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R34 Gtt Auto Trans Thermostat Help

re34perGTT
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re34perGTT Community Regular

re34perGTT

Posted
Posted

Hi,

I'm upgrading my trans cooler and I'm wondering if r34's have a thermostat on them already so I can just take the hoses off the stock one and put them on the new one. If it doesn't have one what would you guys recommend for one ? Preferably something not too pricey..

Also is the plumbing for the trans cooler just 1 line from the box to the cooler then 1 line back or is it connected to anything else ?

Any help would be greatly appreciated ! :)

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scotty nm35 Grand Master

scotty nm35

Posted
Posted

No thermostat stock, generally you need to leave the fluid going through the radiator on a road car.

I run a $30 inline transmission thermostat off ebay, the blue ones. You will likely see them if you look through. They are 10mm fittings so you may need to muck around with the 8mm lines to get it to fit.

A trans cooler can never be too large, and it needs to be after the radiator outlet and thermostat. You will need to work out which line is pumping out and which is the return without making a massive mess preferably. :P

GTSBoy Grand Master

GTSBoy

Posted
Posted

R34s have a small external trans cooler. I would expect that there's no thermostat involved because it's not very large. You could probably double or triple its size on a car being worked hard without too much problem, unless you end up driving it around gently in cold weather.

The question of whether you actually CAN run a thermostat in that line is another problem. I don't know if the cooler line runs the total flow of some circuit or if it's just a bypass. If it's not a bypass in it's own right, then a thermostat in that line would need to have a bypass in it to return flow when closed.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Hi,

I'm upgrading my trans cooler and I'm wondering if r34's have a thermostat on them already so I can just take the hoses off the stock one and put them on the new one. If it doesn't have one what would you guys recommend for one ? Preferably something not too pricey..

Also is the plumbing for the trans cooler just 1 line from the box to the cooler then 1 line back or is it connected to anything else ?

Any help would be greatly appreciated !

Something else - normally the radiator . This helps to bring the auto up to temp quickly from a cold start. I would guess temps are normally high where you live so a thermostat may not be necessary. If you are keen you could install a temp gauge for a while and see what you get.

turboedsloth Grand Master

turboedsloth

Posted
Posted

No need for an inline thermostat with autos unless you live where it is really cold

If you do fit one make sure it has a bypass until it warms up otherwise you'll starve the rear planetry of oil and damage it

Trex Grand Master

Trex

Posted
Posted

Fitted my stand alone davies craig 679 and driven it with no problems in 6-10deg weather every morning. It is placed behind the grill and takes roughly 10min for the trans to go into lockup if driving like a normal person on 60-80k roads. When the weather starts to get colder if I notice any adverse affecs I will add a plate that can sit over it and shield it from air. It got rid of all flairing inbetween gears and shifts better than before. (Could just be masking another problem)

re34perGTT Community Regular

re34perGTT

Posted
  • Author
Posted

Thanks for all the help and suggestions guys. But as this is a daily and gets used in mornings when it's fairly cold I'd like to be able to get it to temperature quicker and I'm not a big fan of cooler covers. Also since I'm doing a shift kit, trans temp gauge and trans cooler I'd like to do it properly and add the thermostat while everything's pulled off.

I'm slightly confused with the plumbing of the stock cooler but. Is it not just a straight line from the tranny to the cooler then a line straight back to the tranny ? Or does it connect to the Intercooler as well somewhere along the line ?

re34perGTT Community Regular

re34perGTT

Posted
  • Author
Posted

Ah that's what I wasn't sure about. Cheers for that guys. Also cheapest I can find an external thermal bypass is like $50+. Is there any thermostat from Supercheap or something I could use ? If so what one would you recommend and does anyone know what's the minimum temperature for safe performance and for the thermostat to open up ?

Cheers

scotty nm35 Grand Master

scotty nm35

Posted
Posted

This is the one I use, $30us or there abouts.

Here is a link I found.

http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=2&Product_Code=708-4739&Category_Code=tru-cool-hd&Product_Count=7

post-63525-0-82113300-1428288646.jpg

re34perGTT Community Regular

re34perGTT

Posted
  • Author
Posted

Cheers for that

Also reading the description the Inputs and outputs seem a little small in diamiter. Won't that restrict flow?

And while I'm here I'm looking to install an oil temp gauge and I need a housing for the temperature sensor. Would you happen to know where to get one ?

Trex Grand Master

Trex

Posted
Posted

The hosing for the Davies Craig kit I bought looks pretty wide so I just wasn't sure. And good idea with the bung on the sump but I'd like to do that as a last resort

3/8 is loose on the 679. They are thick lines, that's all.

I believe Scotty was talking about a temp gauge in the last auto thread, using a sensor adaptor for the 3/8 lines.

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