Out of curiosity what all does that consist of?


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Cost?

What I have seen on even OEM units is the clearances are all over the place. First step I take is to measure and blueprint all the parts and replace any out of Spec. I am working on a supplier of Carbon lined syncros for 5/6 gears. I have built several units with tighter clearances using shims or machining to set proper clearances. Increased detention in the shift rails, and spending the time it takes to assemble all of the parts so that the unit is tight and aligned to handle the abuse of racing or track days. All new seals, bearings are check for run out. I also have been testing with micro polishes on the gear surfaces to improve fluid flow and abrasion resistance.


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What do you charge for this service?


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Parts and labor on a rebuildable unit is around 2k. Very hard sale when a new box is 1600-1800 depending on your hook up.


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Would you be able to change the ratio of 6th gear alone? To something lower. So you could keep the close gears for normal driving then have 6th for freeway cruising at something like 2500-2700 rpm at 80-85mph?

This is understandable simply based on pricing. But when you consider the information you just posted regarding tolerances found on stock units, it seems like a no-brainer to build it properly for a few extra bucks than to buy a new stock unit. Just my :twocents:

:iagree:

https://uploads.tapatalk-cdn.com/201...206880ea56.jpg
I would have to find some donor gears but I have done it before.



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is there an option to weld third gear? at higher levels of power the brazing breaks loose.

I have not seen a broken one yet, but I would not hesitate the weld it and rebalance the assembly.


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Cdoxp800, what is the latest update on the unit in your car.


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that's great, yeah its about 700-750hp the brazing goes, had 2 or 3 old customers that had it happen at the strip. there used to be a gear shop in Australia that sold a laser welded replacement but it was almost $700 for the one gear/shaft.

I've been getting grinding in 2nd gear and crunchy shifting in 3rd. Do you think a rebuild is a good option for me? This is my DD.

I changed my trans oil and differential oil this weekend to MT-85, still grinding, requires double clutch to shift smoothly.

So I read this whole thread but can't find where I can get a hold of these upgraded synchros? I've had my car for 4 years (been boosted for the last 3 years) and it's always scratched if I shift into 5th or 6th too quickly. I've just been living with it but I'd love to find a solution!

Reread Post #46 :twocents:

Question. Is our manual tranny the same as in the 350Z?

Doesn't look like it.
The 350Z MT part numbers start with 32010*****
The 370Z MT part numbers start with 320B0*****

Hey man. The Transmission has been doing GREAT. Been in just over a year now and number track days on it. Still feels very smooth in and out of gear.

I cannot thank you enough for the rebuild. It's been nice not having to worry about it now.

From what I can tell they are the same inside. Both have the same gear ratios.

Gear ratio
1st 3.794
2nd 2.324
3rd 1.624
4th 1.271
5th 1.000
6th 0.794

I lost 5th and 6th. I need a rebuild. Any updates

Seems like one person knows which are the correct syncros but they will not say

Bumping this guy up. Have 5th gear grinds. Would like to get some more info.

It would be nice to know if he has a forged (billet) input shaft for us boosted folks who break them.

Bumping this up.

I have my old transmission apart, lost 5th and 6th. Found the shift fork rod was completely sheared. A few gears were grinding prior. I put a brand new trans from Nissan in however I would like to build my old transmission for high power and reliability as this car is becoming a dedicated competitive drift car.

I have found ZERO information on where to get any upgraded internals available after reading through this entire thread. Some guy from Carver Motorsport or something like that?

The last time Ccraver was on the forum was 6/19.

Someone try to find him on Facecrap... I do know of one guy that got his contact info and actually spoke to him sometime back. But then sold his Z and I never got the contact info :facepalm:

I was working on something but had an issue and the Rona put a complete stop on it. I was going to have gears made too.

These guys might be able to help (they have US based dealers) and I have used their T5 gearsets in my Historic Race car in the past

https://www.ppgearbox.com/

These guys make the axles for my historic race car

Home ⚙ Albins

They'll both require a sample to make a replacement gear.

AUD:USD rate favours the USD at the moment

Bumpity bump!
Old thread I know.... But I'm grinding when shifting hard into second, and 6th grinds when it's cold.
I do my best to baby it currently. I'm running redline MT85 with AmsOil synchro Mesh which has helped quite a lot.
I'm about to boost the poor thing and I'm wondering if there has been any progress on parts or a rebuilder?

T56 swap it

Any word on if this is something we can get yet? My trans shifts slowly between 1 and 2 and 3. It shifts fine when not WOT. I'd like to get a transmission that will hold up to boosted E85 punishment instead of cooking transmissions over and over. Getting it done over the winter is ideal, I'm a Minnesota boy.

Are you still on the factory clutch? If so, this is your problem.

Oh dear lord no. I run a JWT single disk combo rated at 700 foot pounds. I know you're being thorough, but does anyone boost on a stock clutch?

I heard in the Boosted VQs FB group that a guy named Spooler was "working on something" until covid hit. Would this be you?

What JWT clutch are you running that's rated at 700ft.lbs? The one I used to run was only rated at 600ft.lbs. and I assume that was crank torque.

Yeah, I was working on it. I needed a couple of complete broken input shafts. I needed both sides. Unless I break one myself, this is a no go. It will stay on the back burner. Too busy to mess with it right now.

For a fast shift you need to reduce the spinning mass of the clutch. Carbon clutches are your friend but they are expensive. Look at an ATS triple carbon. Call MA-Motorsports.com. Talk to Jon. They can hook you up. It takes a while to get them, they come from Japan.

Are you the guy on Facebook that has been yayaya'ing? If so, it sounds like you need new syncros for 1st, 3rd, and 5th. New transmissions from Nissan are not too pricey. 1800 or so. If I was able to get a billet input shaft made you know just the shaft would cost 1k without install. That stuff is not cheap.

Yes, I brought this subject up in Boosted VQs. It's hard for me.to believe that there isn't a kit available for these transmissions considering the way the synchros fail with boosted applications. I've seen quite a few posts about trans problems over the last number of months that I've been a part of the community. I figured that if I encouraged discussion there too, perhaps it would get some kind of response from someone who had either built a stronger solution, or could point me in the right direction for upgrade kits, or perhaps at least someone I could shop mine to for some modifications since mine is still shifting well and not grinding yet. I've owned 3 of these now, one of which had a new trans put in under warranty. Both the others shifted so much faster than mine is now. Neither of those were boosted though. I didn't warranty this one because an adjuster.would tell me to **** right off as soon as they looked under the car or under the hood. I still don't like the idea of buying a whole new trans to fix a few parts that are wearing... but it seems like it's our only recourse.

The thing is there's an opportunity for someone to make a lot of money making a durable trans or by putting together an upgrade kit for this car... people love boosting them, tracking them, and drifting them. If I was a trained transmission mechanic I'd jump at a chance to start up a company. I really don't think success is "pie in the sky" on this. There is a market for this... it's just waiting for someone to jump on it.

The problem is the folks that want it don't want to pay for it.