If you're talking about the 6speed, it wasn't a Hyundai/Mitsubishi transmission. It was manufactured by Aichi. Hyundai didn't even service the 6 speed so they just swapped out new ones if there was a problem. I heard a rumor that they would send cores back to Aichi to be refurbished and recirculated.

So with that I believe Hyundai can't source parts for it. You'll have to try Aichi for replacement parts instead. The Aichi MFA60 transmission only came in a handful of cars such as the Nissan Maxima SE-R Spec-V and I believe one of the Mitsubishi Evos had it as well.

That's all I have so far. I've got a 6 speed on the bench I intend to rebuild so I'll be sourcing bits in the future.

 

Well, I was able to source parts for it a couple years ago, but i didnt consider them limited at the time. I as well have an extra 6spd sitting here just in case. I foresee shims being an issue as well. Fortunately everything was still within spec when I installed the LSD. Looking at it now, I think i got super lucky

 

I've heard from a few people that you can use Nissan synchro's since the 6 speed is Nissan based.

 

yeah theres a handful of cars. Problem is, those cars are also almost 20 years old now. If the parts arent discontinued, they will be as well. At the end of the day, somebody is going to have to start making these, or adapting internals from another transmission.

Heres an interesting thread i found about it

Aftermarket gearsets, built 5 speeds, 6 speeds, etc. - Maxima Forums

Supercharged/Turbocharged - Aftermarket gearsets, built 5 speeds, 6 speeds, etc. - OK I?ve been sitting on this information and these parts for quite a few months now because I wanted to get things up and running before posting so I don?t look like a jackazz, but I?m sufficiently positive that...

maxima.org

 

That's a thread I've refered back to over the years for some excerpts on the 6 speed. Unfortunately it applies almost exclusively to the Nissan Aichi 5 speed. Those gearsets they talk about will only fit their 5 speed.

The Nissan 6 speed gearsets will fit our case with some modification. We can toy around with FD ratios using OEM Nissan parts but some of those are no longer available. I'm sure that the synchros would still fit despite the shaft lengths differing a little bit.

 

What do we know about the MFA80?

 

I don't have much info on the MFA80. With what little Googling I did I found it came from the Mitsu Evo. I do see that it's listed with the MFA60 with a slash so they must have some similarities.

Here is a very obscure find from a Japanese performance bulletin board: Ｂ級グルメと雑談の部屋 (needs Chrome to auto-translate)

Presumably the MFA80 is a MFA60 packaged for use with the Mitsubishi 4G6x series motor. Different bellhousing but the internals are rumored to be the same. @Rushking19 was it the MFA80 you had mentioned to me once before out of the Evos?

 

Yeah that's the transmission I was talking about but I never knew the MFA60 was directly listed with the MFA80 transmission on Wikipedia. Here's two pictures from when I was doing my obx lsd swap and then two pictures of the inside of the Evo 6 speed transmission.

 

Im assuming thats the evo 8/9 6spd from the MR? If thats the case, synchrotech makes carbon coated synchros for that transmission. Ive done a ton of business with them over the years rebuilding honda transmissions. Ill give them a call and see about sending them the mainshaft and countershaft assemblies to compare parts.

 

They certainly look very similar

 

So, looking at a parts diagram of an 06 MR, it shows the same type of key/hub/spring setup found in our transmissions. We might get lucky with this... I dont know if gear sets will work out, but Id certainly settle for being able to rebuild. The MFA80 is supposed to be stronger, but i suspect it might simply be case design for strength having to do with AWD.

 

I heard a few maxima guys have custom fit a Evo 6 speed gear set in their transmission which us interesting since some of the maxima transmission parts fit are transmissions.

 

Thanks for the pics Rushking19! That gives us hope!

I think there are some subtle differences on the Nissan variant that make a direct swap more difficult for us. The shaft lengths are a bit different according to @brownnote here:

Source: Nissan gear mod... complete... (needs the Chrome photobucket fix extension to view photos)

hyundai pinion w/1-6 gears vs. nissan pinion

pinion length difference (nissan pinion is the shorter one)

There is a caveat to the shorter pinion length. The 6th gear contact is around half as much as it should be. 6th gear basically becomes a cruising gear so you can't do a boosted or NOS pull in 6th or you'll grenade your transmission:

Source: Nissan gear modded 6 speed tranny w/lsd

The only caveat is that the gear contact on the 6th gear is 1/3rd of stock due to the necessary machining, so I would try not to drop the clutch and spray nitrous at the same time in 6th gear ha ha ha. Seriously though, I have boosted many times in 6th gear, but honestly, 6th gear is really only good for me and my particular setup at around 72-75 mph. With my lower comp. motor, and overdriven accessories, the 6th gear is a super-overdrive gear that is great for 75mph and above, maybe less on stock compression... 70 or above. But 5th gear is right around where the stock 6th is, so it is all great!

