1UZ Turbo 350z gearbox fixed! New synchros and 3rd gear - TurboShed Part 31
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- Опубликовано: 9 сен 2024
- In this video we take our broken 350Z CD008 gearbox and rebuild it with new synchros in 3rd, 5th and 6th. We also re-engineer the known issue of 3rd gear breaking with our own design of reground, hardened, tempered and electron beam welded gear. Hopefully after this work the gearbox will handle the 1000hp engine we are building.... fingers crossed!
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Thank you so much, I bought what I was told was a cd009 with a bad third gear syncro but it turns out it is a cd008 now that I’ve gotten into it. I already had the cd009 syncro so you just saved me $200 and 2 weeks of waiting. I really appreciate this.
Glad I could help
Got exactly that noise on my 350z and 1st and 2nd gear are a struggle, was thinking bearing but obviously syncro. Brilliant video has helped loads. Thanks.
Awesome video mate, very informative and technical. Love this kind of content!
Just purchased my own cd00a although new, seems like i may end up with the same problems. I couldn't justify another 4k$ for the rb 25 box. Keep up the good content
Found your channel as I'm about to attempt to fix a cd08 box for a car in building.
Dam glad I did. Subscribed!
Absolutely awesome!!!
Fantastic engineering
Thank you very much!
Thanks you are the man. Doing mine now after watching this the other day. 5th was broken just like you said. Synchros where amazing on JK40C, thats what im rebuilding. Trans has 50k on it they look beautiful. THIS IS THE TRANS TO GET!!! 5th gear is still brazed and will break with a twin plate clutch at about 400hp.
Man i wish i could buy that reinforced 3rd gear for when mine breaks lol.
Nice video, i do not have a Z car, i have an RX8 that needs 2nd and 3rd gear synchros replaced. Can't find a decent rx8 trans rebuild video, but this is the next best thing i believe. Clear and precise video, last Z video i tried to suffer through on replacing the synchros showed nothing but a bunch of non-related shit.
Have you cross-referenced the 3rd gear part number with the later transmissions and the truck CD009? Maybe Nissan did a fix for the issue you found. Just a thought. I know most guys over here never consider Nissan truck parts when doing builds.
There seems to be 3 different part numbers for the 3rd gear, and it is used on the Fairlady (Z33, Z34), Stagea (AM35), and Skyline (V35). The three are 32260-CD404, 32260-CD014, 32260-CD004, but which are which I don't know. I think the only difference is the number of drive slots for the synchro drive ring and they all are two piece brazed construction, so all break!
Good video .
Thanks for the comment! It's not a big in-your-face drift smokey video, but we felt the technical content was unique on RUclips (don't know of anyone else who's posted a vid repairing a 350Z box) and shows we are finding unique solutions to common problems without just emptying our wallet for a 10 grand Quaife box which is the route many others are taking :-)
Let me start off by letting you know how much i have enjoyed your video. Keep rocking on !!
What i have noticed in the nissan cd series transmission is premature wear on the teeth of the synchro sleeves even before the synchro bulk ring begins to wear.
The parts to rebuild for these transmissions are getting more and more expensive, let alone the time involved to overhaul.
I've replaced more hub & sleeves then i have bulk synchros. And have been able to tig weld the brazed ring onto 3rd gear.
interesting about the tig weld repair, I just went straight to electron beam as I know that is the go-to method for high performance gears. But yes, basically all the CD series synchros are made of cheese, it does matter which gearbox version you have, they are all prone to very early stage wear.
@@Concept5North believe when i say that my ambition of cracking these open and repair came from frustration.
I've been contemplating the idea of modifying a bad spare we have here (cd001) by modifying it to
" slip shift " by machining off every other synchro tooth & synchro slider sleeve tooth and ever other synchro engagement tooth on the gear. This method ive personally never used but have heard of being used in gm t56 and 70's and 80's manual transmissions.
Have you heard of this?
No I haven't, I'm more into engines that gearboxes but we fixed this as it seemed no-one had really sorted the CD*** gearbox problem without just buying a £10k Quaife sequential, which is way out of our means, and not how we roll anyway. The standard synchros are okay, you've just got to accept they need to be changed every 20,000 miles! first gearbox I've ever known that eats internals so badly. Shame, as they are a good strong gearbox other than that fail on the brazed joint and the poor synchro design.
Just wondering if you provide this as a service to rebuild a cdoo8 with the triple cone synchros
I'm after that and an rb25 adapter
Much love great video!
Hi, I'm sorry we don't do commercial work for people, its too much grief for not enough money!
@@Concept5North understable, just to double check first can also be changed out for tripple cone synchros in much the same way, you just didn't need to do it on this one?
I can't remember now, its been so long since I did that gearbox rebuild and video. Haven't touched the gearbox since except for one maintenance oil change.
@@Concept5North trying to buy one for my swap, is it just the cd008 or can the be done on earlier versions
hey mate awesome video!!! I was wondering I'm in a bit of a bind where I'm trying to replace my 5th/6th gear synchro but the ones I have bought (43604-5x00A and 32604-cd020) but neither of them will fit both too wide, cheers and keep up the amazing videos.
