{"glb":"/models/components/trans-manual.glb","parts":[
  {"id":"mt-case","node":"gearCase","label":"Manual Transaxle Case","assembly":"Gearbox","system":"Transmission","tier":"primary","function":"The one-piece alloy case of the G81.20 6-speed manual transaxle, housing the gear train, shift mechanism, and final drive in a shared gear-oil bath."},
  {"id":"mt-bellhousing","node":"bellHousing","label":"Bellhousing","assembly":"Gearbox","system":"Transmission","tier":"primary","function":"The bell housing at the engine end that encloses the flywheel and dry clutch and bolts the transaxle to the rear face of the engine."},
  {"id":"mt-dmf","node":"dualMassFlywheel","label":"Dual-Mass Flywheel","assembly":"Clutch","system":"Transmission","tier":"primary","function":"Two-mass flywheel that smooths crankshaft torque pulses before they reach the clutch, reducing gear rattle at idle and low rpm."},
  {"id":"mt-clutch","node":"clutchAssembly","label":"Clutch Assembly","assembly":"Clutch","system":"Transmission","tier":"primary","function":"Single dry clutch — the pressure plate clamps the friction disc against the flywheel to couple the engine to the input shaft, and releases when the pedal is pressed."},
  {"id":"mt-clutch-pressure-plate","node":"clutchPressurePlate","label":"Clutch Pressure Plate","assembly":"Clutch","system":"Transmission","tier":"sub","parent":"mt-clutch","function":"Diaphragm-spring pressure plate bolted to the flywheel that clamps the clutch disc; replaced together with the disc as a set."},
  {"id":"mt-clutch-disc","node":"clutchDisc","label":"Clutch Friction Disc","assembly":"Clutch","system":"Transmission","tier":"sub","parent":"mt-clutch","function":"Friction disc with a sprung hub splined to the input shaft — the primary wear item of the clutch system."},
  {"id":"mt-clutch-release-bearing","node":"clutchReleaseBearing","label":"Clutch Release Bearing","assembly":"Clutch","system":"Transmission","tier":"sub","parent":"mt-clutch","function":"Release bearing riding on the slave-cylinder snout that presses the diaphragm-spring fingers to disengage the clutch."},
  {"id":"mt-csc","node":"clutchSlaveCylinder","label":"Clutch Slave Cylinder (CSC)","assembly":"Clutch","system":"Transmission","tier":"primary","function":"Concentric hydraulic slave cylinder on the input-shaft axis that pushes the release bearing into the diaphragm spring when the clutch pedal is pressed."},
  {"id":"mt-input-shaft","node":"mtInputShaft","label":"Input Shaft","assembly":"Gear Shafts","system":"Transmission","tier":"primary","function":"Splined input shaft on the centre axis, driven by the clutch disc and carrying the forward drive gears."},
  {"id":"mt-pinion-shaft","node":"mtPinionShaft","label":"Pinion / Lay Shaft","assembly":"Gear Shafts","system":"Transmission","tier":"primary","function":"Lay shaft below the input axis whose driven gears deliver the selected ratio into the final-drive pinion."},
  {"id":"mt-gear-set","node":"mtGearSets","label":"Gear Set (6-Speed)","assembly":"Gear Shafts","system":"Transmission","tier":"primary","function":"Six helical forward gear pairs plus a reverse idler providing the G81.20's 6-speed ratio spread."},
  {"id":"mt-synchro-rings","node":"mtSynchroRings","label":"Synchronizer Rings","assembly":"Gear Shafts","system":"Transmission","tier":"sub","parent":"mt-gear-set","function":"Blocker rings that match shaft speeds before each gear engages, giving smooth crunch-free shifts."},
  {"id":"mt-selector-forks","node":"mtSelectorForks","label":"Selector Rods and Shift Forks","assembly":"Gear Shafts","system":"Transmission","tier":"sub","parent":"mt-gear-set","function":"Selector rods and shift forks that slide the synchro sleeves into the chosen gear."},
  {"id":"mt-reverse-idler","node":"mtReverseIdler","label":"Reverse Idler Gear","assembly":"Gear Shafts","system":"Transmission","tier":"sub","parent":"mt-gear-set","function":"Small idler gear that reverses the rotation direction for reverse gear."},
  {"id":"mt-shift-unit","node":"shiftSelectorUnit","label":"Shift Selector Unit","assembly":"Shift Control","system":"Transmission","tier":"primary","function":"External selector unit on top of the case where the two shift cables from the cabin work the select and shift levers."},
  {"id":"mt-shift-cables","node":"shiftCables","label":"Shift Cables (Select + Shift)","assembly":"Shift Control","system":"Transmission","tier":"sub","parent":"mt-shift-unit","function":"Pair of Bowden cables connecting the cabin gear lever to the selector unit on the gearbox."},
