Transmission Cooler on 2017

First for the recorded will change out rear end fluid for Amsoil today. I have been watching transmission fluid temp [scangage] in traffic with 88 outside, it hit 210 few times now. I'm at point I feel the need for a transmission cooler, How can I find out which line is the return line off the radaitor. Also does the tacoma with towing package only use an external cooler? I have looked at the service manual on line, and have not been able to find the return line.....

 

https://www.tacomaworld.com/threads/3rd-gen-transmission-cooler-upgrade.482280/#post-14723804
Here is a good thread, maybe ask here
Good luck

 

I read all the posted here, [well most] seems most people are talkin more about problems with toyota corp and their tacoma than upgrades. I had a Gen 2 tacoma, it wasnt prefect but i didnt dwell on it. Lots of 2nd gen. transcooler upgrades, changing over to amsoil fluids, etc.....seems many to scared to ever touch their truck. Heck I get which line to radiator is the return line, i will post a how to on cooler and how i did it........

 

Just curious, are you changing over you ATF to Amsoil as well? Just had the dealership change my front & rear end fluids yesterday to Amsoil when I brought it in for 15k check. And of course I've been running Amsoil oil since 5k oil change.

Was looking at changing over ATF and transfer case fuild as well, but after talking to dealer, he said that they don't recommend changing the ATF to a aftermarket fluid and that Toyota is very particular about warranty work when it comes to the transmission. I guess this could be true for anything... He said he would change it, if I wanted to, but just advised against it. So I left it stock for now, especially since I paid for a 100k extended warranty. That being said, I'm not afraid of changing things, already changed out y-pipe, exhaust, intake, suspension, etc. And every other truck I've had in the past, I usually swap all the fluids pretty early in the vechile's life. This is just my first Toyota, so the dealer has me second guessing myself... Not everyday they don't want to just take your money.

As far as the transfer case goes, I couldn't find a different replacement from any aftermarket fuild. After doing some research here on TW, it looks like Toyota hasn't released their proprietary specs yet on it, and their isn't really a direct replacement on the market yet. Saw someone said that Royal Purple Syncromax was closest thing, but after comparing to the stock fuild, the stock transfer case fluid was much thinner... So just figured I'd keep it stock for now.

 

I can't get my Scangauge to pick up transmission temp. What code are you using?

 

My dealer here will not put nothing in any tacoma in or out of warranty but toyoto products, will change rear end fluid my self and also the power steering fluid. Will leave the WS fluid in transmission for now little scared to change it at this time as I to have the 100000 mile warranty. Feel I have to add the transmission cooler due to the high temps am seeing. Kemtok as for the codes for the scangage I dont no, put them in a long time ago when had my 2nd gen, tacoma. I got the codes here in the formun for the 2nd gens. Wish i could be of more help. Again if anyone nos which is the return line off radiator to trans, please let me no.