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GTR transfer casing questions

Haz33
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Haz33 Apprentice

Haz33

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GTR transfer casing questions

So, I have the weirdest question ever asked...

Does anyone know enough about the GTR transfer casing, to know, whether it could handle over 300HP, using only the front wheel setup ... and can the rear drive be disabled somehow?

I ask, because i'm looking for something to use for a mid/rear engine setup (custom chassis) and would prefer not to use a wrx or volkswagen/audi driveline...

 

any answers? or thoughts?

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https://www.sau.com.au/forums/topic/469758-gtr-transfer-casing-questions/
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GTSBoy Grand Master

GTSBoy

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Ummmmmmm........I fail to see how you could use the GTR gearbox and transfer for a mid-rear setup.  Especially if you want to use the front output.

 

Ignoring, for the moment, the questions of strength, the engine-gearbox-transfer arrangement for the GTR stuff is purely inline.  So if you were wanting to drive something's rear wheels with the front output of a GTR gearbox, then the gearbox would have to be mounted a long way behind the rear axle line.  The driveshaft would have to come out of the transfer case the same as it does in the GTR, forwards to the diff, in the same way that the diff lives in the sump of the RB26.

You are aware the GTR transfer case only has the one, forward facing output, aren't you?

Even if you planned to just use the transfer case, without the GTR gearbox, it doesn't really change anything.  The TX case still needs to hang off the back of a gearbox, still only has the same output shaft.

Addressing the question of strength......actually, there's no point in addressing the strength question.  The answer is yes, or no, depending on a number of things that don't really make sense considering because the idea is fundamentally broken anyway.

Haz33 Apprentice

Haz33

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Now i remember what these forums are like....

 

Let me clear it up...   RB25, + GTR or GTS4 gearbox, GTR or GTS4 sump and transfer casing. Power transmitted through the transfer casing instead of the rear output. And yes, I'm aware that the gearbox goes behind the engine...  and then has a shaft forward again to the transfer case. 

So, not a fundamentally broken idea..   hell, if factory five can do exactly the same thing with a wrx driveline (Yes I know its less complex...   but that's what fabrication is all about) in their 818 kit car, i don't see why it couldn't be done similarly with a GTR/GTS4 driveline...   my only question was on strength..  not on what you think of my idea...

GTSBoy Grand Master

GTSBoy

Posted
Posted

Of course you remember what these forums are like.  With 12 posts and an Integra to your name.

So you want to use a really long engine in the middle of the car, more or less centred on the rear axle line, and a really long gearbox and transfer case at the rear of the car, then send the drive all the way forward to the sump region of the really long engine, where the rear axle line needs to be?  Right?  You do realise that the rear end of this drive line is going to be >1.2m behind the axle line, yeah?

How is this going to be smarter than any of the various Audi/Porsche gearboxes that people already use that are 10x more compact and can handle >300HP?

Haz33 Apprentice

Haz33

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I used to come here all the time, under a different name..

I've owned 31's, I've owned a 32, I've owned a 33...  And yes, now I own an Integra...  Have you decided I'm stupid simply because I drive a Honda...

Yes, it would be a lot of weight (and length) behind the rear axle.. Hence my asking the question, so I know whether its worth trying to fabricate a better solution based on that gearbox...

And yes, everyone does audi/porsche solutions...  they've been done to death...

 

Thanks so much for your help... 

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
1 hour ago, Haz33 said:

Let me clear it up...   RB25, + GTR or GTS4 gearbox, GTR or GTS4 sump and transfer casing. Power transmitted through the transfer casing instead of the rear output. And yes, I'm aware that the gearbox goes behind the engine...  and then has a shaft forward again to the transfer case. .

You mean a shaft going forward from the transfer case to the front diff. No I don't think the drive from the gear box to the transfer case would hold up. The front shaft also is tiny compared to the rear drive shaft and the front diff too is a smaller unit than the rear.

Haz33 Apprentice

Haz33

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Hey, Thanks man, that's kinda what i was looking for....

The whole idea looked a bit awkward, but i thought if it could hold the power it might have been worth tooling around with a bit.

Looks like its back to the drawing board...  Trying to find a decent transaxle without paying for porsche is a pain in the ass...

 

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