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---->V6 Auto trans cooler writeup (for you non tow package guys)

29K views 38 replies 22 participants last post by  Jeff194  
#1 · (Edited)
Here is a quick write up on how to install a transmission cooler on the V6 Automatic transmission. I used a B&M 70255 from jegs.com it cost me 60$ shipped with 2 day shipping. jegs B&M 70255




Materials/tool needed
---------------------------------

24mm socket
10mm socket
12mm socket
Small nut drivers
Alan keys
Pliers
Dikes
Knife or blade
One Quart Toyota WS Transmission fluid
A pump to get the fluid back in the transmission fill plug. This is imposable to do with out
Zip ties
Some 3/4" Self taping metal screws
some trim guard/rubber extra 3/8,1/4" hose





1) Remove the grill and OEM skid plate. Mount the cooler on the driver’s side where the lines are (best way in my .02) I used 3 mounting points. I used like 4 self tapers along the center radiator support and one supplied bracket on the lower portion of the lower radiator support (OEM hole). I feel this is enough. You may see a better way to mount. I painted the screws with some black rustolium paint that I had. It’s brushed on so it might look funny in the picks.

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1-a green arrows) Use some trim guard or some rubber hose around the radiator support where the new hoses pass threw so they don’t chafe. This would lead to a leak and that’s bad news :disappoin


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2) Begin by Running the supplied hoses. Remove and disguard the bottom OEM line on the radiator this is the return line. The idea is that the radiator will cool the fluid most of the way before you run it threw the B&M cooler.

3) Attach the hose from that bottom line of the radiator to the top of the B&M cooler

4) Attach the left over hose from the bottom of the B&M cooler to the Steel return line under the skid plate area


(looking in from the drivers side of the truck)
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Make sure the hoses are not kinked at all. Make nice sweeping turns. Now go back and double check everything and zip tie any hose that needs it.

5) Start up the truck and check for leaks. I let my truck run for 20 minutes and found no leaks. Go for a drive for 10 minutes.

6) Open the transmission overflow plug located on the bottom of the Trans. It’s the one with the Alan key in the center.


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MAKE sure you use Toyota WS fluid and not Type-4 IV like I did during my refill. :hammer: Im not sure if this is sold by the quart or not.

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7) Crack open the 24mm fill plug on the passenger side of the transmission. Connect your transmission bottle to your pump or hose and start working in the fluid until it comes out of the bottom overflow plug. I pumped in the whole quart and it just started dripping out at the very end of the bottle. I guess I lost near one quart of fluid during the whole process. I rerouted the hosed a few times during my install until I got things the way I liked.

8) Install the 24mm plug and overflow Allan plug and your done reinstall the skid and grill and your done.
 
#3 ·
Thanks crusty.
 
#4 ·
Very nice. You did a great job and this is something I've been planning on. Just one thing: Add the trim guard/rubber hose to your shopping list at the top. Yeah, it's obvious but someone like me would never think of that.

BTW, how does your wife feel about you using her quilt for a drop cloth? :cursin:
 
#6 ·
Thanks if there is anything else I missed point it out. I was drinking a bit after the install during the writeup.

That old quilt has been in the shed for years :lol: its covered with trans fluid now. So is the sleeve of my hooded sweatshirt. Does that stuff come out in the wash? I really made a mess of my shirt. :disappoin
 
#8 · (Edited)
Is T-IV Fluid the same as World Standard (WS) Fluid? From what I can gather it isn't. I think you just put the wrong fluid in your transmission. Our new A750* Transmissions are designed to use Toyota's new WS Fluid and using any other type of fluid could cause damage to the transmission by eating away at the clutch packs. As far as I know WS Fluid is only sold in Gallon jugs at about $40 a jug.

Otherwise awesome write-up!
 
#9 · (Edited)
#15 ·
Thanks for the info.

i'll bet lotust was steered in the wrong direction by a toyota parts guy. :ugh3:

watch him raise hell and get a free flush. :lol:
Sigh... yes thats what The parts guy gave me. :ahhhh: Im calling them asap. I told them "I have an 06 V6 automatic"
 
#12 ·
i'll bet lotust was steered in the wrong direction by a toyota parts guy. :ugh3:

watch him raise hell and get a free flush. :lol:
 
#16 · (Edited)
no thats looking up from under the truck. We all should have them including the tow package guys.


Hey Shawn I made this a "Sticky" in the DIY section. But can you find out about the Trans fluid? (T-IV or WS)

I wouldn't want people to have the wrong info.

Great write up!:thumbup::thumbup:

Ok you guys were right. I called the dealer and explained what happened. I was on hold a few minutes and they asked when I could drop it off. I said right now was ok :lol: They took care of it an apologized for their parts guys’ mistake. I should have caught this :hammer: But thanks to TN it’s all taken care of. They flushed it all out with the machine. I guess I don’t have to do a write-up on a flush and fill now :lol: They never said aything about me instaling the trans cooler.


