andlid Posted July 18, 2012 Share Posted July 18, 2012 After my last outing on track I had gearbox issues (3rd one crunching) left her in 4th most of the times (plenty of torque and power but not much fun). I had issues with syncro (I think) 1st,2nd,3rd driving it in town once so I swapped the clutch fluid (pedal was feeling a bit strange and squeaky). The fluid needed replacing!! So after that I took her for a spin around the block, 1st and 2nd worked fine! (I did an adjustment of the pedal too to make sure it's fully engaging before changing gears). I never tried 3rd since I thought I was sorted. Driving down to Mondello I tried 3rd... crunch... it goes in if you force it (did 2nd time) but it's obviously not going to make the life of the box and better. I'm going to have a look and see if the plate (guide plate?) isn't on properly and see if that makes any difference, I think it's a long shot and I'm looking at two options: 1, New gearbox (second hand on fleebay or the like) 2, Hand the auto in somewhere in Ireland, get the old box out and renovate (strengthen it at the same time) 3, leave it until I leave the gearbox on track? (not very nice for other motors on that particular day...) What do you think? I know there is a revised version of the 350Z gearbox that's got stronger syncros. Quote Link to comment Share on other sites More sharing options...
Freebird Posted July 18, 2012 Share Posted July 18, 2012 Im also in a similar predicament, my 3rd and 4th are just buggered. Clutch feels like it has a decent amount of meat left on it, not changed the fluid or anything though. Perhaps I should, fairly sure my syncros are fubared though I also have that horrible "loose bearing" noise when the clutch pedal isnt pressed, is this something you also have? Quote Link to comment Share on other sites More sharing options...
andlid Posted July 18, 2012 Author Share Posted July 18, 2012 Im also in a similar predicament, my 3rd and 4th are just buggered. Clutch feels like it has a decent amount of meat left on it, not changed the fluid or anything though. Perhaps I should, fairly sure my syncros are fubared though I also have that horrible "loose bearing" noise when the clutch pedal isnt pressed, is this something you also have? hmmm 'loose bearing' I do hear a noise but thought that was normal with lighter flywheel and uprated clutch. ?! Its the clutch fluid I'm talking about, new nissan fluid in her that hasn't traveled many miles either. I do feel the gearbox heating up (almost burning leg) on track. Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted July 18, 2012 Share Posted July 18, 2012 If it's FUBARed synchros that are the issue, then a rebuild is likely only to give you a short grace period before it just happens again. It's the design of the synchros that is poor rather than the materials, so you can't just drop in 'uprated' synchros or anything as simple as that; you'd just be replacing the old ones with new equally badly designed ones. For not much more than a rebuild you could just buy a used CD009 transmission, which was the best one made for the DE cars and has considerably stronger synchros than the earlier boxes. I'm not just flapping my chops either, I actually have swapped my box for a CD009 after weighing up the options, and it is a noticable improvement over the old box. You can still tell it's a 350z (noisey and 'manly') but it doesn't crunch into gear at all, even when cold. DB Quote Link to comment Share on other sites More sharing options...
Dblock Posted July 19, 2012 Share Posted July 19, 2012 Is there not anywhere that can give/make you a strengthened box? Quote Link to comment Share on other sites More sharing options...
Dblock Posted July 19, 2012 Share Posted July 19, 2012 If it's FUBARed synchros that are the issue, then a rebuild is likely only to give you a short grace period before it just happens again. It's the design of the synchros that is poor rather than the materials, so you can't just drop in 'uprated' synchros or anything as simple as that; you'd just be replacing the old ones with new equally badly designed ones. For not much more than a rebuild you could just buy a used CD009 transmission, which was the best one made for the DE cars and has considerably stronger synchros than the earlier boxes. I'm not just flapping my chops either, I actually have swapped my box for a CD009 after weighing up the options, and it is a noticable improvement over the old box. You can still tell it's a 350z (noisey and 'manly') but it doesn't crunch into gear at all, even when cold. DB Remember he is running double the power and torque of you or I. Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted July 19, 2012 Share Posted July 19, 2012 If it's FUBARed synchros that are the issue, then a rebuild is likely only to give you a short grace period before it just happens again. It's the design of the synchros that is poor rather than the materials, so you can't just drop in 'uprated' synchros or anything as simple as that; you'd just be replacing the old ones with new equally badly designed ones. For not much more than a rebuild you could just buy a used CD009 transmission, which was the best one made for the DE cars and has considerably stronger synchros than the earlier boxes. I'm not just flapping my chops either, I actually have swapped my box for a CD009 after weighing up the options, and it is a noticable improvement over the old box. You can still tell it's a 350z (noisey and 'manly') but it doesn't crunch into gear at all, even when cold. DB Remember he is running double the power and torque of you or I. Aware of that; plenty of people running silly power (800whp-ish) on stock transmission. The gearbox itself sems to be built like a brick ****house, it's just the synchros that are a bit pitiful. The only 'off the shelf' replacement gearbox that I know of is the Quaife sequential gearbox for about £8k, which is actually weaker than the stock one and only rated up to 400bhp. Maybe you could get a specialist shop to do some custom machining etc. but you're into silly money then and a CD009 will do the job fine. DB Quote Link to comment Share on other sites More sharing options...
andlid Posted July 19, 2012 Author Share Posted July 19, 2012 Hmmm food for thought there. Quaife has just released a new box that can handle the power :0 Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted July 19, 2012 Share Posted July 19, 2012 Hmmm food for thought there. Quaife has just released a new box that can handle the power :0 ooooo, 750bhp through a sequential box I think you should buy it so we can all see if it's any good DB Quote Link to comment Share on other sites More sharing options...
