3MO TXL RWD 6 Speed Ultralight Gearbox Specifications

3MO TXL RWD SEQUENTIAL GEARBOX

600 Nm / 450 lb-ft Ultralight

RWD 600 6 Speed Ultralight Gearbox

 

OVERVIEW

 The lightweight 27kg / 59lb 3MO TXL 6 Speed RWD Sequential Gearbox suits racing engines using longitudinally orientated, front or mid mounted engines, connected to a rear wheel drive differential. Race car owners spend a lot of time and money taking weight out of their cars, so it makes no sense adding that weight back with a heavy or over specified gearbox that’s not fit for purpose. The transmission’s compact size means driveline tunnels don’t usually need to be modified making fitting simple and easy in a wide range of situations. If you have 600nm or less, then the TXL lightweight and super quick shifting sequential gearbox is probably the right choice for you.

This versatile 3MO sequential gearbox has a wide range of 35 gear ratios and 3 driven shaft ratios to choose from ensuring drivers can specify the gearbox at ordering time for their unique needs – in other words; there’s a gear ratio for almost every situation. The TXL 6 Speed Sequential Gearbox is capable of handling engine torque of 600 Nm with 1st gear@3.08 and 0.97 input drive (25 x 24) i.e. 2.98. If a taller 1st gear ratio of 2.92 and 0.87 input drive (23 x 20) ie 2.54 are chosen; then torque capability is reduced to 520 Nm.

In Drifting applications, the 3MO TXL Sequential Transmission is capable of handling engine torque of 1200 Nm with 1st@2.98, or 1000 Nm with 1st@2.54.

There are three inspection ports to allow for easy checking of the dog rings without disassembling the gearbox, which saves workshop time.

With proper shift technique and lubrication, dog rings should be good for 60 hours of racing or 8400km / 5250miles. Likewise, gear positions 2 and 3 are rated for 50 hours or 7000km / 4375 miles, with gear positions 4, 5 and 6 being rated for 75 hours or 10500km / 6560 miles. These service life ratings assume the gearbox is being run at the maximum torque loading – clearly if the torque is less than the maximum load, then the service life is extended.

This gearbox is also available in 4WD format  

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APPLICATIONS

Circuit – Road Racing – Rally – Hillclimb – Off Road – Drifting

BENEFITS

Reliability – Lightweight – Compact Size – Wide Range of Ratios – Flexible Fitting 

GEARBOX IN ACTION

SPECIFICATIONS

  • 6 or 5 speed sequential gearbox with straight cut and dog engaged gears 
  • Maximum engine torque:

      – 600 Nm / 450 lb-ft (1st gear 3.08, constant drive 0.97, i.e. 1st gear global ratio 2.98) in Circuit, Road Racing and Rally applications

      – 1200 Nm / 885 lb-ft (1st gear 3.08, constant drive 0.97, i.e. 1st gear global ratio 2.98) in Drifting applications

  • 89mm / 3.5″ shaft centreline 
  • 20mm / 0.787″ gear tooth width (1st – 2nd – 3rd) & 17mm / 0.669″ (4th – 5th – 6th)
  • Ratio options: 

        – 3 input constant drive ratios 
        – 35 gear ratios 

  • Bespoke Input Shaft length and spline to suit customer requirements
  • Range of bellhouses for most of the popular engines 
  • Splash lubrication
  • 3 dog ring inspection ports
  • 0-5V gear position sensor 
  • Lock out cable for reverse
  • Weight: 27 kg

RATIOS

Input Drive RatiosGear RatiosGear Position
 TeethRatioTeethRatio1st2nd3rd4th5th6th
Short25 x 190.76012 x 373.083     
Medium23 x 200.87012 x 352.917     
Long25 x 240.96013 x 342.615     
   15 x 362.400    
   13 x 312.385    
   14 x 332.357    
   13 x 302.308    
   14 x 322.286    
   13 x 292.231    
   14 x 302.143    
   15 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   

ACCESSORIES

We have a big range of transmissions accessories

  • Bell Housings and Adaptor Plates
  • Gear Lever
  • Shift Cut Knob for Gear Lever
  • Paddle Shift Solutions
  • Breather Kit 
  • Programmable Gear Position Display
  • 52mm hydraulic clutch release bearing + feeder hoses
  • Generic customisable cross member to make fitting faster 

NOTES

  • A minimum 0.7″ master cylinder can be installed on your original clutch pedal setup.
  • An adjustable clutch pedal stop is needed as the hydraulic release bearing 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 75w140 Gear Competition is highly recommended.
  • Oil Capacity is 0.9 litres or 1.06 quarts excluding oil lines, pump and cooler