Diff / transfer case coolers

[Amaru]

I can pick up a couple of 19 row "oil" coolers for a good price at the moment. I am just curious, as the car is slowly getting to be a majoritly track driven car with occasional street use, if theres any gain in getting two extra coolers and using them as rear diff and transfer case coolers??

Granted the fluids would always be running through them, is there any down side to street driving with the transfer case and rear diff fluids always being cooled (I assume they would get quite hot being continuously flogged on a track)?

Also suggestions on mounting them... I have seen some Japanese based track cars with them mounted under the rear section of the car near the fuel tank. Would they get adequate cool air under the car??

Any info muchly appreciated

[ylwgtr2]

uk spec 34's have them also

[djhatton]

not too sure about diffs, but as you know, i'm sure, transfer cooler was oem on the aussie delivered so thats a given.

re: under the floor, i can't see any issues so long as you duct them right...

d

[Ronin 09]

Yes, but don't forget to factor in the pump, lines etc etc.

see the PDF I posted with the Aus GTR spec transfer case cooler pic in this thread

http://www.skylinesaustralia.com/forums/sh...ead.php?t=68975

[Mike Rowe]

Yes, but don't forget to factor in the pump, lines etc etc.

see the PDF I posted with the Aus GTR spec transfer case cooler pic in this thread

http://www.skylinesaustralia.com/forums/sh...ead.php?t=68975

The short cut doent take me to the PDF - can you send it to me?

thx Mike

[Deano 1]

what kinda pump would you use??

[Luke_ENR34]

I'll be going diff and transfer case coolers in my car.

I'm going the Weldon Racing pumps.

[Mike Rowe]

Does anyone have a drawing of an oil cooler and oil pump set up for the GTR transfer case and also diff ? - where to pick up oil from the transfer case & diff and where to mount the pump and cooler?

Where do people get their pumps from - Weldon and what other pumps are available that will do the job?

Appreciate any assistance

[jogge]

it would be perfect to cool the diff´s and the center case.

but only do that with thermostat fitted in every system, which allows the oil to warm up quickly. and only if the temp. exceeds 70-80 degress Celius the thermostat open the cooling cycle.

so everything would be fine on street and track use.

i think the temps. of the oil in the diff´s, gearbox and so on should be between 80-100 degrees celsius.

if temps go higer the fluid will become thinner and the system will loose pressure.

Edited August 17, 2010 by jogge

[GOD12A]

Heya all

Sorry for the dig, but what came of this??

I have found the following part numbers for the OEM aus-spec transfer case cooler setup but would love to see a diagram/pic of the OEM setup or anyones aftermarket job!

Mark

[Luke_ENR34]

HPI japan actually make a universal transmission and diff cooler kits but looking around $800 a kit but comes with everything. Should hopefully be able to make your own for less then that.

[GOD12A]

Heya there Luke

Thanks for the info. I've come across some extra info and pics.

To get all DIY, there's a '5R Racing' brand pump that's a rebranded VDO 12v high temperature, low pressure, oil pump with an operating temp to 150deg C. They seem to be a bit over $300AUD on the net, so through usual workshop contacts, I'm sure it'll come down to a bit over $200 for the pump alone. I've read they're available through Repco, but I haven't checked as yet (Rocket Industries etc sell them too, but prepare to be bent over).

Weldon also have a #9200-A oil transfer pump that is made for this application, but obviously $$$ unless you know someone with an Earls account

Some extra pics I've found for future reference:

Remember that being a low pressure system, high pressure hoses and fittings aren't necessary as you'll easily blow >$100 on fittings to make something under the car look fancy (and braided hose/fittings are also heavier than pushlock hose/fittings!!)

Just some extra info for now,

Mark

[Luke_ENR34]

Thanks for that info. Could always try getting a Weldon pump from the states to save abit. Also heard about the VDO pump and may go down that direction according to price.