:grouphug:
 
#17 ·
guys,

in my career as a mechanic... i have alwasy said run a tranny cooler through the radiator then the cooler.

maybe you live in California or something where it is hot all the time... but if you live in the cold like me... you need the rad to heat the fluid up a little or the cooler is going to gel it ...

anyhow just a heads up

cheers
Warts
 
#18 ·
it is an auxiliary cooler. Regular tranny cooler is next to the Engine radiator. He is running lines thru the factory radiator first, then B&M.
 
#20 ·
Great info guys, and thanks for the write-up lotust.:thumbup: I'll be installing a tranny cooler here soon myself as I will be buying a bigger boat to tow. I'm sure I will install an engine oil cooler too.
 
#21 ·
Hey Lotust, congrats on a nice job!
'Sorry to hear about the tranny fluid.
The 'WS' is sold by the quart, if you're lucky enough to find it
at a dealer.... I got mine at Longo Toyota, in Cali.
I carry an extra quart just in case something goes awry....
try finding some at Napa!
 
#23 ·
This thread doesn't pertain to me as I already have the factory cooler.

But I wanted to say thank you for taking the time and effort to post the pictures and clearly instruct on how to install one.

That's what makes this forum great, valuable and ultimately practical on an individual basis. That is, the contributions of the members themselves.

Because in the future, I know that thanks to members here, I'll benefit from a thread and hope to provide some contribution in return.

Bravo.:clap:
 
#24 ·
Nice write up Lotust! Ran across it looking for info on your DIY tow package setup since someone on Tacomaworld wants to embark on the same journey. So I also linked it to my cheap/free mods thread over there for others to use. :D
 
#26 · (Edited)
I ran into a pretty major jam following these directions.


I installed the same exact cooler, that all went smooth, no problems..

I let the truck warm up, no leaks, went for a drive.. came home, opened the fill plug,

opened the check plug (the one with the alllen key) and fluid started GUSHING out.. around half a quart total..

so AFTER the install.. according to the check plug. .. I had half a quart too much fluid in my truck.. Obviously this made not 1 lick of sense... and I could not fathom how it would be possible to INCREASE the capacity of the system, and then have TOO MUCH fluid afterward..

Then after reading around I found out that the only way to properly get the correct fluid level is to have the dealership do it, as they have to hook up a scan tool and check/adjust the fluid level when the fluid temp is within a certain temperature range due to expansion. so a person (unless they have the scan tool and such) cannot properly fill the transmission to the correct fluid level, and may very well overfill or under fill it due to not knowing the temperature of the fluid when you are checking/filling it.
 
#27 ·
Search, you can read the tranny temperature with a wire jumper in the OBD port. Fluid expends when hot, that's why it came gushing out.
 
#30 ·
Yes the truck was one without the tow package.
 
#32 ·
#33 ·
Jeddak is correct, checking/adding the transmission fluid in our trucks is NOT so easy. The tutorial on how to do so has been posted many times on this forum, including in the link posted by Jeddak.
 
#34 · (Edited)
From what the guy I dealt with told me, if you let the truck run from off to full warm up (engine temp needle half way and no longer moving) Your transmission fluid temp will be within in the specified range. Stating that when the radiator is at full temp, that it will warm the trans fluid to about 120 degrees, + - a few degrees due to typical variables. He went on to say about the only ways you would be out of that range is if you started before the truck reached operating temp (too cold) or if you tried to do it after alot of shifting/hard driving (too warm).

Thanks for the link though, Im actually going to try that this evening just to see..

Ill note how long it takes for the truck to hit check temp idling from a cold start, how long it stays in the "zone" before it gets too hot.. and also the correlation to engine temp, though Im pretty sure the engine will reach operating temp before the trans fluid hits 115.

at any rate it should be an interesting experiment!!


anyone got a pic of the OBD2 plug showing the pinout?



EDIT: one thing that throws me, is that it says: If nothing comes out, you'll have to turn off the engine and add fluid through the filler plug I hope he means replace the check plug THEN turn of the engine, because if you shut her off with the check plug out, even if its low fluid will start pouring out of the check plug hole due to it draining from the top of the system because the pump is no longer running.
 
#35 ·
I just flushed mine 05 DC auto, and added a remote filter. Anyway I used an IR temp gun which I aimed at the bottom of the pan. When the temp hit 115 I figured i was within the spec of 115 - 130 deg. Was alot easier then the jumping pins, and moving the gear shift, for me anyway. I also used Valvoline MaxLife Dex/Merc. I like it, shifts smooth, and seems quieter.
 
#37 ·
I used an IR temp gun which I aimed at the bottom of the pan. When the temp hit 115 I figured i was within the spec of 115 - 130 deg. Was alot easier then the jumping pins, and moving the gear shift, for me anyway. I also used Valvoline MaxLife Dex/Merc.
good thought on the temp gun!

is that valvoline stuff WS rated? i've read that you really need to use the WS stuff...if its not, have you heard different?