Hoses/lines for tranny and cooler

[Andreas]

I think I read the other day about not running no steelbraided hoses for tranny (cant find the thread). But if the rubber hose has the same preassure class like the steelbraided hose wouldnt that work? But I guess non steel braided hose expands a little and makes line preassure lower? Is that the reason? So, is non steelbraided hoses a big no?

 

[nightdiver]

Re: Hoses/lines for tranny and cooler

The oil cooler circuit has low pressure

 

[Crimson93Ty]

Re: Hoses/lines for tranny and cooler

The pressure on the outlet coming off the trans going to the cooler will be close to what your torque converter's internal pressure is. I saw something somewhere about using lines made specifically for running trans fluid. I'm sure fuel line would work as well. I'll have to look it up now. There was some kind of rubber hose that transmission fluid would actually break down and send pieces of rubber into the system.

 

[Andreas]

Re: Hoses/lines for tranny and cooler

THAT I would like to avoid...fresh tranny and brand new TC...would like to avoid more troubles with driveline for a while.
I've been talking to a Hydraulic hose company today and gone pay them a visit on monday. Gone see what they have in store.

 

[nightdiver]

Re: Hoses/lines for tranny and cooler

The pressure on the outlet coming off the trans going to the cooler will be close to what your torque converter's internal pressure is. I saw something somewhere about using lines made specifically for running trans fluid. I'm sure fuel line would work as well. I'll have to look it up now. There was some kind of rubber hose that transmission fluid would actually break down and send pieces of rubber into the system.

Are you 100% sure ? i mean what kind of cooler or filter(external) would hold with a pressure rated over 150 psi ?
I m sure that that line has lower pressure but ti have to find where i read it. I think it was in the GM manual 3-4 years ago

 

[myclone]

Re: Hoses/lines for tranny and cooler

If you use hydraulic rubber lines you'll be fine (they cost more though). Hydraulics regularly run 2000 to 3500psi and if your trans puts out that much pressure then you have other problems that will be way more disasterous on your hands than a blown line.

Braided lines are fine too depending on which style you use. There are different styles of braided line that may be taxed by the pressures in the cooling circuit but the big concern is that they are compatible with trans fluid. Trans fluid likes to eat rubber over time so just be sure if you use braided lines they are compatible with trans fluid (theres a reason the factory lines are metal ).

 

[mrweelr]

Re: Hoses/lines for tranny and cooler

Well, I hope the Summit 6AN braided hose is acceptible for complete replacement of the factory metal lines or I'm going to be one unhappy camper...

Has anyone else chucked the stock metal lines and routed everything with braided 6AN? I'm still looking for the adaptors/fittings to convert the aux filter mount inlet/outlet to 6AN male if anyone has any ideas. Couldn't find anything from Earl's. Summit notes the threads on the aux filter mount are 3/4-16 in., anyone know how to adapt those fittings to 6AN?

 

[kwick6]

Re: Hoses/lines for tranny and cooler

Well, I hope the Summit 6AN braided hose is acceptible for complete replacement of the factory metal lines or I'm going to be one unhappy camper...

Has anyone else chucked the stock metal lines and routed everything with braided 6AN? I'm still looking for the adaptors/fittings to convert the aux filter mount inlet/outlet to 6AN male if anyone has any ideas. Couldn't find anything from Earl's. Summit notes the threads on the aux filter mount are 3/4-16 in., anyone know how to adapt those fittings to 6AN?

For the remote filter you want (2) EAR-981606 which is a -6an to 1/4npt straight. Then you'll need two more of the EAR-800106 -6an hose ends. You could also use 90's on the filter depending on where your mounting your filter. The 3/4-16" is in reference to the threads that the filter attaches to. Keep in mind that you will need a good amount of room to make the bends to the filter if you use straights. Heres a pic to help explain what I'm talking about.....pay no attention to that K&N filter

http://syty.huryde.com/gallery/Transmission/DSCN1035

All of my lines for the trans are in -6an , and I used the summit braided hose as well.

