Trans Cooler Lines - The 1947 - Present Chevrolet & GMC Truck Message Board Network

orange72350 · 11-11-2003, 11:05 PM

Pulled the engine and trans on the 72 gmc, but busted up the old metal tranny cooler lines when i took them out. got new rubber ones made, but i cant seem to remember which line goes where. as far as i remember, the bottom line from the trans goes to the bottom fitting in the cooler. i think. will it matter if they are backward? thanx guyz. btw, does my rad have 2 be grounded now that i have rubber lines? i heard someone say that the flow of the atf causes a charge to build. is that correct? thanx for the help
btw its a turbo 350
dale

Longhorn Man · 11-12-2003, 01:09 AM

It does not matter one bit on line location, the oil is cooled by the coolant, not water, so there is literally no point in sweating it.
I would not run the rbber lines very long...that is a 'good enough for now' fix. Running lines is easy enough and pretty cheap if you do it yourself.
Grounding the rad wouldn't be a bad idea. Just don't ruin a screw through the tanks...you'll kinda regret it.

orange72350 · 11-12-2003, 02:36 AM

how come rubber lines are a get by for now fix? i just figured that would be good cause all the trucks i work on(highway trucks) have hydralic hose for rad coolers. i shoulda said the lines were hydralic lines, not rubber. these lines better hold up, they cost me 60 dollars to build. where is the best place 2 drill the rad to ground it? thanx
dale

Longhorn Man · 11-12-2003, 02:41 AM

OK...I was thinking you did the 'ole 3/8 fuel line. My bad.

I have no idea where to do the ground strap. NFC.

orange72350 · 11-12-2003, 02:52 AM

kewl kewl. thanx longhorn man. so what yer saying is that if i take the hose that is hooked in to the bottom port on the tranny i can run it to either fitting on the cooler? btw, what cuase the atf to run up them lines? is it just pressure from th tranny, or is there a pump? thanx
dale

mrein3 · 11-12-2003, 09:58 AM

Quote:

Originally posted by Longhorn Man
It does not matter one bit on line location, the oil is cooled by the coolant, not water, so there is literally no point in sweating it.
I would not run the rbber lines very long...that is a 'good enough for now' fix. Running lines is easy enough and pretty cheap if you do it yourself.
Grounding the rad wouldn't be a bad idea. Just don't ruin a screw through the tanks...you'll kinda regret it.

I bought an external cooler from Summit. I think it is a flex-a-lite brand. I used the rubber lines THEY supplied in the box it came in to plumb it into my system. Just two months later I was pulling my boat to work to fish an evening tournament later that evening when one of those hoses developed a leak. Believe me it doesn't take long to pump two quarts of tranny fluid all over your engine compartment, underside of the truck, and boat from a pin-hole sized leak.

I used better quality rubber line to get me through the summer and have since replaced that with metal tubing I bent myself.

My lines from the tranny to the radiator are from in-line tube.

Don't go cheap on your lines. (This is obviously for folks following this thread, not you orange72350)

Longhorn Man · 11-13-2003, 01:09 AM

The tranny has a pump in it that produces quite a bit of pressure. As far as I know (and I am in no way any kind of tranny guy) there is no other pump in there.

11-11-2003, 11:05 PM	#1
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	Trans Cooler Lines Pulled the engine and trans on the 72 gmc, but busted up the old metal tranny cooler lines when i took them out. got new rubber ones made, but i cant seem to remember which line goes where. as far as i remember, the bottom line from the trans goes to the bottom fitting in the cooler. i think. will it matter if they are backward? thanx guyz. btw, does my rad have 2 be grounded now that i have rubber lines? i heard someone say that the flow of the atf causes a charge to build. is that correct? thanx for the help btw its a turbo 350 dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

11-12-2003, 02:36 AM	#3
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	how come rubber lines are a get by for now fix? i just figured that would be good cause all the trucks i work on(highway trucks) have hydralic hose for rad coolers. i shoulda said the lines were hydralic lines, not rubber. these lines better hold up, they cost me 60 dollars to build. where is the best place 2 drill the rad to ground it? thanx dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

11-12-2003, 02:52 AM	#5
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	kewl kewl. thanx longhorn man. so what yer saying is that if i take the hose that is hooked in to the bottom port on the tranny i can run it to either fitting on the cooler? btw, what cuase the atf to run up them lines? is it just pressure from th tranny, or is there a pump? thanx dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

11-12-2003, 01:09 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	It does not matter one bit on line location, the oil is cooled by the coolant, not water, so there is literally no point in sweating it. I would not run the rbber lines very long...that is a 'good enough for now' fix. Running lines is easy enough and pretty cheap if you do it yourself. Grounding the rad wouldn't be a bad idea. Just don't ruin a screw through the tanks...you'll kinda regret it.

11-12-2003, 02:41 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	OK...I was thinking you did the 'ole 3/8 fuel line. My bad. I have no idea where to do the ground strap. NFC.

11-13-2003, 01:09 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The tranny has a pump in it that produces quite a bit of pressure. As far as I know (and I am in no way any kind of tranny guy) there is no other pump in there.



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