beavertail

I have a 47RE and 97 2500. The spacers that keep the line separated vibrated to the wrong spots. I don't really know how that happened. Anyway, after noticing a big puddle of tranny fluid under the truck this morning I founf that the lines rubbing against each other finally wore through. the way this is designed, it has to be a common problem.

The hole was too close to a bend to patch so I've order the line. It's the line that comes from the heat exchanger, so I guess it's the input line. Now for the question.

I'm pretty familiar with compression fittings. But after taking the line off, there is still a half of the brass compression fitting screwd into the side of the tranny. It's really hard to get to. I've tried taking it out and it's a real pain, hard to get and I think Andre the Giant put it in cause I can't get it to budge. Of course I am working with a shorty wrench cause it't the only thing that would fit in there.

Do I need to take this out or does it work with the new line? It's the brass female end, the flared tubing goes into it and then the other nut screws into that.

Any other tips for this procedure would be greatly appreciated.

rebal

it should bolt up with the new lines.

infidel

Easier/cheaper to just cut the bad portion of the line out and slip snug fitting hose over each end and hose clamp it.
Hose only needs to be resistant to heat and oil, not high pressure.
Pressure in the cooling lines in usually only 10-15 psi.

turfguy

so do both lines have low pressure, bill? my 95 2wd needed the 2 longest tranny lines replaced; & was told to NOT use compression fittings & such (because of the pressure) by a reputable tranny shop.....

infidel

The pressure is basically just the flow resistance in the cooling system.
Fluid is pumped though the cooling system then back to the pan where the pressure is 0.

beavertail

Thanks for the info guys. I tried to patch it by compression fitttings but the line was so flat spotted it wouldn't flare. Plus it was to close to a bend.

I read that stock line pressures on the tranny lines are around 52 lbs.

After a lot of research and calls to the different dealers I found that Rock Auto has the replacement line for $40. The dealer had it for $139. Rock Auto's was definitely a Made In China cheapo. The 3" hose part was a lot thinner and I had to hold it to keep it from twisting shut as I screwed the nut onto the Torque Conv. Cooler. Plus the flares and nuts seem to be cheaper it just doesn't have that heavy feel to it. But it went in and fit great. So far so good.

13FOX

Can use hydraulic lines as well. I did when I relocated the heat exchanged behind the front bumper. No problems and dont have to worry about future leaks either.

blackimpala

Infidel is right, there is very little pressure in the cooling lines. I replaced one years ago with NAPA transmission hose. No leaks yet.

Floyd

cj360trider

Whats is the minimum inside diameter recommended for cooler lines? 1/2"? or bigger

infidel

Napa now also carries the tranny lines and fittings for half the dealer price.
They may not have them in stock but you'll get them fast.
Read> http://www.cumminsforum.com/forum/94...placement.html

kujo

mine has rubber hose in a few places, double clamped at each end.. no leaks

Midnite

Yep, 1/2" because of the low pressure previously mentioned. If you go with 3/8" you end up reducing flow and consequently reduce cooling.

justme-

FWIW Classic tube used my lines to master a CAD set in SS this fall for mine... cost around $250 and they fit pretty well.

Talked to my tranny guy about hydraulic hose as a replacement and he was not fond of the idea.