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Performance Toyota Transaxle Options

6/22/2018

22 Comments

 
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AR Gear Exchange
If you search the web for any type of Honda gear sets you're garranteed to get plenty of results right away, but for us Toyota owners its always been tough. We've always had to rely on the guys that have done hybrid builds on the forums or the super knowledgeable guys over at Monkeywrench Racing. I have built a couple performance Toyota transaxles for myself, but most of my experience comes from Subarus. I've probably built around 50 transmissions in my time as a technician, and I also keep up with Paul Cangialosi on Youtube (GearBoxVideo). This guy has a ton of manual transmission experience and knowledge, and even has wrote a book on the topic! So I'll be sharing everything I've learned from Paul, my fellow Toyota racers, and my own personal experience here to help others decide on a path for their Toyota transaxle build.

Parts Designation

1) Final Drive Gear

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Mfactory
A Toyota Final Drive Gear consists of 1) the output shaft and 2) the differential ring gear. The final drive gear is essentially the gear ratio between your output-shaft and your wheels, and this ratio is largely responsible for your acceleration and top speed. Most Toyota cars have a 3.9:1FD and that equates to roughly a 145mph mechanical top speed, but in reality thats not attainable due to the speed limiter or low power output. Toyota decides on a ratio that is a perfect mix of fuel economy and acceleration, performance usually being the least of their priorities. So if you swap the 3.9FD for a 4.3, you get an instant acceleration boost and your top speed drops to about 125mph. Your cruising RPM will also increase and the MPG will drop, because now you are spinning the output shaft 4.3 times for every 1 turn of the differential. The higher the number, the quicker your acceleration. Very important.

2) Limited Slip Differential

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ARtrackbox Cusco Type-RS LSD
This right here is the game changer, the one piece that belongs in every racing gearbox. You can have the most expensive build out there with carbon synchros and Kazz gears, but if you dont have an LSD youre going to spin one tire constantly and lose time. A clutch-type limited-slip-differential has a small clutch pack on the end of each axle stub, a cam and wedge blocks in the center, and some preload springs. The springs hold the clutches at a specific preload but still allows some slipage, and when you accelerate the cam forces the wedge blocks against the clutches and locks the wheels together. My personal recommendation is the Cusco Type-RS, I had one for a whole year of autocross and track duty without any issues or noise. I had forgotten how much of a necesity the LSD was untill I did the C60 swap with a open differential. Get the LSD at all costs, or you will regret it.

3) Gear Ratios

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ARtrackbox shafts
In a manual gearbox, gear ratios fill the gap between starting from a stop and doing 70mph on a highway. You cant start off in 5th or 6th gear or you will destroy the clutch from slipping it for so long, likewise you cant go any faster than 35mph in 1st gear or the engine will explode. In most Toyota transaxles the 2-3-4 gear ratios are similar, with variences in 1st and 5th(or 6th) gears based on the accompanied final drive.  Lets take a look at the most common boxes below.

C50 5-speed (Yaris, xA, xB-Gen1, xD)

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C50 ratios (Wikipedia)
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C50 ratios (Cargister)
There are 3 versions of the C50 in US circulation that I know about:
1) The Yaris has a 33mm output shaft, all brass synchros, 3.7 final drive, and a 23 spline differential.
2) The 04-07 Scion xB has a 33mm output shaft, all brass synchros, 4.3 final drive, and a 23 spline differential.
3) The Scion xD has a 40mm output shaft, mostly brass synchros with 3rd being a bi-metal, 3.7 final drive, and a 20 spline differential.

The Scion xB 4.3 FD can be put into the Yaris box with the Cusco LSD, but I've found in this application the highway cruising RPM is rather high. The best option is to use the C59 .725 5th gear with this combination. If you don't drive it on the street, then disregard this step.

The C50-59 have what seem to be "the problem bearings" between 4th and 5th gear, and Ive seen several of these explode and cause gear damage. In every case its the bearing on the output shaft that fails, and I'm going to assume its due to a combination of the open-cage design and the thrust characteristics of helical cut gears. Conrad style bearings are not rated to handle a ton of axial load, so when you are launching or doing burnouts the output shaft bearing is getting hammered from all those forces. If your gearbox starts becoming noisy while driving, don't put off the repair or you'll need a whole new transmission instead of just bearings. You can tell these bearings by their open cage design, they are very different from the superior sealed style C60 bearings.
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40mm output shaft

C52 5-speed (1980's MR2)

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C52 Ratios (Wikipedia)
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C52 Ratios (Cargister)
The C52 was one of the earliest C-Series transmissions, and this results in some road blocks when attempting to upgrade. Not only does the C52 have a completely different input shaft and 4th drive gear demensions, most of the synchronizers and gear cones are unique. All of the shift hubs in this box use the older, C-clip style dog springs instead of the newer individual coil spring/dog setup. Another issue  is that 5th gear is almost useless in this gearbox due to the longer(not swapable) 4th gear, once you shift into 5th at redline there is only 700rpm left until you hit redline again. You can install an LSD, and you can use the C59 5th gear to extend your speed on the straights, but you will shill have outdated parts. I recommend buying a C56 instead since they use the same bellhousing and you get modern, better gear ratios.
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Proprietary Input Shaft, Synchros, 4th gear journal THANKS DAVID B!

