Replacing leaking transmission cooling lines

Hello everyone,
Just got my 2010 Tacoma back from the dealer for the frame treatment and leaf spring recall work.

Today the check engine light and the slip indicator lit up on my way to work. Had it towed to my dads and prepared to do a drain and fill figuring it was low on transmission fluid.

What I found was that it has been leaking from the coolant lines. I plan to talk to the dealer ship about this given I haven’t driven more then 200 miles since the work. But given the holidays and the all I would also like to prepare to just fix it myself and get the truck back on the road.

I have searched the forums here for details on this and haven’t found quite what I need. What are the part numbers needed to replace the lines? Are there any fittings needed? If I do the brake line fix what fittings do I use?



Thanks for your help in getting my Tacoma back on the road.

 

Dang they should not have reused those lines. They look like crap.

 

And the ATF pan bolts. That underside needs a fluid film.

 

Are the connections loose?
It's odd to see those lines rusted through.

 

Well had it towed to to the dealer for inspection. The lines are cracked at the fittings and they are certain it is unrelated to the work they did. $750 for the repair. I was polite but told them how absurd this seems to me. They will talk to their service manager about it. Not holding my breath, but I assured them I wasn't paying them $750 to do anything to my truck.

So my original question remains. What lines and fittings do I need to replace the transmission cooling lines? Thanks for your help!

 

That was the first thing I put a wrench on when I got under there. They don't move at all. So seemed tight to me. And the entire underside of the truck is a horrendous rusty mess. Even after being descaled and treated it still looks like it was pulled out of the ocean. I love my truck but this has been a huge disappointment for me.

 

https://parts.toyotaofgreensburg.co...6725963/OIL-COOLER--TUBE-ATM/674470-3514.html

Click on "view more images" to find the line you are looking for.

 

Very common in cold climates

 

unless your frame is cracked dont worry about cosmetic rust ;P. Anyways at the toyota in my town says that the leaking lines for transmission is super common, i have a 2010 aswell and mine is also leaking. I was going to replace the lines today but its christmas eve so it can wait. Dont worry about it man.

 

with the right new lines and parts this looks like a doable DIY

 

are you replacing all the lines? are there o ring gaskets that go inside the connection terminals?

 

Just replacing the line thats leaking. If yours is the same line as mine its a low pressure line so it will only drip fluid over time anyways. As for the O rings, im not sure. Im going to put it up on the ramp and see what i need then buy it all in one shot. What the local guys in the tacoma group here were doing was just going to NAPA, getting some hose and clamping it on after taking all of the old line off. Where its a low pressure line it wont leak, and its fixed for like 15 bucks lol.

 

I would think using a liberal amount of PB blaster on those fittings and maybe a brake line type open end wrench would do it. maybe a little messy but looks doable. I would check with the parts dept see if the have those crushable o rings that need to get replaced to would suck to get it apart and find out u need them. I changed out a fuel filter on my 2004 taco with those type of high pressure lines and u have to use new washers in those connections or u get drip drip drip

 

https://www.tacomaworld.com/threads...sions-write-up-your-4-speed-automatic.325531/

 

I dont have any information in the above related link for cooling lines .I also beleive you have the 5 speed transmission , not the 4 speed
https://www.tacomaworld.com/threads...th-pics-for-second-gen-4-liter-trucks.289913/
Cooling lines can be replaced in about an hour .
Its just 5/16 steel line and regular couplings .
20 bucks for new lines and 20 bucks for fresh couplings plus an hours labor and fluid .
I dont think your couplings are OEM .
You should be out the door for 200 bucks

 

https://www.toyotapartsdeal.com/parts-list/2010-toyota-tacoma/oil-cooler-tube-atm.html no.1 outlet and inlet tubes #32922-04090 and #32921-04090 looks like to me

 

Bumping a little bit of an older thread because I had the same issue. Lower line part # is 32921-04100 and upper is #32922-04100. No additional fittings are needed. The nut at the trans end is already on the line and the forward end connects to a rubber line w/ a hose clamp. Discovered my lower line leaking yesterday when I went under to replace the hose clamp I have holding the drivers side cat heat shield in place as it was rattling again. $38 from the dealer vs $25 online but no shipping $ and they had it on hand so I’m fixed as of today. What a horror show of corrosion on all my lines though. Eventually I’m going to have to replace every line under the truck. Planning on replacing every trans line I can with just rubber line. I wonder how crazy of an idea it would be to just trash every bit of hard brake line, buy a spool of ss flex line and make my own from master cylinder all the way to the calipers.

 

How hard are they to remove at the trans? Getting ready to do this job

 

Depends how rusted. Mine was quite tight. I took a toothbrush sized wire brush and cleaned up the fitting as best as I could and sprayed it with penetrating fluid for a couple days prior. Use a line wrench on the 17mm line fitting. Spray the two line retaining clamps on the block too.

 

ive been trying to get them off for a hour now. Prob have to take it to a shop. I’ve been spraying them for a month hoping it would help but nope