Parts required for 4:11 diff gears in an R34 GTR Vspec (A-LSD)

[djvoodoo]

I kinda have an idea, and there is some bits and pieces on the forums about it.

Looking to do the "Mines R34" diff gearing in the Getrag 6 speed. I want to retain the A-LSD in the Vspec more for the "PuRiTy" aspect of having a Vspec.

Is it a matter of more or less just using the pinion and gears into the existing rear Diff housing?

So: from an R33 or 32 GTR

Front diff pinion/gears

Rear diff pinion/gears

Rear axles/ shafts as the lenghts are different?

Is that basically it?

 

[GTSBoy]

28 minutes ago, djvoodoo said:

Rear axles/ shafts as the lenghts are different?

If you're just changing the CW&P, then nothing else in the diff changes and you don't need to consider the axles (neither the stubs or driveshafts).

I presume that it is nothing more than CW&P required at each end of the car, seeing as it's been done any number of times by others. If it was a circus, you'd hear about it being a circus.

[djvoodoo]

Nice. I was hoping that was the answer 🙂

[Jumbotron]

On 3/9/2023 at 3:38 PM, djvoodoo said:

Nice. I was hoping that was the answer 🙂

Hi did you end up doing the 4.11 gears? Is it only the front and rear CW&P that needs to be changed?

[djvoodoo]

1 hour ago, Jumbotron said:

Hi did you end up doing the 4.11 gears? Is it only the front and rear CW&P that needs to be changed?

I now have 4.11's - But, not a straight fit for the 34 Vspec. The 33/32 CW&P does not mesh inside the 34 A-LSD diff housing (different wheel to pinion thickness)

In order to retain the A-LSD, i bought a 33 Vspec rear diff.

Front is the same across 32/33/34.

 

[Jumbotron]

9 hours ago, djvoodoo said:

I now have 4.11's - But, not a straight fit for the 34 Vspec. The 33/32 CW&P does not mesh inside the 34 A-LSD diff housing (different wheel to pinion thickness)

In order to retain the A-LSD, i bought a 33 Vspec rear diff.

Front is the same across 32/33/34.

 

Thanks for confirming glad it worked out in the end. For the r33 vspec rear diff is it a direct swap, any modifications or r33 driveshafts needed? 

Also do you mind sharing where you sourced parts from? Having trouble finding front CWP or front diff from r32/33

[djvoodoo]

5 hours ago, Jumbotron said:

Thanks for confirming glad it worked out in the end. For the r33 vspec rear diff is it a direct swap, any modifications or r33 driveshafts needed? 

Also do you mind sharing where you sourced parts from? Having trouble finding front CWP or front diff from r32/33

33Vspec diff direct swap. No other modifications needed to the 34 rear end.

Initially, was hard to source the 33 vspec diff at a reasonable price. I found 1 at JustJap.

Otherwise Yahoo auctions, or go through an importer like ImportMonster etc

[Old man 32 GTR]

12 hours ago, Jumbotron said:

Also do you mind sharing where you sourced parts from? Having trouble finding front CWP or front diff from r32/33

If you just want a CWP check out neat gearbox’s in Adelaide, they make replacement CWP for GTR in a number of ratios. Not OEM and not cheap either! 
they do front and rear and they do have a good reputation, I sourced a new rear CWP and sent it to them with my front and had them shot peened, looked good when I got them back. 

[Jumbotron]

37 minutes ago, Old man 32 GTR said:

If you just want a CWP check out neat gearbox’s in Adelaide, they make replacement CWP for GTR in a number of ratios. Not OEM and not cheap either! 
they do front and rear and they do have a good reputation, I sourced a new rear CWP and sent it to them with my front and had them shot peened, looked good when I got them back. 

Yea their stuff looks very nice but man 4k for front and rear CWP 😭

[GTSBoy]

Owners of GTRs cannot complain about the cost of parts.

[djvoodoo]

2 hours ago, Old man 32 GTR said:

If you just want a CWP check out neat gearbox’s in Adelaide, they make replacement CWP for GTR in a number of ratios. Not OEM and not cheap either! 
they do front and rear and they do have a good reputation, I sourced a new rear CWP and sent it to them with my front and had them shot peened, looked good when I got them back. 

Neat don't yet make the CWP for the 34 vspec A-LSD. I know this because i was talking to them about it last year. They were looking to source a Vspec diff to get the measurements