3MO TXB 900 Nm RWD Drop Gear Transmission Specifications

3MO TXB RWD SEQUENTIAL TRANSMISSION

900 Nm / 665 lb-ft Drop Gear

RWD 900 6 Speed Drop Gear System 

OVERVIEW

The 3MO TXB 6 Speed 900 Nm / 665 lb ft Sequential Gearbox suits race and high performance street vehicles where the engine is longitudinally mounted in the front or mid positions, and driven through a rear wheel differential. This sequential transmission features a drop gear system with 3 ratio choices which can be changed in 30 minutes without needing to remove the gearbox from the vehicle. The Drop Gear System allows fine tuning of ratios on race day, and eliminates having to change rear differentials out during the week just to setup for a different track next weekend.

With 52 gear ratios to choose from, the dog speed delta between gears can be optimised for lightening quick and almost imperceptible gear shifts keeping the power to the track for the maximum amount of time. When combined with the 3 different drop gear options, there’s a setup for almost every situation. This highly reliable and precision engineered sequential gearbox delivers ~97% efficiency.

This TXB gearbox is rated for engine torque of 900 Nm / 665 lb ft in Circuit / Road Racing and Rally applications. In Drifting applications, this 6 Speed sequential transmission is capable of handling engine torque of 1500 Nm. This super flexible platform is also available in four wheel drive configuration – see HERE

With proper shift technique and lubrication; dog rings are designed for 60 hours of racing or 8400km / 5250 miles. 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.

Its easy to see why with all this flexibility the 3MO TXB 6 Speed Sequential Transmission is popular with race teams around the world. We have 3MO Sequential Gearboxes for sale for EV, FWD, RWD and 4WD motorsport vehicles

.

APPLICATIONS

Circuit Racing- Road Racing – Rally – Off Road – Drift

BENEFITS

Strength – Wide Range of Gears – Flexibility – Drop Gear System

GEARBOX IN ACTION

SPECIFICATIONS

  • 6 Speed Sequential Transmission with drop gear system for 30 minute change of drive ratios with gearbox in situ.
  • Maximum engine torque 900 Nm or 665 lb ft with 1st gear ratio limited to 2.615
  • 20mm / 0.79″ wide gears on 1st, 2nd & 3rd with 17mm / 0.67″ wide gears on 4th, 5th & 6th
  • 89mm / 3.5″ shaft centre line distance
  • Rear mounted Drop Gear System with 3 ratio options to change between
  • 52 gear ratio options
  • Gear selector inversion lever
  • Splash lubrication
  • Input shaft length and spline can be made to customer requirements
  • 0-5V gear position sensor
  • Lock out cable for reverse gear
  • 36kg / 79lbs

RATIOS

Drop GearsGears
TeethRatioTeethRatio1st2nd3rd4th5th6th
25 x 240.96013 x 342.62     
27 x 240.88915 x 362.40    
24 x 200.83313 x 312.38    
  14 x 332.36    
  13 x 302.30    
  14 x 322.28    
  13 x 292.23    
  14 x 302.14    
  15 x 322.13    
  14 x 292.07    
  16 x 322.00    
  17 x 331.94    
  15 x 291.93    
  17 x 321.88    
  17 x 311.82    
  15 x 271.80    
  17 x 301.76    
  18 x 311.72    
  17 x 291.70    
  18 x 291.61    
  16 x 322.00   
  15 x 291.93   
  15 x 271.80   
  18 x 311.72   
  16 x 271.69   
  17 x 281.65   
  18 x 291.61   
  17 x 271.59   
  17 x 261.53   
  18 x 271.50   
  17 x 251.47   
  18 x 261.44   
  19 x 271.42   
  18 x 251.39   
  20 x 271.35   
  19 x 251.32   
  21 x 271.29   
  21 x261.24   
  22 x 271.23   
  19 x 231.21   
  21 x 251.19   
  20 x 231.15   
  23 x 261.13   
  20 x 221.10   
  21 x 231.09   
  28 x 301.07   
  28 x 291.04   
  23 x 231.00   
  25 x 240.96   
  32 x 300.94   
  23 x 190.83   

ACCESSORIES

Gearbox & Transmission Accessories and Components

  • 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.
  • There is no slave cylinder stop, so a pedal mechanical stop is necessary.
  • Must use 75w140 fully synthetic lubricant kept between 90-105 C or 195-220 F. Motul Gear Competition is highly recommended.
  • Oil Capacity is 1.3 Litres or 1.4 Quarts excluding lines and cooler