However, if you swap the entire gearset rather than just the FD and associated pinion, that should alleviate the 6th gear problem.

 

Thanks for the pics Rushking19! That gives us hope!

I think there are some subtle differences on the Nissan variant that make a direct swap more difficult for us. The shaft lengths are a bit different according to @brownnote here:

Source: Nissan gear mod... complete... (needs the Chrome photobucket fix extension to view photos)

hyundai pinion w/1-6 gears vs. nissan pinion
View attachment 137973

pinion length difference (nissan pinion is the shorter one)
View attachment 137974

There is a caveat to the shorter pinion length. The 6th gear contact is around half as much as it should be. 6th gear basically becomes a cruising gear so you can't do a boosted or NOS pull in 6th or you'll grenade your transmission:

Source: Nissan gear modded 6 speed tranny w/lsd



However, if you swap the entire gearset rather than just the FD and associated pinion, that should alleviate the 6th gear problem.

Now for the evo transmission idk how long the shaft is but I know it needs work to fix in the maxima transmission. So idk how it could be compared to the tiburon transmission shaft length.

 

So what they are saying is that the gears interchange with our pinion? That means the synchros should work too

 

Ok I talked to Andy at synchrotech today. They basically said they dont have the time to sort about the parts, however he told me he would sell me the evo 6spd synchro set, and a collar at $377. Told me if they were undamaged and not all oiled up, they would accept a return as well if they didnt work out.

Our spare transmission is still in the vehicle, and its going to be a bit before we can get it in the shop to yank it out. Does anybody want to tackle this before us?

AND, I did a quick search for a 2006 evo 6 spd and i found a few CORES going for $750-1000..... why are the cores so expensive... Anyways, my goal was to tear one of those apart and start checking gears.

I also did a quick search for the guys in the industry who are building evo transmissions. This shop came up more than once Home - TEAM RIP

 

I'd be interested testing it out but I'm several weeks probably months away from rebuilding a transmission. Still need to pickup an LSD like the OBX and upgrade its hardware. I do have a 6 speed on the bench but it's buried until I finish pulling my motor to overhaul the motor and do a clutch job.

Cores are probably expensive because JDM is generally expensive all around. I'm sure a lot of those MFA60/80 were destroyed in the cash for clunkers program. They literally poured a cement mixture into the motors and transmissions before sending them off to the crusher to ensure parts weren't salvageable. That program was a complete waste to the used parts market and as an unintended result caused what's left of the used vehicles from the pre-GDI era to skyrocket in value.

 

And here I was eventually planning on getting mine rebuilt.

 

@Faulcun

Do you have the part numbers from the Hyundai dealer when you first contacted them for syncros? I was shopping for parts and came across what appear to be syncros but most of them are labeled as ring baulks. The only syncro may be 1st-2nd while the rest may be known as ring baulks for some reason.

Reference site: Transaxle Gear (6SPEED MTA) - 2006 Hyundai Tiburon Old Body Style

43350-39900 Genuine Hyundai 1ST,2ND Assembly-Syncronizer

Genuine 43350-39900 1ST,2ND Assembly-Syncronizer fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4335039900 for $118.20.

www.hyundaipartsdeal.com

43374-39900 Genuine Hyundai Ring-Baulk 3RD,4TH

Genuine 43374-39900 Ring-Baulk 3RD,4TH fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4337439900 with great deal.

www.hyundaipartsdeal.com

43384-39900 Genuine Hyundai Ring-Baulk 5TH,6TH

Genuine 43384-39900 Ring-Baulk 5TH,6TH fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4338439900 for $48.53.

www.hyundaipartsdeal.com

43388-39900 Genuine Hyundai Ring-Baulk Reverse

Genuine 43388-39900 Ring-Baulk Reverse fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4338839900 for $43.72.

www.hyundaipartsdeal.com

These parts appear to be in stock. We may still have OEM options if these are correct.

 

@Faulcun

Do you have the part numbers from the Hyundai dealer when you first contacted them for syncros? I was shopping for parts and came across what appear to be syncros but most of them are labeled as ring baulks. The only syncro may be 1st-2nd while the rest may be known as ring baulks for some reason.

