rusty250

hey guys do u know where i can get replacement transmission oil cooler lines? mine r leakin pretty good, so im stuck without my truck for a bit. its a a727 tranny.

Thanks

Jim5870

I've seen hydraulic hoses and fittings substituted for bent steel lines.

93 12v

Yeah I gotta fix mine too, it's not leaking , yet. It's chafing on the radiator drain. Regular hydraulic hoses should do right?

JustRamIt91

yes make sure you get 1/2 in lines, then use 2 worm clamps or 1 big one if you have them. I had custom hydrolic lines made up for me at work. They also had the nice 1/2" wide worm clamps and that fixed all my leaks :-)
Good Luck.
Degrease you engine after you fix the leaks, trans fluid isn't good to let sit on things. ouh!!!...and bring lots of quaters to wash the degreaser off, use soap function then pressured water. Mine came up real nice :-D

440trk

I'm pretty sure the 727 behind the Cummins uses 3/8" lines.

I've bent up several sets of trans lines over the years, and they're pretty easy to do, if you have the right tools. Just take your time and think through what you're doing.

rusty250

so hydraulic lines will work. Thanks for the info guys

JustRamIt91

i've used 1/2" because thats what the cooler lines were. no problems so far.

440trk

Is your truck an IC or non-IC truck?

I thought the IC trucks with the OD trans used the 1/2"...but the earlier 727 Cummins trucks used 3/8" ?

JustRamIt91

mine is a non ic truck, and its the 3 spd 727 and uses 1/2" lines, as far as i know. i haven't gotten around to adding a temp gauge on the hot side but when i do i'll know for sure. I'll probably also add a cooler infront of the fuel tank and remove the one up front.

however i used to have a ramcharger which had a cooler and trans that went, that used 3/8 lines, i had the shop install the new trans and cooler for me. since then i refuse to let a shop do work that i can do myself.

JustRamIt91

edit- sorry for the double post...idk whats wrong with my girls laptop.

archer39

might want to be careful on what type of hydraulic lines you use some are only rated to withstand up to 150 degrees. i ended up getting my lines from discounthydraulichose.com and going with R5 general purpose/truck hose. It had the one of the highest temp ratings and still was some what bendable.

rusty250

hey archer how many feet of the r5 hose did u end up getting?

Benjamin b2

only thing bad about hose is it doesent disapate the heat as well as steel, just food for thought.

jw216

Just bought mine at Dealer $60

GasganoFJ60

My metal trans lines started leaking from them rubbing against one another. Took them off and into a machine shop and had them solder the holes back up for about $10. Might be a bit easier than tracking down or making all new lines.