LCPLPunk

Hey guys,

So I have new tranny fluid on the way and I'd like to install a transmission cooler during the fluid swap. I have two Hayden coolers (one that was going on another vehicle, but didn't end up using it) and so I basically have two of these (I'm only going to use one of the coolers):



My question is, can I use the metal flare fittings (the thing with the copper on it) to screw into the tranny and radiator? I think they might be 5/8" barb fittings.

I was going to just cut the tranny lines and splice into it with the rubber hose, but then I would want to flare the lines to ensure the hose stayed on.

Should I attempt to get the metal fittings to screw into the tranny/radiator, or just cut and then flare the tranny lines?

THE 383 admiral

you already have the cooler now. I would have purchased a Trans cooler with threaded fittings along with Aluminum line. You are forced to clamp on a hose onto your barbed Trans cooler fittings.

92ragtop

If you flare the end of the lines, you'll end up with an edge that could eventually rub through the rubber hose. If you use a compression fitting on the hard line, that won't happen. Also, make sure that you use proper transmission fluid hose, NOT regular rubber.

LCPLPunk

Ok, so don't flare the lines after I cut them?

I can just cut the tranny lines and then plug in the cooler with the attached hose/clamps?

I'm thinking I'm going to use the more industrial clamps and not just use the regular ones that came in the kit.

gerardvg

Yes just cut the line, I usually use sandpaper first before cutting the line. that gives the hose extra grip, have never had a trans cooler hose come off with good quality hose clamps.

I prefer using tube cutters to a hacksaw, but that is personal preference to keep any metal filings out of the transmission.

LCPLPunk

Love the sandpaper idea, thanks!

92ragtop

If you use hose clamps, slip the rubber line further down on the metal line, and use 2 clamps per fitting, just to ensure no leaks or slippage.

There are differing opinions on this, but IMHO I think it makes more sense to splice the additional cooler into the return line, meaning that the trans fluid has already been through the cooler in the rad.

THE 383 admiral

when, I did use rubber lines. I never experience a flared line. Rub through the Hose. If the hose is clamped. Why would the hose rub through???? Not much different from barbed.

LCPLPunk

I'm gonna do return side and thanks for the advice! I think I'll use the hose clamps and maybe even one of the kinds used for the radiator hoses just to make sure nothing comes off.

bullguts

i just did mine and bought it in kit form and you don't need to cut the lines at all . you get screw on connections , and the lines are soft and pliable enough to bend with your hands .The tricky part is not poking a hole in the condenser when you fit the cooler in front of it . It is actually a big job because of the room issue and getting in there to do it , you have to take off a lot of stuff as you will soon find out . Cheers

LCPLPunk

What kit are you running?

bullguts

got the kit from ecklers , but if you only need the connections , just go to a speed shop , should help you out . Cheers

LCPLPunk

Do you remember the sizes of the fittings you got?

bullguts

no i don't , but i'm sure that your regular speed shop would be onto it .