{"glb":"/models/components/trans.glb","parts":[
  {"id":"pdk-transaxle","node":"gearCase","label":"PDK Transaxle Case","assembly":"Gearbox","system":"Transmission","tier":"primary","partNumber":"9G2.300.011.05","componentId":"trans","function":"The main alloy gear case housing the 7-speed PDK dual-clutch gear sets, shafts, and final drive."},
  {"id":"pdk-hsg-001","node":"pdkBellhousing","label":"PDK Bellhousing / Transmission Case (Main)","assembly":"PDK Housing","system":"Transmission","tier":"primary","partNumber":"9G2.300.021.05","function":"Aluminium alloy main structural case that encloses the entire PDK gear set and clutch assembly."},
  {"id":"pdk-hsg-002","node":"pdkEndCover","label":"PDK End Cover / Rear Cover","assembly":"PDK Housing","system":"Transmission","tier":"primary","partNumber":"9G1.321.360.00","function":"Rear closing plate that seals the transmission case and provides bearing support at the tail end."},
  {"id":"pdk-hsg-003","node":"pdkOilPan","label":"PDK Oil Pan (Lower Sump)","assembly":"PDK Housing","system":"Transmission","tier":"primary","partNumber":"9G1.321.025.00","function":"Lower sump that holds PDK-specific Pentosin FFL-2 fluid and houses the internal fluid filter. Removed for every fluid service."},
  {"id":"pdk-hsg-004","node":"pdkOilPan2","label":"PDK Oil Pan (Alternate / Revised Sump)","assembly":"PDK Housing","system":"Transmission","tier":"sub","parent":"pdk-hsg-003","partNumber":"9G1.321.125.00","function":"Revised-specification lower sump used on later production runs; check production date before ordering."},
  {"id":"pdk-hsg-005","node":"pdkHousingNeck","label":"PDK Housing Filler Neck","assembly":"PDK Housing","system":"Transmission","tier":"sub","parent":"pdk-hsg-003","partNumber":"9G1.321.059.00","function":"Filler neck on the transmission case through which PDK fluid is added after a drain service."},
  {"id":"bell-housing","node":"bellHousing","label":"Clutch / Bell Housing","assembly":"Gearbox","system":"Transmission","tier":"primary","partNumber":"9G2.116.237.00","function":"The bell housing at the engine end that encloses the dual-clutch pack and mates to the engine."},
  {"id":"bell-flange","node":"bellFlange","label":"Engine Mounting Flange / Retaining Plate","assembly":"Gearbox","system":"Transmission","tier":"sub","parent":"bell-housing","partNumber":"9G2.307.255.00","function":"Bolt flange / retaining plate that secures the PDK bellhousing to the rear face of the engine block."},
  {"id":"pdk-cl-001","node":"pdkDualClutchPack","label":"Dual Wet Clutch Pack Assembly (K1 + K2)","assembly":"Dual Clutch","system":"Transmission","tier":"primary","partNumber":"9G2.116.237.01","function":"Concentric wet multi-plate clutch pair where K1 engages odd gears and K2 engages even gears. Replaced as part of mechatronic service."},
  {"id":"pdk-cl-002","node":"pdkClutchActuatorCylinder","label":"Clutch Actuation Cylinder (Electro-Hydraulic)","assembly":"Dual Clutch","system":"Transmission","tier":"primary","partNumber":"9G2.116.237.00","function":"Electro-hydraulic cylinder that applies and releases each clutch pack under TCU command during gear selection."},
  {"id":"pdk-cl-003","node":"pdkTorsionalDamper","label":"Torsional Damper / Flex Plate Adapter","assembly":"Dual Clutch","system":"Transmission","tier":"primary","partNumber":"981.303.051.00","function":"Replaces the conventional flywheel and connects the engine crankshaft to the PDK input with torsional damping."},
  {"id":"transaxle-new-001","node":"pdkReleaseBearing","label":"Clutch Release Bearing","assembly":"Dual Clutch","system":"Transmission","tier":"sub","parent":"pdk-cl-002","partNumber":"997.116.080.02","function":"Concentric slave cylinder-type release bearing that disengages the clutch pack on hydraulic command from the TCU."},
  {"id":"pdk-gear-001","node":"pdkInputShaft1","label":"Input Shaft 1 (Inner, Odd Gears 1-3-5-7)","assembly":"Gear Shafts","system":"Transmission","tier":"primary","partNumber":"9G2.300.011.05","function":"Solid inner input shaft driven by K1 clutch that carries 1st, 3rd, 5th, and 7th gear drive gears. Not serviceable separately — references complete PDK unit."},
  {"id":"pdk-gear-002","node":"pdkInputShaft2","label":"Input Shaft 2 (Outer, Even Gears 2-4-6-R)","assembly":"Gear Shafts","system":"Transmission","tier":"primary","partNumber":"9G2.300.021.05","function":"Hollow outer input shaft concentric with shaft 1, driven by K2 clutch, carrying 2nd, 4th, 6th, and reverse gears. Not serviceable separately."},
  {"id":"pdk-gear-003","node":"pdkOutputLayShafts","label":"Output Shaft / Lay Shafts","assembly":"Gear Shafts","system":"Transmission","tier":"primary","partNumber":"9G1.332.804.00","function":"Lay shafts that receive torque from the input shafts via the selected gear set and deliver it to the final drive pinion."},