taffyjason Posted July 19, 2012 Share Posted July 19, 2012 If it's FUBARed synchros that are the issue, then a rebuild is likely only to give you a short grace period before it just happens again. It's the design of the synchros that is poor rather than the materials, so you can't just drop in 'uprated' synchros or anything as simple as that; you'd just be replacing the old ones with new equally badly designed ones. For not much more than a rebuild you could just buy a used CD009 transmission, which was the best one made for the DE cars and has considerably stronger synchros than the earlier boxes. I'm not just flapping my chops either, I actually have swapped my box for a CD009 after weighing up the options, and it is a noticable improvement over the old box. You can still tell it's a 350z (noisey and 'manly') but it doesn't crunch into gear at all, even when cold. DB Where did you find the box? i remember your thread ages ago, Im starting to get irritated by my second gear, some mornings it won't engage at all, ive replaced the oil and added molyslip, it improved generally, but 2nd is still a pig Quote Link to comment Share on other sites More sharing options...
ChrisS Posted July 19, 2012 Share Posted July 19, 2012 In the FS section, still available as of 09/07/12 viewtopic.php?f=32&t=62300&start=0 Think OP should have first bids though. Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted July 19, 2012 Share Posted July 19, 2012 If it's FUBARed synchros that are the issue, then a rebuild is likely only to give you a short grace period before it just happens again. It's the design of the synchros that is poor rather than the materials, so you can't just drop in 'uprated' synchros or anything as simple as that; you'd just be replacing the old ones with new equally badly designed ones. For not much more than a rebuild you could just buy a used CD009 transmission, which was the best one made for the DE cars and has considerably stronger synchros than the earlier boxes. I'm not just flapping my chops either, I actually have swapped my box for a CD009 after weighing up the options, and it is a noticable improvement over the old box. You can still tell it's a 350z (noisey and 'manly') but it doesn't crunch into gear at all, even when cold. DB Where did you find the box? i remember your thread ages ago, Im starting to get irritated by my second gear, some mornings it won't engage at all, ive replaced the oil and added molyslip, it improved generally, but 2nd is still a pig Got it from quite a large general breakers yard (really can't remember who it was) who didn't know what they had. Took me pretty much three days of being on the phone to what felt like every breaker in the UK (and not doing much work) to track down a decent one for a sensible price. I'd recommend avoiding specialist jap car breakers as their prices for CD009s are a lot higher because they know they're rare and 'the one to have'. Also some very expensive and sketchy-looking ones on Ebay that I avoided. Search for a 2006 car rather than a CD009 gearbox and you'll get much better results, but make sure you get a photo of the CD009 sticker on the bell housing before you buy anything. DB Quote Link to comment Share on other sites More sharing options...
andlid Posted July 19, 2012 Author Share Posted July 19, 2012 Going to see what a rebuild will cost, and confirm it'll be a stronger box afterwards. Not buying same syncro again since they'll probably fail after two track days. I'd love to splash out 9k on a full box but don't think so! Maybe next year if my plans come together 950£ is that a fair price buying something 3rd hand? Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted July 19, 2012 Share Posted July 19, 2012 Going to see what a rebuild will cost, and confirm it'll be a stronger box afterwards. Not buying same syncro again since they'll probably fail after two track days. I'd love to splash out 9k on a full box but don't think so! Maybe next year if my plans come together 950£ is that a fair price buying something 3rd hand? Seriously, I looked into a rebuild in great detail and it just isn't worth it. I got a very reasonable quote for £500 to replace the synchros including removal and refitting of the box. However once i'd told the guy what the issue was and he did a bit of research, he came back saying that it would probably only be a temporary fix, and that the new synchros would just go the same way as the old. This fitted with my own research so I believed him. It's unfortunately just the nature of the design that there is nothing you can do to strengthen the synchros; no aftermarket upgrades are available because the materials are as good as they can be already, there just aren't enough cones on the synchros to deal with the power effectively, and there's nothing you can do about that. Fitting the synchros from a CD009 is not possible, literally the only thing you can do is replace with stock synchros and you'll be back to effectively a brand new box with the same design flaw. Re: that box for sale, I don't want to do someone out of a sale but I couldn't in good conscience fail to mention that I got mine a LOT cheaper inc delivery with not many more miles on it. DB Quote Link to comment Share on other sites More sharing options...
andlid Posted July 19, 2012 Author Share Posted July 19, 2012 Cheers dude will a newer box fit straight on? Saw an 07 box there that looked OK. Quote Link to comment Share on other sites More sharing options...
andlid Posted July 19, 2012 Author Share Posted July 19, 2012 Cheers dude will a newer box fit straight on? Saw an 07 box there that looked OK. Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted July 19, 2012 Share Posted July 19, 2012 If the 07 car had the HR engine, the box will not fit on a DE engined car. It needs to be from a car with the DE rev-up engine to be sure it's a CD009, but yes, if it is a CD009 it's straight plug and play with any DE engined car. DB Quote Link to comment Share on other sites More sharing options...
andlid Posted July 19, 2012 Author Share Posted July 19, 2012 If the 07 car had the HR engine, the box will not fit on a DE engined car. It needs to be from a car with the DE rev-up engine to be sure it's a CD009, but yes, if it is a CD009 it's straight plug and play with any DE engined car. DB Sweet might pm you some more Q's! Quote Link to comment Share on other sites More sharing options...
andlid Posted August 4, 2012 Author Share Posted August 4, 2012 CD009 box arriving in Ireland Monday ! Quote Link to comment Share on other sites More sharing options...
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