Very light and rigid Casing
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Excellent life time and low maintenance
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Casing from a billet of air craft quality aluminium combines minimum weight with superior mechanical, dimensional and thermal stability. |
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High quality precision ground gears gives excellent life time of gearbox with minimum maintenance.
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Simple maintenance
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Smooth gear change helps to drive faster
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Layout allows for complete gear set to be removed in just a few minutes. |
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The gear selection mechanism is consistent, reliable and very smooth. Thanks to the smooth gear change mechanism, wear on dog rings is exceptionally low. |
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The Tractive Modular Concept
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Easy adaptions to a wide range of cars
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The modular concept of the Tractive sequential gearboxes is successfully being used since 1995.
It makes is possible to offer premium quality gearboxes with top class performance and functionality to a competitive price.
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The Tractive Modular Concept allows for very easy adaptation of the RD90 gearbox to a wide range of Rear Wheel Drive cars, from MKII Escorts with some 220 Nm to powerful V8’s with 900 Nm of torque.
Adapt the RD90 to virtually any engine/car combination without need for new patterns or extensive redesign.
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Andreas Boström, Rally Cross Champion:
“I've driven with a Tractive RD906 gearbox and the Tractive differential fo rmany years and in over 11.000 km I've only replaced two gears and quite a lot of oil, that's it! Not even a dogring. The car is a BMW E46 with S54 motor, 3,3L and 433hp.
I am super satisfied with the low running costs and the reliability of the transmission!”
Options
Clutch shafts
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Front plates/Bell housing bolt patterns
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Separate clutch shaft drives the input shaft via a splined coupling. Different lenghts and spline configurations are possible.
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Wide range of front plates with different bolt patterns, plus universal bolt pattern available.
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Output flange options
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Ratios and Drop gears
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GKN CV joint 94 mm PCD
Ford Atlas
BMW 3 bolt 110 mm PCD
Volvo M45 4 bolt 79mm PCD
Toyota Supra
Volvo / BMW 3 bolt 96mm PCD
BMW 3 bolt 105mm PCD
Other PCD may be available upon request.
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Wide range of speeds available.
The RD90 gearboxes have a drop gear arrangement to compensate for various rear axle ratios, or to fine tune the top speed and acceleration characteristics. Two gears situated behind a cover at the rear of the gearbox are easily replaced to alter the overall ratio of the gearbox.
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Technical Data
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RD905 |
RD906 |
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Number of speeds: |
5 forwards,
1 reverse |
6 forwards,
1 reverse |
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Gear positions: |
R-0-1-2-3-4-5 |
R-0-1-2-3-4-5-6 |
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Recommended max engine torque: |
700 Nm |
600 Nm |
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Weight: |
30 kg |
35 kg |
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Lubrication |
1.2 L |
1.3 L |
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Wet sump. GL5 spec. transmission oil.
Tractive recommends SAE 90 gear oil, available from Tractive in 1 L bottles.
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Clutch release mechanism: |
Not integrated with the gearbox. Usually fitted in the standard bellhousing. |
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Clutch rings (dogrings): |
Tractive standard with 90 mm O.D. with radiused corners for long lifge and good durability. |
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Cockpit Gear Lever:
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Tractive sequential shift gear lever with return springs. Two lengths available. |
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Gear Lever and gearbox connection: |
Through 8 mm stanless steel rods, either direct or over a bell crank on the prop-shaft tunnel. |
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Reverse gear engagement: |
With clutch ring shared with 1:st gear. Note! No sliding gears, no chips or swarf in the gearbox. |
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Reverse gear release mechanism: |
A separate lever on the gear lever must be operated to release engagement of reverse gear. |
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Gear wheel width: |
17 mm for all gears. |
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Ratios: |
See Ratio charts |
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Drop Gears: |
13 different drop gears are currently in production. |
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Bearings: |
Standard type SKF cylindrical roller bearings for input and output shafts. Ball bearings for selector drums. |
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Bearings in clutch gears: |
INA cage type needle roller bearings. |
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Surface treatment of casing: |
All parts making up the casing are anodized in black colour.
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Documents
RD drawing
Workshop manual