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Hayden Transmission Oil Cooler Install

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Old 08-16-2010, 01:02 AM   #1
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Post Hayden Transmission Oil Cooler Install

A bit late to the party but after all these years I finally installed one. I'm sure there's lots of threads about these here on TW & on other forums but I'll share my install.

I choose the Hayden 678, the TRD one is way too much money IMO for the same core but with brackets. I didn't like the TRD's mounting location anyway.

I'm not a fan of using those zip ties through the radiator or condensor so I made my own brackets. Only the grill was removed for the install, bumper stayed on.


First I had to remove the left/driver side horn which would be relocated later.




Mock up:
Used an L shaped aluminum bar from Lowes.


Used a sheet metal screw here but will replace this one with a bolt.


Used an existing hole on the center support bar for the grille.


Cut a section out to clear the radiator support.


Used a another sheet metal screw here.



The three aluminum spacers I turned on my lathe.

EDIT: I don't remeber the exact lengths I made them as I turned to fit during the install. But from roughly measuring with just a ruler the top one is 15/16" & the the two others are 3/8". YMMV




Cut a relief on the oil cooler with my bandsaw to clear one of the grille's mounting post.


I choose to run the lines through the same opening for the AC condensor lines. I slipped some covers over the hoses & added some rubber trim to cover up the edges of the hole for added protection.


After paint:






Soldered on some wires to extend the left/driver side horn.


The horn's new location using an existing hole in the radiator support (now it really is the driver's side horn).


Completed Install.







In the end, there was only two holes I that I drilled on the chassis.

The hose included with the kit is 11/32" & does fit on the stock barbs fine. You can get 3/8" if you want an easier fit. I choose to use the 11/32" hose directly to the hard line of the transmission & used the stock spring clamp because of space constraints.

In case anyone is wondering about the OE heat exchanger, the driver side of the radiator is the return (back of tranny). It's your choice on using the oil cooler before or after the OE heat exchanger.
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Old 08-16-2010, 02:32 AM   #2
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Nice job.... would you be willing to install for others and if so how much would it cost???
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Old 08-16-2010, 06:01 AM   #3
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Very nice. It's already on my to do list though.

Notice much of a difference?
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Old 08-16-2010, 07:53 PM   #4
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Quote:
Originally Posted by jesus View Post
Nice job.... would you be willing to install for others?
Sorry, probably not. I quite doing installs for others ever since I stopped working at my buddy's race shop.


Quote:
Originally Posted by Manlaan View Post
Notice much of a difference?
Yes & no. Tranny shifts are smooth now but that's probably just cause the oil had not been changed for 80K miles or so. If it weren't for the oil change I doubt I would notice a difference just driving around without load.
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Old 08-16-2010, 08:01 PM   #5
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Nice work.

I got the towing package on my truck even though I hardly ever pull anything...primarily for the transmission and oil cooler, as they will add to the longevity of the truck down the line.
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Old 08-16-2010, 08:24 PM   #6
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I been thinking about doing the trans oil cooler for years (kinda late also) and I think I will do it after seeing your excellent write up and photos.
Thanks for the post.
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Old 08-17-2010, 08:10 PM   #7
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My Engine Oil Cooler is leaking...I need to place it...Toyota wants 1K for one Can I use this Hayden Trans Oil Cooler instead? If so...whats the part # and how much? Thx Matt

(M-OC-1676) 77, 78, or 79?
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Old 08-17-2010, 10:13 PM   #8
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nice man, i need to get a tranny cooler...among all the other crap i "need"
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Old 09-02-2010, 01:50 AM   #9
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My truck didn't have the factory "towing package". My truck came with a U-haul class III hitch & it had a 4 pin & 5 pin socket installed. After adding the tranny oil cooler I was looking at getting the towing fan clutch too. To my surprise I already have the green fan clutch.

Can anyone with a 3.4 double cab check and see if they have the orange fan clutch? I'm wondering if the prev owner put the green one on or if all double cabs come with the green one. Then again the prev owner also installed a oil filter relocator.
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Old 09-02-2010, 03:52 AM   #11
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Do you have a scangauge to monitor the temp?

If so, how are the temps under a heavy strain before and after?
I can tell you my before temps, but dont have the cash to put one in yet to see how much of a difference it makes.

