djvoodoo

Speedo is out by about 12-15% I.E - If doing a road speed of 100km, the speedo is showing about 115km. The 33 GTR speed sensor is almost impossible to come by. I was lucky enough that someone on FB marketplace was selling an entire gearbox, and i just politely asked to buy the speed sensor off him. I have not installed it yet though.. I thought about the speedo correctors, but heard some not so great things about the Jaycar unit. Lucky for me, i use a Powertune digital dash in the 34 MFD cluster. I have the GPS unit, but the dash also has a speed offset function in which you can choose the offset percentage. So i just bang in an offset of 15% and the digital display shows the correct speed on the MFD.

It's good, but not as good as some people make it out to be on social media. Yes, you can feel the torque come in earlier, yes, it does make the car feel more lively below 4000rpm, and yes, it does feel more responsive, but it's not this 'unicorn' mod. Everyday driving? Below 100km/h on Australian roads, it's worth it. At 110km in 6th gear mine will sit on about 2860rpm. Doing a Motorkhana or a small circuit? Yes, it's worth it. Doing Texas style speed runs? Prob not. Do you use the gears more? Yes and No. Doing 60/70km on most roads, I'm using the gears just like any other Getrag. 80km and above, you use 5th and 6th more often. Absolutely no issues driving with the 33 A-LSD. Didn't change the front diff, only changed the C&P wheel. Some people say to upgrade to a Quaife etc, but i've had no issue with torque steer or having it wander all over the road. The one thing that no-one really addresses is the issue of the Speedo being out. It's either use a speedo corrector, find a 33 gearbox speed sensor, or use an aftermarket display with GPS speedo.

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

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

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.

Pretty self explanatory. Looking for an R33 GTR speedo sensor. Can't buy them new anymore. DM me if you have 1. Thanks

I've been told that the R33 GTR speedo sensor will fit into the Getrag, but you just need to modify the adaptor plug to suit the 34. But in saying this, i've also been told the speedo is still out by 3-5%

Noted and taken on board!

Yep, ok got it now! Took me a while 😵‍💫

Right, not sure if i explained myself correct. So wire in as below? *edit, use accessory power to turn on the unit, i'll prob use the cigarette lighter etc, not pin 29 (ign)

Thanks @GTSBoy - So pretty much i dont need to wire in the "Speedo Out" wire on the Jaycar unit. I.E : 1. Power 2. Ground 3. Pin 19 on 34 cluster to speed input wire on Jaycar unit 4. Leave Speed out wire disconnected. Or ground?

Hi guys. Still trying to find some info. Having replaced my Getrag 3.54 diff ration to 4.11's, my 34R speedo is out. Am planning to use the Jaycar Speedo corrector kit. https://www.jaycar.com.au/speedo-corrector-module-for-cars/p/AA0376?pos=1&queryId=88be0ef7c2dc84f96cf96bd17b61361f&sort=relevance&searchText=speedo Whilst i understand the speed "input" is pin 19, I need to clarify what pin "30" and "31", that being the speedo output, does to the cluster. Jaycar's instructions are: But the 34 cluster has both 2 pulse and 8 pulse output. Ay ideas?

I recently did the 4.11's in the 6 speed Getrag (34 GTR). I already have a responsive setup using a GTX3576 gen 2. I actually agree with you on some of this. YES, It makes a difference, but it's not some magical thing like Motive make it out to be. I still think it's worthwhile, and im glad i did it, but it's not this crazy WOW moment.

Massive thread bump. Anyone know if the speed signal input/output wire (pins 30 and 31) is the same for a 34 GTR ? Have recently changed to 4.11's in the Getrag.

Pretty sure i've posted my graphs in the past on a thread about GTX3576 VS GTX3076 or something. Note - Hub Dyno. So an approx conversion at say 1000 axle rpm speed x 1:1 gear ratio x 3.54 diff ratio (R34 Getrag) = 3540rpm or there abouts for 21+ psi of boost. In the real world, im not sitting there staring at my boost gauge while driving, but i've had -9's in the past too, and i prefer the single.