  {"id":"pdk-gear-004","node":"pdkGearSets","label":"Gear Sets (1st through 7th + Reverse)","assembly":"Gear Shafts","system":"Transmission","tier":"primary","partNumber":"9G1.332.806.00","function":"Seven forward and one reverse helical-cut gear pairs providing the PDK ratio spread. Replaced with complete unit only."},
  {"id":"pdk-gear-005","node":"pdkSynchronizerRings","label":"Synchronizer Rings and Hubs (x7)","assembly":"Gear Shafts","system":"Transmission","tier":"primary","partNumber":"9G1.302.375.00","function":"Blocker rings and hubs that match shaft speeds before dog engagement during pre-selected gear changes."},
  {"id":"pdk-gear-006","node":"pdkSelectorForks","label":"Gear Selector Forks and Rods","assembly":"Gear Shafts","system":"Transmission","tier":"primary","partNumber":"981.303.121.01","function":"Electrohydraulically actuated selector forks that slide synchronizer sleeves to engage the pre-selected gear."},
  {"id":"pdk-hcu-001","node":"pdkValveBody","label":"PDK Hydraulic Control Unit / Valve Body","assembly":"Hydraulic Control","system":"Transmission","tier":"primary","partNumber":"9G1.317.015.05","function":"Central valve body containing all shift solenoids and pressure regulators that direct fluid to clutches and selector actuators. Integral to the mechatronic unit."},
  {"id":"pdk-hcu-002","node":"pdkShiftSolenoids","label":"PDK Electro-Hydraulic Shift Solenoids","assembly":"Hydraulic Control","system":"Transmission","tier":"primary","partNumber":"9G1.317.697.00","function":"Proportional solenoids within the HCU that modulate hydraulic pressure for clutch engagement and gear selection."},
  {"id":"pdk-hcu-002b","node":"pdkSolenoidConnector","label":"PDK Mechatronic Connector Housing (B)","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"pdk-hcu-002","partNumber":"9G1.317.698.00","function":"Secondary wiring harness connector housing that interfaces the external loom to the mechatronic solenoid block."},
  {"id":"pdk-hcu-003","node":"pdkFluidPump","label":"PDK Fluid Pump (Electric)","assembly":"Hydraulic Control","system":"Transmission","tier":"primary","partNumber":"981.307.023.00","function":"Electric oil pump that maintains PDK system line pressure independently of engine speed, enabling stop-start and launch control."},
  {"id":"pdk-hcu-004","node":"pdkFluidFilter","label":"PDK Fluid Filter and Oil Strainer","assembly":"Hydraulic Control","system":"Transmission","tier":"primary","partNumber":"9G1.321.125.00","function":"Filter assembly that removes particulate contamination from the PDK hydraulic fluid circuit. Replaced at every fluid change."},
  {"id":"pdk-hcu-005","node":"pdkFluidTempSensor","label":"PDK Fluid Temperature Sensor","assembly":"Hydraulic Control","system":"Transmission","tier":"primary","partNumber":"981.606.420.00","function":"NTC sensor that monitors PDK fluid temperature so the TCU can adjust shift strategy and protect the clutch packs."},
  {"id":"transaxle-new-002","node":"pdkHeatExchanger","label":"PDK Fluid Heat Exchanger / Oil Cooler","assembly":"Hydraulic Control","system":"Transmission","tier":"primary","partNumber":"9G2.307.017.00","function":"Water-to-oil heat exchanger that regulates PDK fluid temperature by exchanging heat with the engine coolant circuit."},
  {"id":"trans-cool-001","node":"pdkCoolHose1","label":"PDK Cooler Water Hose (Supply)","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"transaxle-new-002","partNumber":"9G2.307.074.00","function":"Water supply hose from the engine cooling circuit to the PDK oil-to-water heat exchanger."},
  {"id":"trans-cool-002","node":"pdkCoolHose2","label":"PDK Cooler Water Hose (Return)","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"transaxle-new-002","partNumber":"9G2.307.075.01","function":"Return water hose from the PDK heat exchanger back to the engine coolant circuit."},
  {"id":"trans-cool-003","node":"pdkCoolHose3","label":"PDK Cooler Oil Hose","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"transaxle-new-002","partNumber":"9G2.307.076.01","function":"Transmission fluid hose linking the PDK oil circuit to the heat exchanger inlet/outlet."},
  {"id":"trans-oil-001","node":"pdkOilPressureLine","label":"PDK Fluid Pressure Line","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"pdk-hcu-003","partNumber":"9G2.307.085.05","function":"High-pressure oil pipe from the PDK pump outlet to the hydraulic control unit / valve body."},
  {"id":"trans-oil-002","node":"pdkOilReturnLine","label":"PDK Fluid Return Line","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"pdk-hcu-003","partNumber":"9G2.307.087.05","function":"Return line that routes low-pressure fluid from the valve body back to the PDK sump."},
