6 speed transmission

[Don Corenman]

Is it worth looking for a 6 speed transmission? I have a 91 with 47K and in snap ring range. Just put CTSC on it. I know that only a few of the snap ring range trannys go. What is involved to putting on a six speed vs. a 5 speed?

Any help would be appreciated.

Don

 

[WOODY]

see SOS kit, it has everything you need

 

[NSXROC]

Is it worth looking for a 6 speed transmission? I have a 91 with 47K and in snap ring range. Just put CTSC on it. I know that only a few of the snap ring range trannys go. What is involved to putting on a six speed vs. a 5 speed?

Any help would be appreciated.

Don

I have upgraded my car to a 6-speed. I love it. The car is actually faster after the upgrade and you can feel there's more power in most of the gears.

If you manage to find an used 6-speed tranny, take out your old 5-speed and swap it with the 6-speed. You will need to get a reverse lock device from Comptech when installing a 6-speed. You will need a single disc clutch(Comptech or RPS). And that's all.

 

[NetViper]

I would guess between $5-7,000 to get it done with a used tranny.

 

[nsxtasy]

Changing a '91 from a five-speed to a six-speed reduces 1/4 mile acceleration times by 0.11 second, which is approximately the same benefit as adding 5 horsepower.

 

[NSXROC]

I would guess between $5-7,000 to get it done with a used tranny.

There were many used 6-speed sales in the range of $3,200 to $4,000.

 

[SilverStone05]

Changing a '91 from a five-speed to a six-speed reduces 1/4 mile acceleration times by 0.11 second, which is approximately the same benefit as adding 5 horsepower.

That's five horsepower he didn't have before with his 5 speed. :biggrin:
Not to mention the better reliability and smoother shifting as opposed to his old one.

Get the six speed. It's worth it.

 

[|Adeel]

Do 6-speed gearboxes have short gears available too?

 

[nsxtasy]

I would guess between $5-7,000 to get it done with a used tranny.

There were many used 6-speed sales in the range of $3,200 to $4,000.

Add in labor and you're right at NetViper's estimate.

Get the six speed. It's worth it.

Only if you happen to have $5-7K sitting around and the equivalent of 5 horsepower is worth that huge amount of money to you. You can get a lot better performance for the money with other expenditures; the six-speed is way, way down on the "bang for the buck scale". For that matter, trading a car with a five-speed in for a newer one with a six-speed is probably a much wiser expenditure than retrofitting a six-speed into an earlier car.

But since you're so eager to spend money without any worries, I'll be happy to make some suggestions on things you can buy ME.

Do 6-speed gearboxes have short gears available too?

No. The six-speed gearboxes already have the gears spaced closer together so there is no need to narrow any of the gaps between gears.

 

[nsxinkl]

I have no intention to hijack this thread. But you guys seems to be the rights person to ask the following question.

1. Does any of you know how to convert an auto tranny to a 6 speed tranny?

2. What is the process involved? What are the parts that I have to change and how much will it cost?

3. Can you guide me to any thread, forum, magazine or articles that has covered in detail the conversion from auto to manual tranny?

Thanks guys.

 

[Larry Bastanza]

There were many used 6-speed sales in the range of $3,200 to $4,000.

Really, please tell me where.

Regards,
LarryB

 

[AutoVation]

Add in labor and you're right at NetViper's estimate.

Then add in the clutch and flywheel (OMG it's expensive) for another $1000-$1800.

 

[AutoVation]

Really, please tell me where.

Regards,
LarryB

www.ebay.com (i found mine from Davis Acura listed on eBay for under $3300 shipped with 4k miles on it).

 

[len3.8]

www.ebay.com (i found mine from Davis Acura listed on eBay for under $3300 shipped with 4k miles on it).

When???? How the heck did I miss that one?

Really, please tell me where.

Regards,
LarryB

I have one, that you will see in the near Future, of course it will be to make some mods to it.:smile:
And yes they are hard to find...


Len

 

[MikeC_587]

When I did the 6 speed conversion on my 93, I decided to use a new 5 speed clutch with a Honda NA2 NSX-R Input Shaft - for 6-spd twin disc clutch conversion and a Jun lighten flywheel.