The standard setup is getting to about about 170-180 degrees normal driving (normal operating temp according to FSM), about 220-230 while on a trail (seems pretty high to me as to why I'm really wanting to do it).
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Old 09-02-2010, 04:15 AM   #12
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I have this same type Hayden stacked plate cooler on my car. It's about 33% more efficient than tube & fin coolers. They come in different sizes depending on GVW. Works great. I did run mine thru the factory "cooler" then thru the Hayden. The return oil is luke warm, you could hold the hose bare handed all day with car at normal warmed up temp. The one coming out you can hold for a few seconds before the burn starts. You can really extend the life of the tranny with this. I'm also running AMSOIL synthetic atf and that helps keep temps down too. Very worth the 50 or so bucks depending on what size you get. I didn't do any custom bracket install, just used the mounting stuff that comes with it. Nice write up.................
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Old 09-03-2010, 08:48 AM   #13
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Quote:
Originally Posted by zero4 View Post
My truck didn't have the factory "towing package". My truck came with a U-haul class III hitch & it had a 4 pin & 5 pin socket installed. After adding the tranny oil cooler I was looking at getting the towing fan clutch too. To my surprise I already have the green fan clutch.

Can anyone with a 3.4 double cab check and see if they have the orange fan clutch? I'm wondering if the prev owner put the green one on or if all double cabs come with the green one. Then again the prev owner also installed a oil filter relocator.
I just stepped outside after reading this, and my 2003 3.4 DC 4x4 TRD SR5 has the orange fan clutch...and I do not have the towing package. Seems like you really lucked out there brother.
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Old 09-03-2010, 09:58 PM   #14
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Quote:
Originally Posted by Manlaan View Post
Do you have a scangauge to monitor the temp?

If so, how are the temps under a heavy strain before and after?
I can tell you my before temps, but dont have the cash to put one in yet to see how much of a difference it makes.
Nope don't have a SG. From what I've read the 1st gens don't have trans temp that can be monitored through the OBD port but then again not sure. I would like to add a trans temp guage but I do do a lot of heavy towing to be worrying about so it's not on my list of things to do.

It does make a huge difference, like T@co_Pr3runn3r said the return line coming out of the cooler going into the tranny I can hold with my hand & it's just warm unlike the inlet line which is pretty hot. I checked this after do some hard runs up some steep hills by my house in 2nd gear. More than worth the $50.


Quote:
Originally Posted by iDigTulsa View Post
I just stepped outside after reading this, and my 2003 3.4 DC 4x4 TRD SR5 has the orange fan clutch...and I do not have the towing package. Seems like you really lucked out there brother.
Thank you very much for checking, another thing I didn't have to buy!

I got my truck with 30K mi on it & it came with the ClassIII hitch, oil filter relocator, bed extender, Flowmaster, a K&N FIPK, & it was debadged. Probably wouldv'e passed on the Flowmaster & FIPK though. I sold the FIPK for a good price, bought a stock airbox & intake tube for $50 & it came with a K&N drop in. I guess I did luck out on this one.
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Old 09-03-2010, 10:54 PM   #15
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Quote:
Originally Posted by phantom View Post
just a quick note

scanguage11 does NOT show tranny temps for tacoma's
Well... we have a dilemma here. Manlaan, (who has a good rep in this section) implied that he was reading temps from his SCII for his auto tranny. And along comes Phantom (with his 2nd gen) who clearly states that SCII cannot read auto tranny temps. Which one is right?
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Old 09-03-2010, 11:09 PM   #17
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Quote:
Originally Posted by Digiratus View Post
Well... we have a dilemma here. Manlaan, (who has a good rep in this section) implied that he was reading temps from his SCII for his auto tranny. And along comes Phantom (with his 2nd gen) who clearly states that SCII cannot read auto tranny temps. Which one is right?
From what I found in the past, 1st gens don't have tranny temp monitored through the ECU. Not sure about second gens though. I think I do remember reading on TTORA that for 08s or 09s you can read tranny temp doing the X-guage thing.
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Old 09-03-2010, 11:58 PM   #18
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Hi! I'm a noob on the forums.
just to share, I have a first gen i think. (2000 Prerunner 2wd) and i have SCII. i added what seems to be a code to monitor Transmissions Temp. it seems like it is since it closely matches the water temp and really goes up when i am pulling a load. matches also the water temp in the morning at startup but climbs faster than the water temp when i am underway. its a ISO code i believe as opposed to CAN.
been using it for the last few months and am convinced that its the Tranny temp i am monitoring...

really new here. probably my 2nd post this one.

Hope that helps.
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Old 09-04-2010, 12:48 AM   #20
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Quote:
Originally Posted by SENIOR TACOROJO View Post
Just ordered the ultragauge or whatever that group by is. Was hoping it would be able to pull tyranny temp. All well.
Nope, the UG definitely won't do it.
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