Transmission Options
Looking for a kit with a built transmission or need something unique?
Get a quote from Joel
GR700
- Most popular option
- Factory 700 ft lb rated Tremec T56 Magnum
- We have had great success with cars making 1000HP or more in street car applications.
- Super Strong at a Great Value
- TREMEC 1 year warranty
GR1200
- Built Synchronized H-Pattern trans
- Normally recommended for cars making over 1100HP
- Billet Front Plate with pump
- Spray bar for gearset cooling and lubrication
- REM ISF Finished gear, shafts, rails
- Every transmission is dyno tested. Reduced gear noise
- "Grannas" Orange Cerakote for heat dissipation
- Best Synchronizers available. Carbon 1-2 and Hybrid for 3-6 and reverse.
- Maximum strength while remaining streetable
ATLAS
- 6-speed Billet Gearset H-Pattern
- The strongest possible option. Tested to 2000 ft/lbs in V10 applications.
- Billet Front Plate with pump
- Spray bar for gearset cooling and lubrication
- Dog Engagement on ALL GEARS
- Also available with handcuffed 5th/6th in a 4-speed setup for drag racing
- Custom input shaft options. Added length or stronger input spline
- Multiple gear ratios. Super tall, tight split options for drag racing.
Clutch Options
Which Clutch is best for your project?
Read Joel's recommendations
Tilton ST246
Our best selling twin disc. The quietest, smoothest engaging, all around best clutch we sell. Organic SPRUNG discs. Nothing else like it out there! Full billet construction with billet flywheel.
900 ft lbs torque capacity
Tilton ST246 "HD"
The strongest and best driving super duty clutch we sell yet still has great drivability. Unsprung cerametallic discs. Full billet construction with billet flywheel.
1300+ ft lbs torque capacity
We can supply you with all the parts you need to convert your factory automatic to a manual. We even reproduce parts where OEM manufacturers have discontinued them!
If available for your chassis, the kit builder above will allow you to select which parts you need for your conversion.
- Clutch Pedal
- Brake Pedal
- Interior Panel / Shift Boot
- Tunnel Conversion Cover
We offer shifters, shift knobs, shift handles, and many other small detail items to help make your swap turn out exactly the way you want it, with your finishing touches.
For example, in this MKIV supra pictured, the T56 is unknown to the naked eye, everything looks factory. That is the goal, to make it look like a factory car but hold up to high horsepower engine setups.
Our billet alignment tool is a must for multi-disc clutch setups. Save struggle at install time by using this tool.
Our index plate ensures a long, trouble-free life with your brand new transmission. It also helps to ensure less noise and is a required step to keep your transmission's factory warranty!
The Original.
It all started with a goal to be different than other shops. Keep it small, keep it honest. And continue to improve products every day.
OEM Quality Cast Bellhousings
Our cast bellhousings exceed OEM standards. Durable, quality construction to last a lifetime.
Lightweight but Strong
All our crossmembers are built with 4130 chromoly steel. The same stuff used in race car chassis.
Dampened where possible
The rubber T56 mount is a simple but needed part, everything else out there was too harsh.
Always Improving.
When I tried a product I didn't like... I knew I could build it better myself... So I did. Build the best stuff out there, and you don't need advertising!
The best clutch options
I am always looking for the next best thing. This is very apparent in the clutch department.
Auto to Manual parts
If available, I provide the auto to manual parts like clutch pedal, brake pedal, interior/shift boot.
High Quality Driveshafts
Quality carbon fiber and aluminum shafts built to fit your rear end of choice!
Quality Control
We build the parts. We test the parts. We support the parts.
All in one place
We pride ourselves in supplying 100% complete kits. The best, easy to install kit. Great fitment! No missing bolts.
Perfected Parts
Years of experience and improvements give you the best possible kit.
Durability Tested TO THE LIMIT.
If it can survive my racecar... you know its tough. You dream it. We will help make it a reality.
IMPORTANT NOTES:
This kit is for the MECHANICAL components only. Similar to when you buy a turbo kit, injectors, or other aftermarket part... This kit does not INCLUDE tuning to make it work with a OEM ECU or DME, however we can assist you with getting you on MHD and the code you need.
You will be required to get your car tuned to eliminate the gear position sensor. We are working on a more plug-and-play solution for that, but for now the lack of gear position requires some functionality to be coded out. As you can see in the video below, my car runs and drive no issues, but some features are not available (reverse lights, back up camera, downshift throttle blip) due to the lack of a gear position sensor.
The gear position sensor has never been available for a T56 or T56 Magnum, but we hope this will be available mid-late summer 2025. Once that product becomes available, downshift throttle blip, reverse functions, and other gear-position sensor related functionality will work again like factory.
Installing this kit and expecting it to work on the stock computer is unrealistic. This is an aftermarket transmission that does not have the same sensors, or gear ratios. So, like any aftermarket part, tuning will be required to make it function properly. The Good news is we have that all figured out now and get you hooked up with MHD and the coding.
Specifications
| Bellhousing | I already have a bellhousing or Grannas Cast Aluminum with hardware kit (street car) |
| Transmission | No Transmission or Close Ratio GM Magnum XL (TUET18131) or Wide Ratio GM Magnum XL (TUET18132) |
| Driveshaft - G80 M3 | No Driveshaft or Carbon Fiber Magnum-F to stock rear |
| Transmission Wiring | I do not need any wiring kit or Wiring Pigtail Kit (standalone engine management cars) or Bluetooth Wiring harness (stock ECU, stock speedometer) |
| Clutch | No Clutch or Tilton ST246 Twin (Organic) or Tilton ST246 "HD" Twin (cerametallic) |
| Hydraulic Release Bearing | I already have a release bearing or Tilton Release Bearing for T56 / T56 Magnum |
| Clutch Line | I already have a clutch line or Include braided clutch line with fittings |
| Flywheel Bolts | No Flywheel Bolts or ARP Flywheel Bolts |
| Billet Alignment Tool | No Alignment Tool or T56 Billet Alignment Tool |
| Index Plate (REQUIRED FOR WARRANTY!) | No index plate or Include bellhousing index plate |
| Shift Knob | No shift knob or Grannas Leather 6-speed knob or Grannas Black 6-speed ball or Grannas Brushed Aluminum 6-speed ball or TREMEC Black 6-speed ball or TREMEC White 6-speed ball or TREMEC Polished 6-speed ball |