A 6 speed conversion is the only way to go IMHO...

Good Luck...

Mike

 

[1BADNSX]

trading a car with a five-speed in for a newer one with a six-speed is probably a much wiser expenditure than retrofitting a six-speed into an earlier car.

Bingo! This is the rarely mentioned, but one of the best ways to go. You achieve the six-speed, more horsepower, and retained resale value (versus the reduced price of a mod vehicle). I recently made this upgrade going from a 91 to a Zanardi.

Bob

 

[TTony]

When???? How the heck did I miss that one?

About 6-7 months ago I picked it up because it was such a good deal. I'm going to do (or have someone do) the install at the same time as a timing belt change and header install.

 

[JetLagSD]

Don,

I did the upgrade from 5 spd to a NEW OEM 6 spd myself a few years back.

I had a 5 spd J spec (factory short gears) that I sold. It had come w/ an engine I bought that was imported from Japan...but I had no interest in it.

As far as the 6 spd, It certainly is nice to have the 6th gear. As others have mentioned, the gears are similar to having the "short gears" with addition to the tall 6th. But as you have figured, it can be somewhat expensive and depending on what you can get it for, including the flywheel and single disk clutch/ pressure plate etc and a means to lock out reverse while the car is moving forward. This question comes up often, as to how much or how, or is it worth it... I got mine (new 6 spd, flywheel, pressure plate, disk, and throwout bearing) at "fire sale" prices.. I bought the plug and play Comptech reverse lockout (but at a extreme discount), and did the work myself. Not to hard. Then I sold my 5 speed for (well it doesn't matter how much) and I ended up being into the upgrade for $700. Now obviously that is a hard one to ditto... but I have helped several others on this message board get fair prices on their 6spd upgrades too. These days their are more options for input shaft/ clutch choices. Those choices might help keep the price of the upgrade down too.

I liked w/ my OEM 5 spd having the 3rd gear hit 118 (approx) mph on the limiter... If you are going to stay NA the shorter gears make some sense(SP?). If you plan to go w/ forced induction.. you'll probably have the power to pull the taller (5 spd OEM gearbox) gears w/ no problem. And like others mentioned... maybe their are better places to invest your $$ on your NSX for performance.

Arround town, you'll probably not use the 6th gear much. On the freeway... might be a differnt story.. (especially w/ fuel @ $3 + a gallon). Any NEW gearbox will feel nice and tight, which is nice. But the OEM 5 spd is a good unit too.

I like my 6 speed, but I don't think I might make the choice to do it if I hadn't gotten such a great deal.

There are TONS of opinions here... Hopefully some of them might help you make a choice you'll be happy with.

Good Luck

 

[Don Corenman]

Thanks for all the great replys. I just put an SC in my car so I will have to judge what the extra power will do. 6 spd looks like a good option, but only if I need to address the tranny in the future.

Don

 

[Bigglezworth]

I've had the 6spd swap in my 91 for a while and love it. I put in a brand new crate 6spd that I purchased from fellow member on ePay. I find it quite noticeable especially with the type of track we have here locally. I'm not always at the top of the gear or just below VTEC in third and have a happy medium with the 6spd. Also as mentioned, the tall 6th gear is great for those highway excursions. 140km/h and just under 3000RPM. I did 660km on a tank with full kill passing through the mountains in various areas. Driving nice I would have done over 700km on the tank easily.

Change out was straight forward enough when you have all the necessary parts. It certainly wasn't cheap - nor even moderately expensive for that matter. Total cost to me after currency exchange utilizing a used clutch with 3000km and my own labour was just shy of $8,000.00 CDN.

I love it!
Tim

 

[thouchin]

For that matter, trading a car with a five-speed in for a newer one with a six-speed is probably a much wiser expenditure than retrofitting a six-speed into an earlier car.

I disagree with this. Buying a newer car with no roof sucks with respect to performance. You get to keep the manual steering.

And its not just the 1/4 times that is the huge benefit, I want one becuase I do not like being out of the powerband in second gear. That feeling alone is worth the upgrade.
Then there is upgraded diff which is suppose to be a great advantage at the track.

T.J.