Reference site: Transaxle Gear (6SPEED MTA) - 2006 Hyundai Tiburon Old Body Style

43350-39900 Genuine Hyundai 1ST,2ND Assembly-Syncronizer

Genuine 43350-39900 1ST,2ND Assembly-Syncronizer fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4335039900 for $118.20.

www.hyundaipartsdeal.com

43374-39900 Genuine Hyundai Ring-Baulk 3RD,4TH

Genuine 43374-39900 Ring-Baulk 3RD,4TH fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4337439900 with great deal.

www.hyundaipartsdeal.com

43384-39900 Genuine Hyundai Ring-Baulk 5TH,6TH

Genuine 43384-39900 Ring-Baulk 5TH,6TH fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4338439900 for $48.53.

www.hyundaipartsdeal.com

43388-39900 Genuine Hyundai Ring-Baulk Reverse

Genuine 43388-39900 Ring-Baulk Reverse fits 2001-2008 Hyundai Tiburon. HyundaiPartsDeal offers 4338839900 for $43.72.

www.hyundaipartsdeal.com

These parts appear to be in stock. We may still have OEM options if these are correct.

Yeah those are the same numbers I had acquired online, and the listing name was also the reason I needed to verify. I dont know if he looked at this list of stuff and it all showed discontinued and he dismissed the whole thing, or he didnt know what to look at to begin with. We all know parts guys who have never worked on cars before, let alone capable of recognizing the difference between internal manual transmission parts.

My plan was to take those part numbers and go back and specifically ask for availability on each one. Just havent had time to do it yet.

However, if i can get my hands on a set of carbon coated synchros... Id rather do that

 

Ok guys. Upon my inquiries with the dealership here this week... they told me that the synchros are no longer available for our transmissions.

I have not verified yet with specific part numbers, I left it to him to look it up while I was standing there. Im going to verify this information tomorrow.

But the bigger question is now, what options do we have if/when these parts are discontinued? Theres a real risk of damaging drivetrain components for some of us who end up pulling more power out of our cars. I think as a community we're going to have to work out a solution to this

It wasn't a Hyundai/Mitsubishi transmission, if you're talking about the 6-speed. Aichi was the company that created it. Hyundai didn't even service the 6 speed, so if there was an issue, they just replaced it with a new one. I heard they were going to ship the cores back to Aichi to be repaired and recirculated. As a result, I believe Hyundai will be unable to obtain components for it. You'll have to look for new components in Aichi instead. The Aichi MFA60 gearbox was only available in a few automobiles, including the Nissan Maxima SE-R Spec-V and one of the Mitsubishi Evos. So far, that's all I've got. I have a 6 speed on the bench that I plan to restore, so I'll be looking for parts in future

 

You all seem to be 6 cylinder 6 speed guys, so maybe this is not interesting... but I put a turbo on a 2.0L. I later bought a stock C5 Corvette. My tiburon went exactly as fast in the quarter as my vette. But the Korean Corvette was a TRANSMISSION EATER!!!

 

You all seem to be 6 cylinder 6 speed guys, so maybe this is not interesting... but I put a turbo on a 2.0L. I later bought a stock C5 Corvette. My tiburon went exactly as fast in the quarter as my vette. But the Korean Corvette was a TRANSMISSION EATER!!!

Its all interesting bro!

What kind of failures did you experience? It looks like that closest transmission broke the case... How much power were you putting down?

Id be afraid to launch this car anyways seeing as theres little to no support for the transmissions. Im hoping they hold up better while already rolling. Ours is built for corners anyways. Actually all my cars are. While fun to watch, straight lines bore me when im behind the wheel

 

Yup, everything I've read about the 2.0 5 speed is that it won't hold power. What 427troy needs is one of those ultra rare Aichi 2.0 6 speeds out of Korea with a Cusco LSD if available for the 6 speed.

As per usual 427troys reply is off topic and he'll disappear without any response for weeks or months.

 

I don't think the 6 speed had the cusco lsd option, importing those transmissions get pricey.

 

@Faulcun @EpicRaptorMan

Great news! We've got word from somebody in the Facebook groups that rebuilt their Aichi MFA60... He says that the SYNCHROTECH EVO 8/9 MR (6 SPEED) CARBON SYNCHRO SET will work. However, 3rd gear is a 2 piece synchro inside of the MFA80 which doesn't fit our gearset. He found that an additional 4th gear synchro from the MFA80 will work in 3rd's place because they are the same in our gearset. I censored his name in case he doesn't want his name out there on the internet.

 

@Faulcun @EpicRaptorMan

Great news! We've got word from somebody in the Facebook groups that rebuilt their Aichi MFA60... He says that the SYNCHROTECH EVO 8/9 MR (6 SPEED) CARBON SYNCHRO SET will work. However, 3rd gear is a 2 piece synchro inside of the MFA80 which doesn't fit our gearset. He found that an additional 4th gear synchro from the MFA80 will work in 3rd's place because they are the same in our gearset. I censored his name in case he doesn't want his name out there on the internet.

View attachment 139583

HEY! Thats fantastic! This info needs to be saved.

On a side note, ive been thinking about doing an awd conversion with either a crv or evo transmission. Fun fact, the crv transmissions can be converted to a 6spd by using a tsx 6th gear. Same trans housing, just with a spacer in place of the 6th gear on the stock 5spd.