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Old 06-29-2009   #1
mcfly
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Default BNR34 Getrag Into Your BNR32

In order to swap a r34 6 speed getrag into your bnr32 you will need;

R34 Getrag Box
R34 Pull Clutch/Flywheel or any aftermarket r34 clutch and flywheel
R34 Front Prop
R34 Front half of rear prop and rear half or bnr32 prop
R34 Shifter
R34 gear box cross member+mount modified to fit r32 chassis or a custom bracket made to fit using r34 transmission mount.

To keep the mechanical speedo the BNR32 has you take the speedo pickup in the bnr32 transfer case and transfer it into the hole on the r34 transfer case. You cannot swap transfer cases because they have a different bolt pattern.

Keeping the 4.111's makes for a fun drive, I suggest leaving them in there.
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Old 06-29-2009   #2
Ryan
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Default Re: BNR34 Getrag Into Your BNR32

Quote:
Originally Posted by mcfly View Post
In order to swap a r34 6 speed getrag into your bnr32 you will need;

R34 Getrag Box
R34 Pull Clutch/Flywheel or any aftermarket r34 clutch and flywheel
R34 Front Prop
R34 Front half of rear prop and rear half or bnr32 prop
R34 Shifter
R34 gear box cross member+mount modified to fit r32 chassis or a custom bracket made to fit using r34 transmission mount.

To keep the mechanical speedo the BNR32 has you take the speedo pickup in the bnr32 transfer case and transfer it into the hole on the r34 transfer case. You cannot swap transfer cases because they have a different bolt pattern.

Keeping the 4.111's makes for a fun drive, I suggest leaving them in there.
Thanks again for this. I would love to do this when the time comes.
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Old 07-03-2009   #3
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Default Re: BNR34 Getrag Into Your BNR32

ahh nice, i've being considering going this route. I forgot exactly what was needed.
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Old 07-05-2009   #4
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Default Re: BNR34 Getrag Into Your BNR32

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ahh nice, i've being considering going this route. I forgot exactly what was needed.
that would be badass if you did this nate, let me know if you do. i want to do this down the road too.
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Old 07-05-2009   #5
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Default Re: BNR34 Getrag Into Your BNR32

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that would be badass if you did this nate, let me know if you do. i want to do this down the road too.
One thing at a time, get the car first lol. Honestly I have no beef with the R32 5 speed, the gearing is really good. Its just my synchros are shot and 3rd gear wont like 600hp much.
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Old 07-05-2009   #6
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Default Re: BNR34 Getrag Into Your BNR32

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One thing at a time, get the car first lol. Honestly I have no beef with the R32 5 speed, the gearing is really good. Its just my synchros are shot and 3rd gear wont like 600hp much.
hehe, most of my spare time is spent here, gtrc, and thinking about allll the mods im going to do to the car when it comes. I have my paychecks for the next 10 years planned out already.
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Old 08-23-2009   #7
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Default Re: BNR34 Getrag Into Your BNR32

Any idea of Top Speed in a BNR32 with the Getrag + 4.11's ? (compared to the 5 speed that is...as I don't know the gear ratios off hand).

Are both 5th and 6th overdriven in the Getrag, with 4th as 1:1 ? or is 5th 1:1 in the Getrag ? ....with 1st being a 'tractor' type gear......lol
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Old 08-23-2009   #8
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Default Re: BNR34 Getrag Into Your BNR32

1st in the getrag is steep, gets you off the line fast.
5th is 1:1

with stock 225/50/16 you will do 182 mph in 6th, 5 speed box would do 191 in the same fashion. 8k rpm.

getrag ratios
1st 3.827
2nd 2.360
3rd 1.685
4th 1.312
5th 1.000
6th 0.793

r32/33
1st 3.214
2nd 1.925
3rd 1.302
4th 1.000
5th 0.752
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Old 08-27-2009   #9
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Default Re: BNR34 Getrag Into Your BNR32

What would the overall cost for something like this be? It sounds very ineresting and will be seriously considered when the time comes for me to step up to the GTR plate.
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Old 08-27-2009   #10
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Default Re: BNR34 Getrag Into Your BNR32

likely about 8g
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Old 08-28-2009   #11
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Default Re: BNR34 Getrag Into Your BNR32

That's not unreasonable. The other day I was told that if you need to do any work on the internal's of a getrag gear box it requires puting the box in an oven to open it up,any truth to this?
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Old 08-28-2009   #12
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Default Re: BNR34 Getrag Into Your BNR32

for that price your MUCH better to get a high end gearset for the R32 box. Getrags are stout, but not indestructible. GTR's break a hell of lot more of them than supras, but its no surprise, AWD breaks shit.
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Old 08-28-2009   #13
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Default Re: BNR34 Getrag Into Your BNR32

I once had a theory that the transfer case put torsional stresses on the case and that is why we break boxes. Because is really is essentially a v160 gear set with a different case.

But the only 6 speeds we can get for a r32 are dog boxes.
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Old 08-28-2009   #14
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Default Re: BNR34 Getrag Into Your BNR32

What typically lets go on the R34 getrag, and when?
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Old 08-28-2009   #15
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Default Re: BNR34 Getrag Into Your BNR32

Quote:
Originally Posted by mcfly View Post
I once had a theory that the transfer case put torsional stresses on the case and that is why we break boxes. Because is really is essentially a v160 gear set with a different case.

But the only 6 speeds we can get for a r32 are dog boxes.
thats possible, but my guess is its more to do with the awd. I mean at crazy high torque levels the supras are gonna be breaking the rear tires loose while the gtr will end up putting a lot more strain on the box under the same conditions.


Personally I love the stock R32 GTR ratios for circuit use. A getrag with the stock R32 4.11's would really get ya going quick. I've been thinking about what to do for my build tranny wise for ages and I still cant seem to make a decision.

Last edited by Bignate; 08-28-2009 at 09:44 PM.
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