GTX Level Member Join Date: Jan 2008 Location: Dayton, OH Posts: 604 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	Trans cooler lines, which is IN and which is OUT? I have been searching all morning and I cant find this info. The trans side is what I'm looking for. Thank you. __________________ 2008 Greater Ohio Club Grand Prix President My Mod List

08-03-2008, 01:43 PM	#2
Trannyman95 Transmission Expert Join Date: Dec 2007 Location: Fort Wayne, IN Posts: 1,275 Thanks: 0 Thanked 23 Times in 21 Posts iTrader: (3)	Re: Trans cooler lines, which is IN and which is OUT? The fitting that points straight DOWN is the outlet-hot fluid which needs to go into the cooler. The fitting that points horizontally into the trans-closest to the pan- is the return line which uses the cooled fluid to direct to lube passages in the geartrain. __________________ www.TripleEdgePerformance.com 4T65E Transmission Info Voted GPF.net Community Hero

08-03-2008, 05:56 PM	#3
VinnieGTP GTX Level Member Join Date: Jan 2008 Location: Dayton, OH Posts: 604 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	Re: Trans cooler lines, which is IN and which is OUT? I was hoping you would reply. Thanks for the info! __________________ 2008 Greater Ohio Club Grand Prix President My Mod List

08-03-2008, 07:10 PM	#4
VinnieGTP GTX Level Member Join Date: Jan 2008 Location: Dayton, OH Posts: 604 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	Re: Trans cooler lines, which is IN and which is OUT? Next question. Is there any reason why I can't remove the stock lines from the fittings on the trans and go straight AN lines to and from the stock and aftermarket cooler? It looks like 2 3/8 NPT fittings going into the trans. I know the stock cooler is 3/8 also. __________________ 2008 Greater Ohio Club Grand Prix President My Mod List

08-03-2008, 11:16 PM	#5
SyntheticShield Administrator Join Date: Dec 2007 Location: Oklahoma Posts: 6,757 Thanks: 15 Thanked 52 Times in 37 Posts iTrader: (5)	Re: Trans cooler lines, which is IN and which is OUT? Ahhh, we think alike Vinnie, but alas, as I believe Trannyman will confirm, there are check balls in those fittings on the transmission that have to be maintained. I too would like to do AN lines all the way but that put a damper in that idea. __________________ Scotty Hall Bartlesville, OK 2001 Pontiac Grand Prix GTP It whines a lot, but I like it. The only limitation you will ever face in life is yourself!

08-04-2008, 12:25 AM	#6
VinnieGTP GTX Level Member Join Date: Jan 2008 Location: Dayton, OH Posts: 604 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	Re: Trans cooler lines, which is IN and which is OUT? Crap, they are on the tranny end of the stock lines? __________________ 2008 Greater Ohio Club Grand Prix President My Mod List

08-04-2008, 06:30 AM	#7
SyntheticShield Administrator Join Date: Dec 2007 Location: Oklahoma Posts: 6,757 Thanks: 15 Thanked 52 Times in 37 Posts iTrader: (5)	Re: Trans cooler lines, which is IN and which is OUT? Not in the stock line, in the fittings themselves where the stock lines connect to. __________________ Scotty Hall Bartlesville, OK 2001 Pontiac Grand Prix GTP It whines a lot, but I like it. The only limitation you will ever face in life is yourself!

08-04-2008, 10:54 AM	#8
TDCRacing Community Vendor Join Date: Jan 2008 Location: WarnerRobins,GA Posts: 2,828 Thanks: 6 Thanked 19 Times in 19 Posts iTrader: (11)	Re: Trans cooler lines, which is IN and which is OUT? Darn, so it looks like you would have to retian the stock fittings and do like a tube to AN connector or just flare it.And then run hose the rest of the way. __________________ 1999 Silver GTP~HP Tuners~XP cam~ZZP FS Intercooler~#4 FMHE~ZZP 78mm Billet Throttlebody~LQ4 MAF~Lucas 42.5's~ZZP SS Headers~2.8 MPS~PRJ fuel logs~Ported & Polished S/C~TDCRacing FWI ~Built Tranny-3.29's-7/8's chain-Intense forged Input Shaft~ 12.71 @ 107 / 1.9 60' / .401 r/t/ Lot's of excuses Get you're TDCRacing Fenderwell Intake Today!

08-04-2008, 11:39 AM	#9
VinnieGTP GTX Level Member Join Date: Jan 2008 Location: Dayton, OH Posts: 604 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	Re: Trans cooler lines, which is IN and which is OUT? Thats exactly what I'm doing now Unless a non-quick fitting trans is different. __________________ 2008 Greater Ohio Club Grand Prix President My Mod List

08-04-2008, 11:59 AM	#10
SyntheticShield Administrator Join Date: Dec 2007 Location: Oklahoma Posts: 6,757 Thanks: 15 Thanked 52 Times in 37 Posts iTrader: (5)	Re: Trans cooler lines, which is IN and which is OUT? My plan was to just use enough hard line to hook up an AN fitting to make it look like the AN fitting was connected somehow to the quick connect/disconnect fitting and then run it from there. __________________ Scotty Hall Bartlesville, OK 2001 Pontiac Grand Prix GTP It whines a lot, but I like it. The only limitation you will ever face in life is yourself!

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