Jump to content
SAU Community

Need Gearbox Help Asap

tm_r33
 Share

Recommended Posts

tm_r33 Experienced

tm_r33

Posted
Posted

hi all... took the gearbox out of my 33 as it was locking me out of 3rd and 4th and felt pretty shagged. upon inspection it is evident i will need 3rd 4th and 5th gear dogs. will need syncros for those gears. and then a few minor things.

as you may know. buying 3rd is simple enough... buying 4th isnt, because 4th comes with input shaft and other parts as a gear set... and to get the syncro for 5th you need to buy the reverse gear which only comes as a gear set blah blah blah and yes it added up to well over $3k for the parts from nissan... probably closer to 4k with bearings seals and gst lol.

so i went back to the workshop and soon located a z31 turbo 5 speed box for $1000...... how does this compare to rb25 box....????

i also located a z32 turbo 5 speed box for $1500... which i know is superior to rb25 box.... but does it bolt up to rb25/rb30...??? or do i need bellhousing adaptor????

and yes i know i could just buy another rb25 box but if i was destroying them with my rb25 at the track i dont think they will last long with the new 25/30 setup thats ready to go in when i find a box!!!

im really keen to buy the z32 box as i know its stronger than r33 box and its only about same price as another 33 box. will it fit in the floor tunnel of 33 gtst???

thanks guys.

Link to comment
https://www.sau.com.au/forums/topic/366382-need-gearbox-help-asap/
Share on other sites
tm_r33 Experienced

tm_r33

Posted
  • Author
Posted

im now looking on some other forums and reading that z32tt box is nearly identicle to 33gtst box and there is no strength difference???

and that both are pretty much just a rwd version of the 32 gtr box.

do i buy z32 tt box??

33gtst box??

or try to convince bank i need another 10 grand for my car to buy a ppg gearset which i doubt they will lend lol

tm_r33 Experienced

tm_r33

Posted
  • Author
Posted

after a day of litrally looking at seperated boxes and speaking to a few people and a helpful pm from another member i can conclude that... 5speed gtr, 33gtst, z32 are all the same internally. identicle.

they all just use different bellhousing and extension housing and of course gtr is setup for 4wd application. (z32 has slightly different shifter setup i think but no real drama)

z31 box i knew was single syncro so assumed it was different and with confirmation from a forum member and an outside source i can confirm it is like the vlt box.

thread can be closed unless anyone has anything to add.

cheers. james

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kapr
      RB20DE NEO smallbox clutch.

      By Kapr · Posted

      For once a good news  It needed to be adjusted by that one nut and it is ok  At least something was easy But thank you very much for help. But a small issue is now(gearbox) that when the car is stationary you can hear "clinking" from gearbox so some of the bearing is 100% not that happy... It goes away once you push clutch so it is 100% gearbox. Just if you know...what that bearing could be? It sounding like "spun bearing" but it is louder.
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      Yeah, that's fine**. But the numbers you came up with are just wrong. Try it for yourself. Put in any voltage from the possible range and see what result you get. You get nonsense. ** When I say "fine", I mean, it's still shit. The very simple linear formula (slope & intercept) is shit for a sensor with a non-linear response. This is the curve, from your data above. Look at the CURVE! It's only really linear between about 30 and 90 °C. And if you used only that range to define a curve, it would be great. But you would go more and more wrong as you went to higher temps. And that is why the slope & intercept found when you use 50 and 150 as the end points is so bad halfway between those points. The real curve is a long way below the linear curve which just zips straight between the end points, like this one. You could probably use the same slope and a lower intercept, to move that straight line down, and spread the error out. But you would 5-10°C off in a lot of places. You'd need to say what temperature range you really wanted to be most right - say, 100 to 130, and plop the line closest to teh real curve in that region, which would make it quite wrong down at the lower temperatures. Let me just say that HPTuners are not being realistic in only allowing for a simple linear curve. 
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I feel I should re-iterate. The above picture is the only option available in the software and the blurb from HP Tuners I quoted earlier is the only way to add data to it and that's the description they offer as to how to figure it out. The only fields available is the blank box after (Input/ ) and the box right before = Output. Those are the only numbers that can be entered.
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      No, your formula is arse backwards. Mine is totally different to yours, and is the one I said was bang on at 50 and 150. I'll put your data into Excel (actually it already is, chart it and fit a linear fit to it, aiming to make it evenly wrong across the whole span. But not now. Other things to do first.
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      God damnit. The only option I actually have in the software is the one that is screenshotted. I am glad that I at least got it right... for those two points. Would it actually change anything if I chose/used 80C and 120C as the two points instead? My brain wants to imagine the formula put into HPtuners would be the same equation, otherwise none of this makes sense to me, unless: 1) The formula you put into VCM Scanner/HPTuners is always linear 2) The two points/input pairs are only arbitrary to choose (as the documentation implies) IF the actual scaling of the sensor is linear. then 3) If the scaling is not linear, the two points you choose matter a great deal, because the formula will draw a line between those two points only.
×
×
  • Create New...