Replacing leaking transmission cooling lines

They don’t look any worse than mine were. 19mm on trans side and a17mm line (not open end) wrench and go gorilla on it. If that doesn’t work and you’re not in a rush get the two #32921 trans fittings and replace from there. Your lower line looks like it’s ready to break off right at the fitting anyway. Snap it off and go for it all.

 

Yeah they are jacked in multiple spots...I am replacing them from the trans to the cooler with rubber to prevent any future issues. That’s if I can get them off ha ha

 

must use crows foot / flare nut wrench on tranny end. Better yet get the fittings for the tranny also. I got my lines from the dealer, but at garage cost. Not a bad job once you break the connection free

 

I had a similar problem on my Corolla. Mine didn't have the fittings on the end, just linked some rubber lines with some clamps. I bought some brake line from Autozone and made my own. For the cost savings, you could buy a cheap bender. I don't know what kind of pressure those lines need to hold during normal operation though, so proceed with caution if you go this route.

 

Low pressure. Nothing to be concerned about. Trans end is the fittings, forward end connects to rubber line w/ just a spring clamp.

 

If you make your own hard lines, use a flaring tool to put a bead on the end that a hose attaches to. Do the 1st part of doing a flare, but stop when you just have a nice bead.

 

Mine is a leaking mess right now and I have been waiting on parts from Toyota for 3 days now with zero updates. Did you use rubber hose all the way through?? If so can you shoot some pics and parts list?? I have been scouring the internet and keep coming back to this post so any help is appreciated

 

I have been looking at my lines recently no leaking but pretty crusty, is there a way to safetly clean these up and corrosion proof them, these trucks turn into rust buckets everywhere you look

 

On my 2006 the fittings that went into the side of the transmission Were the same size as brake line tubing with the flared end and nut. It’s been so long I do not remember size, but transmission forward is all rubber now.

 

Thread necropsy.
Just did my 2010. Blew a line passing a tractor trailer on an uphill grade.
Trans wouldn’t downshift after passing. Was fine for a couple days after shutting off and restarting, then was shifting rough out of park/neutral, or leaving a stop and did the research and figured out fluid was low and found this thread.
Anyhow. Just popped in here to help anyone else who had the same issue as I had. Flare/tube wrench was flexing on the rusted fittings and I was afraid I’d round the hex.
easily solved it by cutting the tube off, about 1/2” from the fitting, and then cracking it loose with a 17mm 6-point deep socket. Doesn’t matter that much but was using a 3/8” drive socket, with a 3/8-1/2” drive reducer, and a 1/2” drive ratchet (because I busted my 3/8” drive rather recently and haven’t gotten it replaced yet.)
Held the trans case fitting with a 19mm combination wrench and applied torque by squeezing the combination wrench and ratchet handle together, to avoid applying torque through the fitting, to the case.

 

That's exactly how I did mine a couple years ago. Just cut the line.

 

i just saw this thread... my 09 is leaking... i had it replace and with rubber with my mechanic that I deal with... but still leaking somewhere...
is there any leaking check detection available to solve this??

 

I'm dealing with this as well. The fittings that attach the lines to the transmission are toast (rust). Does anyone know what the OEM part numbers are for the fittings? I found the lines, but can't find the 32921 fittings.

 

Question. Does anyone have a photo of the transmission lines connecting to the correct hoses? All I can find is a photo of the lines from the transmission to the hose but not all the way to the lines located under the radiator. I just did this job and want to make sure the inlet and outlet lines are connected to the corret hoses.