Specifications 6 Speed 3MO ETV Sequential Gearbox

SPECIFICATIONS

 

3MO FRONT WHEEL DRIVE GEARBOX

Torque 500 Nm / 370 lb-ft

FWD 500 6 Speed

OVERVIEW

 

The 3MO ETV 2WD 6 Speed 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, Asia and the South Pacific in 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 Polo and Ameo Cup.
  • Renault Megane TCR.
  • Kia Ceed TCR.

High torque handling capacity of 350 Nm with short final drive ratios and 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 Racing - Road Racing - Time Attack - Rally - Hillclimb

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 centreline 
  • 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 channelled through internal oil galleries
  • Input shaft lenght 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

 

Final Drive Ratios 

Gear Ratios

Gear Position

  Teeth Ratio Teeth Ratio 1st 2nd 3rd 4th 5th 6th
Ultra Short  11 x 53 4.818 12 x 37 3.083          
Ultra Short 13 x 60 4.615 12 x 35 2.917          
Short 12 x 52 4.333 13 x 34 2.615          
Short 12 x 50  4.167 15 x 36 2.400        
Medium 12 x 45 3.750 13 x 31 2.385        
Medium 16 x 53 3.313 14 x 33 2.357        
Long 17 x 53 3.118 13 x 30 2.308        
Long 16 x 47 2.938 14 x 32 2.286        
Ultra Long 18 x 51 2.833 13 x 29 2.231        
Ultra Long 15 x 41 2.733 14 x 30 2.143        
Ultra Long 17 x 45 2.647 15 x 32 2.133        
      14 x 29 2.071        
      16 x 32 2.000        
      17 x 33 1.941        
      15 x 29 1.933        
      17 x 32 1.882        
      17 x 31 1.824        
      15 x 27 1.800        
      17 x 30 1.765        
      18 x 31 1.722        
      17 x 29 1.706        
      18 x 29 1.611        
      16 x 32 2.000      
      15 x 29 1.933      
      15 x 27 1.800      
      18 x 31 1.722      
      16 x 27 1.688      
      17 x 28 1.647      
      18 x 29 1.611      
      17 x 27 1.588      
      17 x 26 1.529      
      18 x 27 1.500      
      17 x 25 1.471      
      18 x 26 1.444      
      19 x 27 1.421      
      18 x 25 1.389      
      20 x 27 1.350      
      19 x 25 1.316      
      21 x 27 1.286      
      21 x26 1.238      
      22 x 27 1.227      
      19 x 23 1.211      
      21 x 25 1.190      
      20 x 23 1.150      
      23 x 26 1.130      
      20 x 22 1.100      
      21 x 23 1.095      
      28 x 30 1.071      
      28 x 29 1.036      
      23 x 23 1.000      
      25 x 24 0.960      
      32 x 30 0.938      
      23 x 19 0.826      

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 needed, if so then a 13 row cooler measuring 210 x 98 x 50mm with AN6 inlet / outlet fittings will work well.
  • Motul HD 85W-140 Mineral or Motul 75W-140 Gear Comp Synthetic are the correct lubricants for this gearbox operating at 95-110°C or 203-230°F.
  • Oil Capacity is 1.4L excluding lines and cooler