Wide gearbox crossmember

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A wide crossmember can be bolted to the floor pan using large washers for reinforcement. Then the original 1200 gearbox body brackets can be removed, providing enough space for large gearbox fitment.

Overview

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This is not need for A-series gearboxes. See

• 56-Series_Transmission#56_5-speed_swap_Notes
• 60-Series_Transmission#Rear_Crossmember
• 63-Series_Transmission#63-Series_5-speed_Swap_Notes

For manual 1200 car, remove the factory mounting bosses from the tunnel, and fabricate new ones:
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Note that the factory crossmember mounting brackets have been removed from inside the tunnel. The new custom crossmember bolts to the floor.

universal gearbox crossmember designs
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A piece of 40mm box steel will do the job. Bolt it to the rubber mount of the gearbox and then bolt it to the floor - add some spacers as required.

PIGDOG welded late model Nissan floor boss
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mattdatca18
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sandwich
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