Mazdaspeed "Dog Box" 5-speed Gearset Kit - Greenlight Deposit

This is the Deposit Only: Total price is ~$8500 (development is in progress and actively affecting price).  Total estimated timeline for the project is approximately 4 months. Production will start once enough buyers are secured

Please email barett@contrive.design for Purchase Agreement. 

We have finalized gear ratios and I'm excited to say I think this is a great setup for the overall community.  I went through upwards of 17 different ratio stacks to get to this point.  The process is long and tedious but necessary.  I've learned alot in the process about gears and how ratios are finally determined.  Its more than just pick a ratio, it has a lot to do with the actual design of the tooth itself and how it interacts with its counter tooth.  There are "ranges" of tooth size to balance strength, durability and drivability that all have to be considered.  These variables all lead to set ratio options to choose from.  Its been a fun exercise. 

Now the ratios below are about 95% certain, once we get into more manufacturing review there might be a slight change but should not be anything major...like changing ration 0.05 or so...

Ok so the details: 

Gear Ratio Stack: 

1st - 2.917

2nd - 1.938

3rd - 1.350

4th - 1.042

5th - 0.962

Final Drive:

GEN1 3.94/3.35

GEN2 4.187/3.526

What is part of the Dog Box Gearset Kit: 

- Input shaft with larger GM26 spline

- 1-4 gears straight cut w/dog engagement

- 5th gear straight cut w/dog engagement

- Dog engagement slide rings for 1-2 & 3-4 & 5th

- Billet Shift Fork for 3-4

- Matching Reverse Gear

- Triple Shaft Cuff Collar located at 6th gear location 

- Gear Material 9310

- OPTION:  Choose you Final Drive Ratio -> GEN1 or GEN2

Design has moved to 100% straight cut as it was the best balance of cost, manufacturability and strength. 

Pricing Structure:

• Total Price: $8500+ shipping
• A Purchase Agreement will be required and there is no refund once deposit and following payments are made. If you need to bail out, then you need to find someone else to take your spot, and you will only receive a partial refund. 
  
• Payment Schedule: 
  • Greenlight production: $5000
    
  • Final Payment Due TBD when ready to ship. Estimated Late Summer 2026: $3500 + shipping

What else is needed to get this into your car?

- Some bearings used in the transmission will need to be replaced and some shims will need to be replaced.  This is a few hundred dollars.

- New clutch disc (only the clutch disc, an entire new clutch is not required) to accommodate the larger GM 26 spline input shaft.

- Assembly is an in-depth process but is NOT impossible to do if you have a press, basic tools and patience.

- I may consider offering assembly services for an additional price+shipping.

FAQ:

- Does this fit my car?  This gearset is designed to work on the 2006-2007 Mazdaspeed 6 and both generations Mazdaspeed 3 2007-2013. 

- Can a dog box transmission be driven on the street?    Yes, but it requires more intent while driving.  If the car you are thinking of adding a dog box to is your daily driver then I would recommend not doing this, but if it’s an “extra fun car” then I think it could be a great addition. 

- Check out this video from PPG about driving a dog box on the street.

https://www.youtube.com/watch?v=n_1jO64tuQA   

- How much power can this handle and do I need to make at least 500+hp? The design and material choice is be developed to support 1000+whp and there is no minimum horsepower required to utilize a dog box gearset.

- Is this a whole new transmission? NO, this replaces the internal gears, shift forks, pinion shaft and input shaft only.  The cases are reused.  Some of the bearings will need replaced and some can be reused.

- What is the warranty? This is a motorsport part, thus if it is opened, installed, used…etc then you own it.  If there is a manufacturing defect or issue, then the parts will need to be inspected and assessed to determine how to action.