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I am planning on investing in an external stacked plate type of trans cooler for my truck & my question is, do you guys just bypass the stock cooler or do you install the external cooler to the line that is coming out of the stock cooler? That way you would have trans two coolers... right? Thanks for your input
 

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When I put mine in I basically ran out of the stock cooler and into the new one and back to the tranny. so yea.... Basically 2 coolers. I am pretty sure any after market would work, mine is TRD that I baught for a great deal. TRD is normally expensive though. This is a great investment if you spent long periods in low gears or pulling anything. I think I have a PDF of an install, if you want I can email it to you.
 

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Uneasy Rider said:
I am planning on investing in an external stacked plate type of trans cooler for my truck & my question is, do you guys just bypass the stock cooler or do you install the external cooler to the line that is coming out of the stock cooler? That way you would have trans two coolers... right? Thanks for your input
The best way to do it is to run the output line from the stock cooler into your aftermarket external cooler then route the output from external back to the tranny so that both of them are working.
 

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Stinks like fish
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Sounds good. I like running the tranny fluid through the radiator first. Toyota designed an awesome fluid temperature management system into the Tacomas. Motor oil, and Transmission fluid both exchange temperature with the coolant, and I have never had a coolant temperature problem when I have had to stop several times to give others water for overheating 4x4's in the sand on a hot summer day, this has never been an issue I usually have the windows up and the A/C cranked at this point BTW.) Everything stays nice and stable, but with towing Superchargers, large tires and offroading the tranny fluid can get out of hand so the external cooler ran in series with the stock cooler is a great way to keep those temps under control.
If you live in an area that freezes often then you might want to rig it up so that you can run through the radiator last in the winter. This will prevent over cooling The idea is to keep the fluid in the ideal operating temperature throughout the loads you put it through.

MMMM A clean beach is a happy Beach. http://corpusfishing.com/pinst.htm

 

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i put mine in front of the radiator, a Hayden stacked plate unit, Medium HD, cost about $60 vs TRD costing $200
I installed the lines to run just after the radiator cooler lines, I also added an external filter(Magnefine) I can sell you one, I have 3 spares cost about $25, def worth it since Toyota automatics only have a filter screen within the transmission pan.
email me
[email protected]
 

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I swap my lines depending on season. In summer I run it through the bottom of the radiator, then the cooler (Hayden 679 mounted in front of radiator in my case) and back to tranny. In winter I run it through the cooler, then the bottom of the radiator and back to the tranny.

Helps it warm up quicker in winter and returns the coolest fluid in summer.
 

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always a Toyota lover at heart
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Steve, off the subject:
Are you still running the storage space under the second floor of your bed with the duall battery and other acc?
I would like to do someting like that
I am buying a used CAN BACK and want to run a similar setup
thanks
[email protected]
 

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Could you email it to me also at [email protected]?? I have a Hayden cooler and I need to get it installed before summer. I'm assuming that I could follow the TRD instructions without a problem... Just not sure which lines to use... Thanks in advance.
 

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Which oil cooler would be suggested to use? Interisted in purchaseing one but don't know what size to get.
 

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Just got my Hayden 679 today and I want to put it on tomorrow. How much fluid do I need to add to compensate for the Tranny Cooler? DO I just add to the reservoir?
 

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It depends on how much you spill during the install ;)

Just buy two quarts it should only take a little less than one if you don't spill much when you are disconecting the lines.. . , Yes you add to the reservoir. With what yo don't use to top off in the tranny you can do a partial fluid change in the power steering.
 
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