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Im thinking of putting a new OEM 5th in mine as I would have to re-open the box again...Have you ever heard of a OEM 5th gear snapping in a 700hp car cause this is my goal HP Or even snapping at all. I dont understand why hey made it shorter if it doesnt affect the 1/4 time and slows the top speed. What is the point of it being shorter

is it possible to change something else in the car to get it up in the top speed ? diff ? I have a 320 speedo and Im the type that actually wants it to do that if there was enough road, Even if I wouldnt do it It would stay on my mind like a lie staring at me LOOL. ANd no I dont want to change the speedo i like it :P

You could put a ~3.7 Silvia CW&P in there. That will give you ~11% back on your top end. But it will also lengthen every other gear, which might gay it up a little.

But really, now you are just playing with yourself. There's no real chance of you ever exploring the top end speed difference between the two 5ths, at least not safely. If you tried to do it on Conrod straight you'd almost certainly kill yourself at the chase, and if you tried to do it on a public road, you're insane.

I dont understand why hey made it shorter if it doesnt affect the 1/4 time and slows the top speed. What is the point of it being shorter

The box is 'close ratio' box. That's why first is taller. You don't drop as many rpm between changes.

There's not many places where you would full noise in 5th gear. Eastern Creek main straight maybe and Phillip Island straight. Put at stock 5th gear in, it will be fine. Also, buy the OS Giken centre plate.

yeah just put the standard 5th gear on it, I have done the same and with 600+rwhp had no issues with 5th, makes for a better cruising rev. I certainly wouldn't change the diff, 1st gear is tall enough ! plus you'd have to do the front too !

if you are chasing decent power the centre plate could be good insurance, if I have anymore problems with front to back movement of the main shaft I'll be forced to get one.

I know 2 people that have busted a stock 5th @ Philip Island...

Leave the OS one.

Buggar.

Lucky I kept the OS one. Although I only touch 5th briefly down the back straight at barbagallo...

For the sake of argument wouldn't you just need rev 5th out to, say 8200 to see 300 ?

@R31Nismoid you know the people that broke 5th did they have a center plate in there? I am just wondering if that would of stopped it from braking

Buggar.

Lucky I kept the OS one. Although I only touch 5th briefly down the back straight at barbagallo...

For the sake of argument wouldn't you just need rev 5th out to, say 8200 to see 300 ?

It's more reaching the top end of 4th... Put into 5th, get back on the power - and POP goes the weasel. They are not really designed to be having max load put on them being an overdrive gear which would be more of a problem than the actual RPM.

Thanks......WHere can I get pricing on a Os Giken Centre plate ? Expensive?

Greenline.

I received mine 5 days after payment.

They're roughly $1,000.

Ryan1200 is selling one in the classifieds section for $650 used...

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The signal does NOT go to the ECU first, the wiring goes to the cluster first then the ECU after (or so I'm told).  Problems/Roadblocks I first removed the part from the car on the underside of the transfer case (drain your transfer case fluid/ATF first, guess who found out that the hard way?), and noted the transfer case fluid was EXTREMELY black, most likely never changed on my car. When attempting to turn the gears it felt extremely gritty, as if shttps://imgur.com/6TQCG3xomething was binding the shaft from rotating properly. After having to reflow the solder on my AFM sensors based on another SAU guide here, I attempted to disassemble the silicone seal on the back of the sensor to see what happened inside the sensor; turns out, it basically disintegrated itself. Wonderful. Not only had the electrical components destroyed themselves, the magnetic portion on what I thought was on the shaft also chipped and was broken. Solution So solution: find a spare part right? Wrong. Nissan has long discontinued the proper sensor part number 32702-21U19, and it is no longer obtainable either through Nissan NSA or Nissan Japan. I was SOL without proper speed or mileage readings unless I figured out a way to replace this sensor. After tons of Googling and searching on SAU, I found that there IS however a sensor that looks almost exactly like the R33/260RS one: a sensor meant for the R33/R34 GTT and GTS-T with the 5 speed manual. The part number was 25010-21U00, and the body, plug, and shaft all looked exactly the same. The gear was different at the end, but knowing the sensor's gear is held on with a circlip, I figured I could just order the part and swap the gears. Cue me ordering a new part from JustJap down in Kirrawee, NSW, then waiting almost 3 weeks for shipping and customs clearing. The part finally arrives and what did I find? The freaking shaft lengths don't match. $&%* I discussed with Erik how to proceed, and figuring that I basically destroyed the sensor trying to get the shaft out of the damaged sensor from my car. we deemed it too dangerous to try and attempt to swap shafts to the correct length. I had to find a local CNC machinist to help me cut and notch down the shaft. After tons of frantic calling on a Friday afternoon, I managed to get hold of someone and he said he'd be able to do it over half a week. I sent him photos and had him take measurements to match not only the correct length and notch fitment, but also a groove to machine out to hold the retentive circlip. And the end result? *chef's kiss* Perfect. Since I didn't have pliers with me when I picked up the items, I tested the old gear and circlip on. Perfect fit. After that it was simply swapping out the plug bracket to the new sensor, mount it on the transfer case, refill with ATF/Nissan Matic Fluid D, then test out function. 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