Synchros made of cheese 😂 About right 👍🏻
Incredibly re-engineering of a stronger 3rd gear.
Is it possible to discuss this process further with you?
to be honest its been several years since we did this, and I've forgotten most other than the stuff we recorded for the video which I still use for my own reference! You can ask, I think email address is at the end of the video?
Hey #scottparts loved the video. now it has been a year did that 3rd gear work ?
It was May 2019, so over a year now. Its worked great, all we have done is change the gearbox oil since, but the synchros are worn again. 3rd gear works though!
Hi, brilliant video 👍
I was wondering what your thoughts would be on drilling and pinning 3rd gear through the join as a preventative measure to stop it shearing ?
Thanks for the comment! It would be pretty tough to drill for pins, the outer ring is very hard indeed! I just went with the same method that all high performance gearboxes use, and sure enough after 18 months of abuse that gear has never given any trouble at all :-)
Cheers for the reply. I think it’s going to be something I’m going to play about with while I build the box. Would also be handy to find some synchros that weren’t made of cheese too lol
Can these syncros be used in a 2003 cd001?
Hello there. I have a question that maybe you can help me with. There are a total of 10 stainless steel balls in the CD00A. 8 are nuggets in size and the last 2 are smaller. Can you please tell me where the smaller ones go? I’ve looked in the manual and I cannot find their location. Any help would be greatly appreciated! Keep sending videos!
Hey there! Super sick and informative video! Hailing from the states I’m wondering if it make any sense at all to send you my 3rd to have the same work done to it. I picked up a CD009 with a spun braze and figured if it’s cost effective I would love to rebuild and modify it to with stand all the abuse of drifting. Hope to hear from you soon! Also is this something that tig welding may be equivalent to? Obviously electron beam welding is well, you know.
Sorry we don't do subcon work, this was just a fun home project. We used EB welding as it guarantees a full penetration weld with minimal distortion and no effect to the gear heat treat. I don't think a TiG would be as good, but might be worth a try
My questions are: 1. Are there any aftermarket synchros that are better quality that wont wear as the Nissan ones do. Is there anything that can be done to get the synchros to last much longer than the originals? Thank you for any information you can provide.
Good morning Scott! I watched your video about 5 times this morning and it cleared up a lot of questions I had! Awesome content! I just had a couple questions I have an earlier cd and 3rd and 4th synchros are shot. I found this out once I got it in my 240... I just wanted some clarity that part #’s 32620-CD016 (4th) and 32620-cd405 (3rd) for the newer cd’s work on my older cd#1? I was just going to replace everything and not have to worry about filing anything. Just wanted to make sure I’m looking at the right parts before I order.
Thanks a bunch!
Hi, I haven't personally tried fitting later synchros into CD001 box so I'm afraid I couldn't say for sure. Both our gearboxes are later. I'd suggest you take yours apart and compare with the ones in our video and go from there, but I cannot say for sure.
Scottparts Good morning! So I should have took pictures of my gearset when I had the bell housing to get milled but oh well. But pulled it out and tore it down as the where I have the shafts out of the main plate. I haven’t got to press anything off the counter shaft yet but what I can see is 3&4th synchros look black while 1&2 are bronze. I’m assuming the black looking synchros are single/double cone?
Also any tips on how you removed the spacers and hub for 3rd and 4th gear?
On the CD008 the black looking ones are on 5th and 6th (and reverse) and they are single cone, you can see those in the video. The bronze ones are double cone, but as I said, I've never taken an earlier one apart so can't be sure about yours
Scottparts okay! I’ll get a bearing puller and get to work! I appreciate all the help and the awesome video!
Scottparts Hello Sir! Been scratching my head on how to get the inner race from 3 off the counter shaft... did you press/pull from 4th all the way off or am I missing something?
Thank you,
Tyler
Super Video! Thank you.
I have got exactly this problem on the 3 gear where this thing is spinning...
(Original power under the hood).
(Drift car).
2questions:
How do you pull this 3 third and fourth gear off?
I am thinking about rebuilding the whole gearbox to withstand great power (2jz one day).
Where can i get this parts welded the same way you have? I'm from Switzerland...
Thank you so much for your help
To get the gear out of the gearbox you can just copy the video process, or get a copy of the 350Z Nissan workshop manual and follow the steps on there. You need a puller for the reverse gear, and a shop press to get the bearings on/off. Any electron beam welding company should be able to weld it up for you, just search online
Other than machining your own parts and have 3rd welded, is there any other option on the market for a strong 3rd gear? I'm about to rebuild my trans as I've lost 3rd and looking for a solution
In the next 2-3 weeks I'll be dropping that rebuilt box into our car and running it on the track to see how it holds up. Just been too busy over summer. I don't know of anyone else doing what we did, hence we did it ourselves. If it works I already have some blank rings spare here and I'll make a few. If you've got time to wait and can send me your gear I could do it in the batch later this year? Drop me an email if you want to chat about that.