  {"id":"mt-selector-shaft","node":"mtSelectorShaft","label":"Selector Shaft","assembly":"Shift Control","system":"Transmission","tier":"sub","parent":"mt-shift-unit","function":"Selector shaft dropping from the shift unit into the case to work the internal shift gate."},
  {"id":"mt-final-drive","node":"finalDrive","label":"Final Drive / Differential","assembly":"Final Drive","system":"Transmission","tier":"primary","function":"The final-drive gear set and differential that split torque between the two rear half-shafts."},
  {"id":"mt-ring-gear","node":"mtRingGear","label":"Final Drive Ring Gear","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"mt-final-drive","function":"Hypoid ring gear stepping the pinion-shaft output down to the final-drive ratio."},
  {"id":"mt-differential","node":"mtDifferential","label":"Differential Carrier","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"mt-final-drive","function":"Differential carrier distributing final-drive torque between the rear wheels."},
  {"id":"mt-output-flanges","node":"mtDriveFlanges","label":"Output Flanges (x2)","assembly":"Final Drive","system":"Transmission","tier":"primary","function":"Splined flanges on each side of the differential that accept the rear half-shaft inner CV joints."},
  {"id":"mt-output-flange-l","node":"outputFlangeL","label":"Output Flange Left","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"mt-output-flanges","function":"Left-side drive flange connecting the differential to the left rear half-shaft CV joint."},
  {"id":"mt-output-flange-r","node":"outputFlangeR","label":"Output Flange Right","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"mt-output-flanges","function":"Right-side drive flange connecting the differential to the right rear half-shaft CV joint."},
  {"id":"mt-halfshafts","node":"mtRearDriveshafts","label":"Rear Half-Shafts (x2)","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"mt-output-flanges","function":"CV half-shafts transmitting final-drive torque from the output flanges to the rear wheel hubs."},
  {"id":"mt-drain-plug","node":"drainPlug","label":"Gear-Oil Drain Plug","assembly":"Service","system":"Transmission","tier":"primary","function":"Bottom plug on the case floor removed to drain the gear oil; replace the sealing washer at every service."},
  {"id":"mt-drain-seal","node":"drainPlugSeal","label":"Drain Plug Sealing Washer","assembly":"Service","system":"Transmission","tier":"sub","parent":"mt-drain-plug","function":"Crush-type sealing washer under the drain plug — single-use, replace whenever the plug is removed."},
  {"id":"mt-fill-plug","node":"fillPlug","label":"Gear-Oil Fill / Level Plug","assembly":"Service","system":"Transmission","tier":"primary","function":"Side plug used to fill and set the gear-oil level — fill until oil reaches the bore lip with the car level."},
  {"id":"mt-gear-oil","node":"gearOil","label":"Gear Oil","assembly":"Service","system":"Transmission","tier":"sub","parent":"mt-case","function":"Hypoid gear oil shared by the gearbox and final drive; drained at the floor plug and refilled through the side fill plug."},
  {"id":"mt-case-breather","node":"caseBreather","label":"Case Breather Vent","assembly":"Service","system":"Transmission","tier":"sub","parent":"mt-case","function":"Case vent that equalises internal pressure as the gearbox heats and cools, preventing seal blow-out."},
  {"id":"mt-rear-mount","node":"rearMount","label":"Transaxle Rear Mount (Hydro-Mount)","assembly":"Mounting","system":"Transmission","tier":"primary","function":"Rear rubber hydro-mount supporting the gearbox tail and isolating driveline vibration from the chassis."},
  {"id":"mt-mount-console","node":"mtMountConsole","label":"Transaxle Mount Console / Bracket","assembly":"Mounting","system":"Transmission","tier":"sub","parent":"mt-rear-mount","function":"Bracket bolting the hydro-mount to the chassis subframe, carrying the transaxle's vertical and lateral loads."},
  {"id":"mt-reverse-switch","node":"reverseLightSwitch","label":"Reverse-Light Switch","assembly":"Electrical","system":"Transmission","tier":"primary","function":"Switch on the case top-rear that closes the reverse-lamp circuit when reverse gear is engaged."},
  {"id":"mt-ground-strap","node":"groundStrap","label":"Transmission Ground Strap","assembly":"Electrical","system":"Transmission","tier":"sub","parent":"mt-case","function":"Braided strap grounding the transaxle case to the body so starter and sensor currents have a return path."}
]}