Manual transmission cooler ??

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Manual transmission cooler ??

Postby Red_88GT4 » Mon Jul 29, 2013 12:49 pm

I just purchased a 1988 ST165 all trac. The previous owner did a engine swap and installed a 3SGTE engine from a ST185. I have never owned a celica until now. I noticed that it has transmission cooler lines coming off the 5 speed manual transmission, I have never seen a manual transmission cooler in my entire life.

What type of transmission cooler do I use for this project ?? I would like to mount the trans cooler down in between the fog lights in the front spoiler.
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Re: Manual transmission cooler ??

Postby BoostedBlueToyotas » Mon Jul 29, 2013 2:26 pm

Not sure if the 165 had a cooler installed. I think it had a short loop of tubing installed like they
used on the MR2 turbo.
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Re: Manual transmission cooler ??

Postby brutekiller787 » Mon Jul 29, 2013 3:05 pm

Yup it does. I had a trans with the lines. I'm sure you could fit a cooler somehow. JDM bling 17 row godspeed thing
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Re: Manual transmission cooler ??

Postby mx6er2587 » Mon Jul 29, 2013 5:51 pm

the st185s use a rather small transmission cooler. Any normal transmission cooler should more then suffice
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Re: Manual transmission cooler ??

Postby Red_88GT4 » Tue Jul 30, 2013 2:51 am

If I use a cooler from a automatic transmission, will the heavier gear oil flow through the cooler as good as ATF ?
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Re: Manual transmission cooler ??

Postby brutekiller787 » Tue Jul 30, 2013 3:02 am

obviously it won't flow like atf no matter what because automatic trans' have to have fluid pressure to do things, like apply bands and clutches and move through the valve body. gear oil just basically sits at the bottom of the trans case, being picked up by the gears as they move.

IMO, if your manual trans needs cooling that bad, there is another problem somewhere else.
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Re: Manual transmission cooler ??

Postby alltracman78 » Tue Jul 30, 2013 11:28 am

The E series transmissions have an internal pump.
That pumps the fluid through tubes to the gears.
And through the tube to the oil cooler, if it has one.
Or through the loop if it doesn't.

Nothing wrong with adding an oil cooler, it will extend the life of the oil.
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Re: Manual transmission cooler ??

Postby Red_88GT4 » Tue Jul 30, 2013 12:16 pm

If the transmission is designed for a oil cooler then I will install one. Until I get the oil cooler in the mail, I will just hook up both oil lines together to loop the oil back into the transmission.

This is the oil cooler I'm going to mount between the fog lights area. http://www.ebay.com/itm/UNIVERSAL-MOTOR ... 0383580%26
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Re: Manual transmission cooler ??

Postby brutekiller787 » Tue Jul 30, 2013 12:39 pm

Interesting. I just can't imagine that the fluid could get hot enough for something to go wrong. I mean worst comes to worst the gear oil would be slightly thinner at higher temperatures, causing less work to be done by the pump and the gears to move it around? Am I wrong?

Where is the highest heat generating source in a manual trans? Haven't had that class yet
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Re: Manual transmission cooler ??

Postby phattyduck » Tue Jul 30, 2013 4:01 pm

brutekiller787 wrote:Interesting. I just can't imagine that the fluid could get hot enough for something to go wrong. I mean worst comes to worst the gear oil would be slightly thinner at higher temperatures, causing less work to be done by the pump and the gears to move it around? Am I wrong?

Where is the highest heat generating source in a manual trans? Haven't had that class yet
The cooler runs between the oil pump and the oil jets for the synchros. Its not so much to cool the gear oil as the synchros. That said, a hard working manual transmission with hypoid gears (like transfer case) does get hot and can use a cooler. The smallest trans cooler you can get should be sufficient though, no need to go overboard. I currently run my transmission with just the cooling loop (motor swap into different chassis), but may change back to stock-style someday.

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Re: Manual transmission cooler ??

Postby mickeyfinn » Sun Oct 30, 2022 4:19 am

Wilhelm Raceworks makes a kit for our transmissions here:
https://wilhelmraceworks.com/transmission-cooler
Here is a video of it being installed in an MR2:
https://www.youtube.com/watch?v=hhycP-DK980
ST165 has an E50F Transmission and this kit fits both E50F and E153.
It's a very tight fit with the Intercooler pump and the Clutch line. But, I have it installed in my ST165, and it's AWESOME!
Had to modify the transmission cooling duct a little bit, and air flows right over it.
Kind of pricey, but very high quality kit! Worth it IMO.

Edit:
You will need this adapter for ST165 instead of the one that comes in the kit:
https://www.holley.com/products/plumbing_an_fittings_and_hose/adapters/carburetor_-_power_steering_-_fuel_pump_-_fuel_injection_adapters/inverted_flare/parts/AT991946LERL
It's strange, but the threads for the tube coming out of the transmission are 1/2-20 not Metric.
(1/2"-20 Inverted Flare Male w/ Long Thread to AN -6 Male Adapter Fitting - Black Anodized Aluminum)
Attachments
E50H Cooler.jpg
Last edited by mickeyfinn on Mon Nov 14, 2022 7:23 pm, edited 2 times in total.
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Re: Manual transmission cooler ??

Postby Tippo » Wed Nov 02, 2022 12:04 pm

mickeyfinn wrote:Wilhelm Raceworks makes a kit for our transmissions here:
https://wilhelmraceworks.com/transmission-cooler
Here is a video of it being installed in an MR2:
https://www.youtube.com/watch?v=hhycP-DK980
ST165 has an E50F Transmission and this kit fits both E50F and E153.
It's a very tight fit with the Intercooler pump and the Clutch line. But, I have it installed in my ST165, and it's AWESOME!
Had to modify the transmission cooling duct a little bit, and air flows right over it.
You will need this adapter for ST165 instead of the one that comes in the kit:
https://www.racetronix.biz/p/adapter-6an-male-12x125mm-male-blk/adf-6j12125m
Kind of pricey, but very high quality kit! Worth it IMO.


Trans coolers are kinda niche, but unless you're tracking the car they're not necessary. I went through the process of installing a new one on my ST185 because it's stock and I am tracking the car.
1992 SW20 MR2 Turbo 4th Gen 3SGTE Swap. Aquamarine Pearl. "Priscilla"
1992 ST185 Celica All-Trac Turbo 4th Gen 3SGTE Swap. Teal Metallic. "Lazarus"
1990 ST185 Cellica All-Trac Turbo. Grey Metallic. "Mirum"
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