C56 5-speed (Celica GT, MR2 Spyder)

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C56 atios (Wikipedia)
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C56 ratios (Cargister)
This C56 seems like the best 5-speed option for sure, you pretty much get a close ratio box with a great final drive from the start. The only thing you need to do to this one is drop in the Cusco Type-RS LSD, set the preload, drop in the good C60 bearings, and seal it up using the bell-housing to suit your application. And like with the C50, if you drive this on the highway a lot get the C59 5th gear to bring down the RPM a bit.
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shift selector

C59 5-speed (Corolla, Matrix)

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C59 ratios (Wikipedia)
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C59 ratio (Cargister)
The C59 is another very common gearbox, probably the most widely used in the Toyota lineup. There are also several versions of this transaxle in circulation:

1) The 95'-02' Corolla with a 3.7 FD
2) The 03'-08' Corolla/Matrix with a 3.9 FD
3) The 09'-13' Corolla with a 4.3 FD

These transmissions have the worst ratios, and probably for fuel economy reasons. There is also a speculation that the C59 is the strongest of the group, but its likely those claims arent backed by a real motorsport comparison and are just based on the number of units that fail. To make this gearbox shine you would need the latest 4.3 FD, the Cusco LSD,  and swap in the C56 4th gear.

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output shaft

C60 6-speed (All 2ZZ-GE cars + Lotus)

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C60 ratios (Wikipedia)
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C60 ratios (Cargister)
The C60 represents the pinnacle of Toyota transaxle design. It has the bigger 40mm output shaft bearing, the sealed 4th, 5th and 6th bearings, bi-metal and coated 3rd gear synchro, a 4.5 FD and 6 perfectly spaced gear ratios. You cant quite grasp how amazing this gearbox is until you drive it, this thing has a way of making a 140hp car feel fast.  There are a ton of aftermarked parts for this box as well; from carbon synchros to a full fledged dog-box! The only thing this gearbox needs is the Cusco LSD, and you can run with the K-swap guys.

​I hope this guide helps you plan your ideal gearbox, I've started to produce assembly method videos as well! You can always check out my Youtube channel where I've uploaded a ton of race footage showing how some of these builds perform on the street, autocross, and road course. 
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AR C60 Hybrid

The "after-market" 

Here is where I'll list a bunch of the parts I know about for these transmissions, starting with the 5-speed:

5-SPEED (C50-59)
​
1) Mfactory 4.7, 4.9, 5.1 FD (AE92)($600)
2) KAZZ 4.6 FD($1400)
​3) KAZZ close ratio gearset($3100)
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Kazz
6-SPEED (C60)

1) InoKinetic Carbon-lined synchros($350)
2) Jubu Racing 5.0 FD (330ftlb rating)($1900)
3) Jubu Racing/SSC Gear stronger 3-4 gear-set (265ftlb rating)($1200)
4) KAZZ 4.8FD($1300)
5) KAZZ close ratio gear-set($3400)
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Kazz
6) Quaife dog-gear set($6000)
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Quaife
6) Quaife Sequential transmission ($8000)
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Lotus talk forum
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22 Comments
Chris
8/15/2018 05:55:09 pm

Tom,
I'm working on a mystery/frankenstein c60 transmission. It was sold to me as a c66 (euro spyder) but the case is stamped c60. It needed new synchros but everything else was perfect and it came with an lsd! While pressing the gears off the output shaft, another mechanic dropped the shaft and damaged the pinion gear. I sourced a(used) replacement from Europe but it has a much smaller pinion. Can you help me identify if the output shaft I have is a 3.914 or a 4.5? You're YouTube videos are great btw and this is some very good information!

Thanks, chris

Reply
Tom
8/16/2018 07:31:06 pm

Hi Chris. I would be upset if someone dropped my shaft, they arent cheap. If you count the teeth on the pinion shaft we can tell what the ratio is.

Reply
Chris
8/16/2018 07:45:36 pm

Tom,
I did alot more research and found the ratio! The c66 shaft was a 17 tooth with 67 ring gear teeth. So final drive is 3.9. The company that sent me a replacement shaft accidentally sent a 16 tooth that mates with a 69 tooth ring for an FD of 4.3. I think I'm good now but thanks for documenting all this great info!

