Jump to content
SAU Community

Blew Anotha One..

ako299
 Share

Recommended Posts

ako299 Collaborator

ako299

Posted
Posted

hey guys

i just blew anotha gear box in my r32 gtst

2nd one in 3 months..

i have 215rwkw and a exedy brass button clutch with carbonic inserts higher clamp rate etc which probably isnt doing wonders for the 20 box..

so is it time to go the 25 box any other ways i can get around braking them so fast both boxs 2nd n 3rd gear almost no teeth left..

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/
Share on other sites
89CAL Grand Master

89CAL

Posted
Posted

i didnt think i treated it to bad but i guess the 20 boxs r just crap! pretty sure they r just a vl box with double syncros?

They are similar to the MF5 (I'm pretty sure is the code for it) in the VL's but there are slight differences. double synchros in 1st and 2nd and something else i think.

I had a mate shear the input shaft in his 20 box doing a launch at the drags with a button clutch, only had 190rwkw as well so a harsh clutch is probably not great for the box haha

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5732490
Share on other sites
blind_elk Grand Master

blind_elk

Posted
Posted

i didnt think i treated it to bad but i guess the 20 boxs r just crap! pretty sure they r just a vl box with double syncros?

In my experience, Nissan gearboxes are pretty well bullet proof. You really have to be brutal to it to break it.

I'm pushing 180 AwkW through my R32 GTS4 gearbox (RB25DET driving through an Exedy HD clutch), and it has never even looked like failing.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5733033
Share on other sites
Birds Grand Master

Birds

Posted
Posted

Luck of the draw and driving style...but they are weak, and they are 20 years old now...go get an RB25 box. There's a reason Nissan put a bigger box in their car with 187kw, instead of just using the RB20 box.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5733091
Share on other sites
bubba Grand Master

bubba

Posted
Posted

I've broken two of them but that was just input shaft bearing failure due to too many 2nd gear clutch drops, nothing as catastrophic as what you have done!

Going to the RB25 box was awesome though, takes all the abuse I deal and just shrugs it off.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5733874
Share on other sites
GTR+450hp=no.licence Explorer

GTR+450hp=no.licence

Posted
Posted

I had an R31 drifter with a RB20 turbo with the same clutch as yours, When the stock gearbox blew, i upgraded to one out of a R33 and the ratios and overall feel were so much better. Definately spend the bit extra and upgrade if you're giving it, the only problem i had was the speedo is different and i needed to use a speedo drive out of a navara or something.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5733997
Share on other sites
bubba Grand Master

bubba

Posted
Posted

the only problem i had was the speedo is different and i needed to use a speedo drive out of a navara or something.

That's not a problem, just a part of the conversion process - plenty of info on here from myself and others that have done it.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5734003
Share on other sites
Birds Grand Master

Birds

Posted
Posted

well i actually thought it was because you had a button clutch. those things really bite and can shock your gearbox something rude.

It is definitely a factor, clutch is supposed to be the weak point in the drivetrain. Upgrade clutch = shift stress onto gearbox and diff.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5737305
Share on other sites
bubba Grand Master

bubba

Posted
Posted

yeh i new the clutch was a big factor in it.. well i went and got a 25box last nite with the slave cylinder and whole drive shaft.. so we r going to start the conversion tomoro nite.. see how it goes

Make sure you've got a welder and some flat bar handy.

Link to comment
https://www.sau.com.au/forums/topic/358832-blew-anotha-one/#findComment-5740738
Share on other sites

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


  • Latest Posts

    • TurboTapin
      R32 GTST - 600KW+ RB28/CD009 Build

      By TurboTapin · Posted

      Driveline vibration is resolved. I ended up loosening all my engine mount and trans mount bolts, giving it a good shake then retightening everything and it's gone... Let's just say I was surprised that fixed it.  I've been happily driving it around again but unfortunately put zero time into my direct port/constant pressure WMI setup. I'm on vacation next week, so I'll try and finalize it then.  On a different note, I spent all week fuel/ignition mapping 2x 216L V16 engines. Turbo's were burning glycol and we swapped them out for larger units. We also had planned emissions testing on site, so I figured I'd be there the same week to use their instrumentation and massage any emissions issues out if needed. This was a first for me. Fuel management is similar in certain ways to automotive (i.e air density as load variable) but very different in others. It's all PLC based and AFR's are controlled by air and not fuel. They use a control valve between the turbo and air manifold to control pressure which in turn controls AFR's. Due to this, target AFR tables supplied by the OEM are in pressures and not mass which really through me off. They use air pressure vs fuel pressure tables. I also relied on an O2 concentration sensor the emissions team had in the exhaust. Ignition timing was also all over the place and we were losing a fair bit of power. They're now happily sitting at 16-40BTDC depending on load. We were making about 1600kw at 900rpm at 90% load. Engines were running a lot smoother as well.    
    • Duncan
      1992 R32 GT-R Race Car

      By Duncan · Posted

      heh, aint no R32 ever meeting modern targa cage rules unless the driver is veeeery short OP, good luck with the sale, since its already in the land of freedom I'm sure you will find a good buyer.
    • Duncan
      Oil pan for RB25DET NEO Stagea "version"

      By Duncan · Posted

      meh, it was a good video, clear about the issue and how he dealt with it. A bit heavy on the RTV and very brave to put an RB in anything without rebuilding it first, but otherwise I thought it was good Dose, I'm not sure that having the pickup forward is a big issue; yes of course the oil could shift under brakes but the sump should never be empty enough for that to be a problem (unless you also have a higher volume oil pump, and that oil can't return from the head to the sump quickly enough)
    • MBS206
      Starting again

      By MBS206 · Posted

      I can donate $100 to your upgrade fund. So long as you can donate the IC7 my way....
    • MBS206
      Starting again

      By MBS206 · Posted

      I'd love a Haltech ECU, and Haltech 10 dash. Was having a chat with Rob and Andy @ Haltech when Rob put one in his MR2. First one I'm kind of interested in too, as you can dim it RIGHT down. Andy was saying bright dashes is one of his peeves too!
×
×
  • Create New...