Swapping transmissions

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Not a cheap exercise but certainly achievable. The hardest part would be the OEM wiring if the truck isn't fitted with a harness that accepts either type of gearbox. Aside from that you'll need the box itself, possibly a shorter tailshaft, the shift console and any panels needed for it, the dash display and you'll want to remove the clutch pedal inc linkages/hoses/lines if you want to go to an Ultrashift.