Just make sure that when you route the lines that you have them flowing through the filter in the right direction , or you will be in bad shape. We even went so far as to take a line off the filter and put it into a plastic 20oz. bottle and started up the truck and in about 2 secs it was about half full. The flow with the -6an lines is excellent.

One more thing.... Be careful to not overtighten the fittings on that external filter housing. The housing is aluminum and it will easily strip and leak if you try to overtighten the fittings to stop a leak.

 

[nightdiver]

Re: Hoses/lines for tranny and cooler

Well i was using for the past 2 years just a high temp rubber line with a couple clamps at the fittings.No problem at all.
When i removed the coolers at the front (i had them under the bed) i made the lines like they were before (metal). The reason is that i didnt trust rubber next to the crossover.
Fact is that the these lines have LOW PRESSURE. They wouldnt supply hose clamps to use for this circuit if it had high pressure.

 

[kwick6]

Re: Hoses/lines for tranny and cooler

Well i was using for the past 2 years just a high temp rubber line with a couple clamps at the fittings.No problem at all.
When i removed the coolers at the front (i had them under the bed) i made the lines like they were before (metal). The reason is that i didnt trust rubber next to the crossover.
Fact is that the these lines have LOW PRESSURE. They wouldnt supply hose clamps to use for this circuit if it had high pressure.

Yes, I've been thinking about this since I installed them. I will have to come up with something to deal with this heat at the crossover, the lines are very close.

 

[mrweelr]

Re: Hoses/lines for tranny and cooler

Hey Scott, thanks for providing the fitting specs and pic for the aux filter mount w/braided lines...that's exactly what I was looking for I've got Thermo-Sleeve and a bunch of other heat tape stuff I will wrap around the braided lines where they flow near the downpipe and/or crossover. Now I have everything I need to put the trans in. Just need to borrow an engine hoist to install the solid motor mounts. Will post pics of the whole setup as I progress.

 

[mrweelr]

Re: Hoses/lines for tranny and cooler

OK, I just ordered the (2) EAR-981606 Earl's fittings for the remote filter mount, got everything to plumb up this bad-ass cooling setup. BTW, I've now ordered a remote filter kit from Derale, Summit, and now Jeg's and NONE of them come with the threaded hole in the center for the temp sending unit...very frustrating. Jeg's is going to contact Perma-Cool on Monday for me and figure out what the deal is. The picture on the damn box even shows a brass plug in the center but that's not what's in the box.

Anyway, dumb question...but I want to make sure I route these lines correctly. Does this sound right:

Tranny top port --> Remote filter --> Derale 13700 Cooler --> Factory Rad Cooler (top port) --> Factory Rad Cooler (bottom port) --> B&M 70266 Cooler --> Tranny bottom port

Everything will be plumbed with 6AN braided line. Does this all flow correctly? The Derale w/fan and aux filter will be under the bed somewhere. I'm mostly just concerned about getting all of the hoses connected to the right places.

 

[Crimson93Ty]

Re: Hoses/lines for tranny and cooler

If the lines were under such low pressure, people wouldn't have them blowing off all the time. At idle, the pressures are lower. That's why you can check fluid flow without it blowing across the shop. As throttle position increases, pressures increase of course. So at WOT, lines get blown off because of the high pressures. I've known several people blow lines off. The pressure drops as it leaves the outlet of the trans but the pressure at the point of exit is pretty close to what you have in your converter. The larger the lines and cooler setup, the less backpressure on the converter. Why do you think GM went to locking transmission dipsticks? People were blowing them completely out of the trans and spraying everything with trans fluid. Albeit that this is from a problem at that point but low pressure wouldn't do that.

 

[Andreas]

Re: Hoses/lines for tranny and cooler

http://www.syty.net/forums/showthread.php?t=11264

 

[mrweelr]

Re: Hoses/lines for tranny and cooler

I blew a barbed connection off at the radiator under 18 psi of boost on the freeway onramp. It was the top port on the radiator, which I'm assuming is the high-pressure one. After that mess left me stranded and the 2 or 3 hours it took to hose down and clean the truck, I won't take a chance again - threaded fittings all the way with the new trans and coolers.