For that third gear fix do you think it will be okay to TIG weld that if I can't get it electron beam welded
You sir are a dead set legend!! I've had nothing but dramas with these trannys.. I could really use your expertise please.
I did a manual trans swap on a 2002 V35 sedan 8 speed CVT model. I've been through 3 gearboxes, CD001- No third gear, CD003- No third gear, and now a ~160km CD009- NVH around 2k rpm in 2nd gear and hectic NVH from 3rd-6th under 2k rpm under load then noise goes away, makes driving in traffic and in general super shit. Also a whirring sound in 5th and 6th on the highway aswell as crunching into 5th unless I go super easy into it.
Do you have any idea on what would be causing this and what parts you'd recommend replacing for a rebuild?
I have dropped the gearbox for the 5th time last week to replace the thrust and pilot bearing just to rule that out, even though I used all new parts on the install and NVH is still there. It has been a really disheartening experience but I am determined to get it right. I'm just a guy who wants to do some skids and go drifting, and I can't sell the car like this also.
I really appreciate the content mate!
Cheers
Thanks for the kind comments! Well the 3rd gear issues, that will be the broken braze joint and all the CD gearboxes use that same gear, so the crazy overpriced CD009 everyone pays too much for, they are no stronger than any other, just the synchros last a bit longer, but not forever. Our car has solid mounted engine and almost solid gearbox, , no carpets or sound deadening, plus twin plate non sprung ceramic clutch so its horribly noisy. Usually the NVH would be too much end clearance and worn synchos. The ones I've taken to bits usually look okay on the bearings but still are noisy.
I've never put a full set of new bearings in to see if that would sort it as we are not too bothered about noise, just strength! I've found the CD gearboxes generally noisy anyway. If you want to send me your broken 3rd gear parts I'm doing a batch of modified ones as per the video.
@@Concept5North thank you for the reply!
I'm running a z1 light flywheel and unsprung full face disc with their pressure plate. There is also noticeably more up and down movement on the input shaft than side to side, not sure if that means anything.
I really do appreciate the response. I'll be looking into disassembling one of the other trans as a practice run after Xmas.
I'll let you know how I go lol.
Cheers mate
Interested in having my gear done if that's something your interested in
Scott do you rebuild gearboxes as a service
Hi, I'm sorry we don't do this work commercially, just for our own fun
Hey mate after some advise, Ive got a cdoo3 with a shot 3rd syncro all other gears are fine bearings seem fine. so im going to replace just that baulk ring and see how It goes.(im a mechanic so revisting it in the future isint the end of the world) So question is due to there being many different revisions of these gearboxes and and the baulk rings what part/ revision would i be best to try and get? is there a difference?
Thanks Adam. great video btw
I'm sorry I dont know for sure, you would have to pull it apart and check against the photos and info in the video
@@Concept5North Hi thanks for you're reply. so my question really was is that according to the info on this video, being a cd003 my gearbox should have a single cone 3rd gear syncro. does this mean I must purchase the baulkring to suit the single cone or is it possible/advisable/worthwhile to upgrade to the double or tripple cone setup out of one of the later gearboxes? I only ask as being in New Zealand parts can take a small while to get here so i would like to order the parts beforehand if thats possible
I cant say for sure. Some of the baulk rings have different numbers of drive pegs as shown in the video. I just cant be sure, you'll have to check yourself I'm afraid.
@@Concept5North Hey so i stripped down my gearbox, as suspected it runs single cone baulk ring on 3rd. so question I wonder is it possible that by replacing my 3rd gear cog I could run the triple cone bulk ring?(as I happen to have this part already) As the single cone cog as is in my gearbox doesn't have the the slots in on the syncro side to drive the syncro intermediate cone + the taper the bulk ring runs against is also the wrong size for the triple cone style syncro. so do you know if otherwise the rest of the cd009 3rd gear cog is dimensionally the same and could be swapped in? great videos btw actual useful information without all the bullshit much appreciated.Thanks Adam
@@adamwsr I'm not 100% sure as I've never pulled a CD009 apart. It still has the brazed joint though, all the CD models do.
Quick question mate, love the video btw amazing clarity, so I'm looking at getting an 005 or later and just swapping the 3rd sync following what you've done in your video. The rest being pretty much the same as 009 except 1st gear... my question is can 1st be done the same way you did 3rd just shave a few mil use the old ring ? Cheers !!!
I don't know as 1st has a different synchro setup to 3rd. Usually 1st is fine though as it doesn't get much use
Do you maybe still have that extra 3rd gear for sale ?
sorry we don't make them for sale, just our own project
How do I get one of those 3rd gears?
drop us an email, the address in the video credits
Can you put synchromesh fluid in a 2010 g37s
I've no idea I'm afraid, I just use normal Nissan recommended gearbox oil
I'm wondering how much will cost this fix :)
We did all this as a one-off so with the costs for machining, heat treatment etc it was not cheap! But still cheaper than any other alternative. It would be around £350 to modify a 3rd gear for someone I guess which will allow a small profit for the work.
Have all the tools just not sure I can do it I've done it on vw before but u make it look easy