GEARBOX & DIFFERENTIAL 32
GEARBOX information
The F302 car mounts a new Hewland 6 gear sequential gearbox, the FTR-200. All gears, crown-
wheel and pinion, some differential parts, bearings and the casing are new. Consequently the
maintenance is different in many ways and some specific tools are required for proper
maintenance. Hewland has written a technical manual, including a spare parts list, for the FTR-
200. The manual is available at Hewland. To receive a copy please, contact the commercial office
at Hewland by e-mail: sales@hewland.com
To take the differential out you first need to take remove the LH-side outer tripod housing which is
locked with a wire ring (circlip type fitting) inside the RH tripod housing. We build a specific tool,
available at Dallara’s stores.
To open the differential you have to remove the bearing in order to reach the bolts of the casing
cover. Use proper tools in order to avoid damaging the bearing and the diff cover.
IMPORTANT BASIC INFO
• The mandatory standard Dallara crown-wheel & pinion ratio: 12/34
• Total oil quantity for diff and gearbox: 2.5L
• Oil type: SAE 80 or 90
• Pinion bearing nut tightening torque: 176Nm (130lbs.ft)
• Pinion shaft nut tightening torque: 135Nm (100lbs.ft)
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