Seyoum Abraham
10/6/2018 01:19:16 pm

Hi .,

Thanks for this useful info , can I use 3rd 4th 5th gear set form C150 gearbox to C56 ? Are the gears and sync sliders same insize ?

Thanks in advance !

Reply
Tom
10/6/2018 03:17:14 pm

Hey. I believe the gears are the same size but the synchros and shift hub(slider) have been updated and have to be changed as well.

Reply
GERARD DUROCHER
12/13/2018 10:51:15 am

How difficult is it to swap 4.53 final drive in c60 to the 3.914 ? Looking to know how many rpms will be reduced at freeway speeds ?

Reply
Tom
12/13/2018 12:07:34 pm

First you would need to find a Euro C66 from their MR-S, then swap those parts into a C60. You would be better off swapping in a Corolla 5 speed

Reply
Scott
1/31/2019 09:43:54 am

Looking for some gear options for a Toyota e 350 trans axle is there a phone number I can call or get some info

Reply
Tom
2/17/2019 01:24:05 pm

You can contact me using the contact page, I’ll respond through email

Reply
Rich
2/16/2019 07:38:29 pm

I have a 2006 Scion xB with a 5 speed , I was told I could but a 2003 Corolla 5th gear set to change the 5th gear ratio , is this true and If so does anyone know the part numbers

Reply
Tom
2/17/2019 01:21:58 pm

I’m not sure since I haven’t had a 350 apart yet

Reply
Chuck
5/14/2019 11:22:11 am

Gear Sub-Assembly 5TH
Part Number: 33036-12120

Bearing Needle Roll
Part Number: 90364-24006

Gear 5TH Driven
Part Number: 33428-12100

Nut
Part Number: 90179-18005

Reply
JT
4/2/2019 11:12:26 pm

My C60 has different blend that I would like to share with you.

I used the 3rd and 4th from SSC (Jubu Copy) and 6th from Original C64 from Lotus which have a shorter gear. My pinion gear is 5.1 Jubu gear. I also have Cusco Type RS LSD in this gearbox.

My purpose of this gearbox is for circuit racing, hence what i am trying to do here is to evenly spaces every gears and make them as closed as possible, which it does. But i felt that in certain corners, it seems in the middle of a shift, so it is a bit too "close" in my opinion.

My next try is to use the FD from Kaaz which is 4.8, to make the shift hold a lil bit longer than Jubu 5.1

Reply
Tom
4/4/2019 07:14:24 pm

That’s an awesome setup you have! I can see how that 5.1 FD would be super short. I always felt like the 4.5 was short already. Keep me posted on how this works!

Reply
JT
7/15/2019 09:46:44 pm

I have done the swap out of the 5.1 Jubu with the 4.8 recently. This combination seem rather weak than the 5.1. My 6th gear seems useless now, as i only able to use 5th gear on the main straight of the circuit. Hence i guess for my setup, i might need some custom FD which is somewhere around 4.95 or 5.0 would be nice.

Carlos nieves link
7/8/2019 04:59:41 pm

Could I purchase 4.30 final drive gears for my c52

Reply
Tom
7/8/2019 05:59:30 pm

The C52 from the MR2 already has a 4.3FD. The last time I price checked that set alone it was about $400. You can get a whole used C52 for that price

Reply
Jack Beall
7/29/2019 03:07:05 pm

I have the mr2 spyder with the c56 tranny although it's stamped as c60.
What I need to know is the following:
If I swap in the internals of the c60 into my bell housing and middle section of my c56 and use the end part if the c60, will I be able to use all 6 gears.
In theory, it should work but I will appreciate your comments.

Thanks in advanced.

Reply
Tom
7/29/2019 04:11:00 pm

If you have a C56 now then the C60 will bolt up with no modifications needed. The C56 and C60 have ZZ engine code bell housings

Reply
angel maldoando
8/14/2019 10:55:49 pm

I have a 1997 Toyota RAV4 FWD, 5 Speed, 3SFE engine. It has the E250 FWD transaxle. Which Cuzco LSD would I need for the street?

Reply
Kevin Navarre
10/18/2019 02:20:42 pm

Hi, I put an '87 C52 bellhousing on a 2000 Celica C56. That went fine had to change one countershaft bearing and use the C52 shift shaft. Then I tried the stub shafts and they don't fit. Is there a bolt in set of shafts? Or a combination of parts that don't require any machining?

Reply
Tom
10/18/2019 07:07:27 pm

I assume you used the differential from the C56, that diff has the 20 spline axles where the C52 has 23 splines. You will need the axles for a MRS I believe

Reply

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