6 Speed 3MO ETV 2WD Sequential Gearbox Specifications

3MO FRONT WHEEL DRIVE GEARBOX

Torque 500 Nm / 370 lb-ft

FWD 500 6 Speed

OVERVIEW

 The 3MO ETV 2WD sequential gearbox has been designed to fit both front and rear-engined saloon and prototype race cars where the engine is mounted in the transverse position..  

3MO’s extremely versatile ETV gearbox is well proven with over 500 units running in Motorsport vehicles around the world. This 500 Nm capable gearbox has been fitted to championship winning cars in Europe and Asia across Circuit, Road Racing, Hillclimb, Off-Road, Rally-Cross and Rally motorsport disciplines. 

This 3MO transmission has been and is fitted to a number of Global OEM car manufacturer’s “one make race” programs. Some examples are:

  • Citroen’s rally program with the DS3 R3
  • Lamera’s 8, 10, 11, 12 and 30 hour circuit racing endurance events
  • VW with their Polo and Ameo Cup Championships.
  • The Kia Ceed TCR circuit racing program also uses this gearbox.

High torque handling capacity (350 Nm with short final drive ratios up to 500 Nm with long final drive ratios) combined with fitting flexibility makes this transmission extremely popular with race car drivers around the globe. There are two versions – one for clockwise rotating engines and another for counter clockwise rotating engines – e.g. Honda B Series. 

To optimize race vehicle performance, there’s a wide range of gear ratios to choose from. When combined with the 10 final drive ratio options; there’s a ratio for almost every situation out there – be it on the tarmac, gravel or dirt. Gearbox lubrication is provided by either an external pump feeding internal oil galleries, or splash lubrication depending on the customers preference and budget.

The standard self-locking-differential has 3 plates and 12 friction discs with (40 °/ 60 °) or (30 °/ 60 °) ramps, and will meet customer needs in 90% of race conditions. However;  for extreme applications there’s also a 4 plate with 16 friction disc option. Our differentials are fitted with new molybdenum-coated friction discs.  Molybdenum is a high performance friction metal.  It has a high level of elasticity and improves the characteristics of steel at high temperatures providing better progressiveness, higher coefficient of friction, and a longer service life. We have a range of gearbox accessories available too. 

These gearboxes meet FIA R3 specifications for Rally, and  TCR / WTCC & CTCC specifications for Circuit Racing. We have 3MO sequential transmissions for sale now.

APPLICATIONS

Circuit – Rally – Hillclimb – Off Road

BENEFITS

Reliability – High Torque Capacity – Optimized Gear Ratios – Flexible Fitting

GEARBOX IN ACTION

SPECIFICATIONS

  • 6 speed sequential gearbox with straight cut and dog engaged gears 
  • Maximum engine torque 350 Nm / 260 lb-ft (short final drive ratios) to 500 Nm / 370 lb-ft (long final drive ratios)
  • 20mm / 0.787″ gear tooth width on 1st, 2nd, 3rd and 17 mm / 0.669″ on 4th, 5th, 6th
  • 89mm / 3.5″ shaft centerline 
  • 11 final drive ratio options
  • 35 gear ratio options
  • Self locking differential with two disc and ramp options
    – 3 plates with 12 friction discs, ramps 40 ° / 60 ° (or 30 ° / 60 °)
    – 4 plates with 16 friction discs, ramps 40 ° / 60 ° (or 30 ° / 60 °)
  • Splash or External Oil Pump lubrication channeled through internal oil galleries
  • Input shaft length and spline to suit customer needs
  • 52mm hydraulic clutch bearing + feeder hoses
  • 0-5V gear position sensor 
  • Lock out cable for reverse
  • Weight: 41kg / 90lb

RATIOS

Gear RatiosGear Position
 TeethRatioTeethRatio1st2nd3rd4th5th6th
Ultra Short 11 x 534.81812 x 373.083     
Ultra Short13 x 604.61512 x 352.917     
Short12 x 524.33313 x 342.615     
Short12 x 50 4.16715 x 362.400    
Medium12 x 453.75013 x 312.385    
Medium16 x 533.31314 x 332.357    
Long17 x 533.11813 x 302.308    
Long16 x 472.93814 x 322.286    
Ultra Long18 x 512.83313 x 292.231    
Ultra Long15 x 412.73314 x 302.143    
Ultra Long17 x 452.64715 x 322.133    
   14 x 292.071    
   16 x 322.000    
   17 x 331.941    
   15 x 291.933    
   17 x 321.882    
   17 x 311.824    
   15 x 271.800    
   17 x 301.765    
   18 x 311.722    
   17 x 291.706    
   18 x 291.611    
   16 x 322.000   
   15 x 291.933   
   15 x 271.800   
   18 x 311.722   
   16 x 271.688   
   17 x 281.647   
   18 x 291.611   
   17 x 271.588   
   17 x 261.529   
   18 x 271.500   
   17 x 251.471   
   18 x 261.444   
   19 x 271.421   
   18 x 251.389   
   20 x 271.350   
   19 x 251.316   
   21 x 271.286   
   21 x261.238   
   22 x 271.227   
   19 x 231.211   
   21 x 251.190   
   20 x 231.150   
   23 x 261.130   
   20 x 221.100   
   21 x 231.095   
   28 x 301.071   
   28 x 291.036   
   23 x 231.000   
   25 x 240.960   
   32 x 300.938   
   23 x 190.826   

ACCESSORIES

  • Bell housings and Adaptor plates
  • Mounting kit
  • Gear lever
  • Shift Cut Knob for Gear Lever
  • Paddle Shift Solutions
  • Breather Kit 
  • Programmable gear position display
  • Hydraulic feeder release clutch tubes kit
  • Clutch cover & disc
  • Flywheel
  • Starter Motor
  • Output flanges / CV Joints
  • Drive Shafts – custom made 28mm maximum
  • Clutch – 184mm maximum

NOTES

  • This gearbox is defined for a ceramic single-disc clutch or Sintered double-disc 184mm max; with clutch disc (s)
  • The original flywheel cannot be kept because it is not compatible with a rigid clutch 184mm. 
  • The box is designed to accommodate standard tulips Peugeot Citroën Boxer / Jumper in 41 grooves. 
  • A minimum 0.7″ master cylinder can be installed on your original clutch pedal.
  • It is imperative to install an adjustable end stop on the clutch pedal, because the hydraulic stop does not have an output stop.
  • Depending on your application an oil cooler may be recommended.  A 13 row cooler measuring 210 x 98 x 50mm with AN6 inlet / outlet fittings will work well.
  • Must use 75w140 fully synthetic lubricant – Motul Gear Competition is highly recommended
  • Oil Capacity is 1.4L excluding lines and cooler