  {"id":"trans-oil-003","node":"pdkVacuumHose","label":"PDK Vent / Vacuum Hose","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"pdk-hsg-003","partNumber":"9G1.307.675.00","function":"Breather hose that vents internal transmission pressure to prevent seal blow-out and oil leakage."},
  {"id":"trans-oil-004","node":"pdkMoldedHose","label":"PDK Moulded Coolant Hose","assembly":"Hydraulic Control","system":"Transmission","tier":"sub","parent":"transaxle-new-002","partNumber":"9G1.307.673.00","function":"Pre-formed rubber hose connecting the coolant circuit to the PDK heat exchanger with a specific routed shape to avoid hot surfaces."},
  {"id":"final-drive","node":"finalDrive","label":"Final Drive / Differential Assembly","assembly":"Final Drive","system":"Transmission","tier":"primary","partNumber":"981.561.923.00","function":"The complete final-drive gear set and differential that splits torque to the two rear driveshafts at the PDK 3.889:1 final ratio."},
  {"id":"pdk-fd-001","node":"pdkFinalDriveGearSet","label":"Hypoid Final Drive / Ring and Pinion","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"final-drive","partNumber":"9G1.116.807.00","function":"3.889:1 hypoid ring-and-pinion gear set stepping down gearbox output speed. Shaft oil seal adjacent to pinion preload bearing."},
  {"id":"pdk-fd-002","node":"pdkDifferential","label":"Open Differential or LSD (Optional)","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"final-drive","partNumber":"9G1.307.245.00","function":"Standard open differential (or optional torque-vectoring LSD) that distributes final drive torque between the rear wheels."},
  {"id":"pdk-fd-003","node":"pdkDriveFlanges","label":"Drive Flanges / Output Flanges (x2)","assembly":"Final Drive","system":"Transmission","tier":"primary","partNumber":"9G2.332.208.05","function":"Splined flanges bolted to each side of the differential that accept the rear driveshaft CV joints."},
  {"id":"output-flange-l","node":"outputFlangeL","label":"Output Flange Left","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"pdk-fd-003","partNumber":"9G2.332.208.05","function":"Left-side drive flange connecting the differential to the left rear half-shaft CV joint."},
  {"id":"output-flange-r","node":"outputFlangeR","label":"Output Flange Right","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"pdk-fd-003","partNumber":"9G2.332.209.05","function":"Right-side drive flange connecting the differential to the right rear half-shaft CV joint."},
  {"id":"pdk-fd-004","node":"pdkRearDriveshafts","label":"Rear Driveshafts / Half-Shafts (x2)","assembly":"Final Drive","system":"Transmission","tier":"primary","partNumber":"981.332.024.00","function":"CV axles with tripod outer and ball-type inner joints transmitting final drive torque to each rear wheel hub."},
  {"id":"transaxle-new-003","node":"pdkOutputShaftSeal","label":"Output Shaft Oil Seal (Drive Flange Seal)","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"output-flange-l","partNumber":"9G2.332.803.00","function":"Radial lip seal at each output flange preventing PDK fluid leakage where the driveshaft exits the differential housing. Replace at every driveshaft removal."},
  {"id":"trans-seal-001","node":"pdkSeal1","label":"PDK End Cover Seal Ring","assembly":"PDK Housing","system":"Transmission","tier":"sub","parent":"pdk-hsg-002","partNumber":"9G1.307.891.00","function":"Sealing ring at the rear end cover interface that prevents fluid seepage between the housing and end plate."},
  {"id":"trans-seal-002","node":"pdkInputShaftSealExt","label":"Input Shaft Oil Seal (External)","assembly":"Gearbox","system":"Transmission","tier":"sub","parent":"bell-housing","partNumber":"9G1.116.807.00","function":"External shaft oil seal at the bell housing face that prevents PDK fluid migrating toward the engine crankshaft seal."},
  {"id":"transaxle-new-006","node":"pdkInputShaftSeal","label":"Input Shaft / Intermediate Shaft Seal Ring","assembly":"Gearbox","system":"Transmission","tier":"sub","parent":"pdk-cl-001","partNumber":"9G1.302.375.00","function":"Internal sealing ring between the dual concentric input shafts preventing cross-leak between the two clutch oil circuits."},
  {"id":"transaxle-new-007","node":"pdkOilSumpSeal","label":"PDK Oil Pan Gasket / Seal","assembly":"PDK Housing","system":"Transmission","tier":"sub","parent":"pdk-hsg-003","partNumber":"9G1.321.259.00","function":"Sealing gasket between the lower oil pan and the main transmission case. Always replace when removing the sump."},
  {"id":"transaxle-new-008","node":"pdkEndCapSeal","label":"PDK End Cap O-Ring","assembly":"PDK Housing","system":"Transmission","tier":"sub","parent":"pdk-hsg-002","partNumber":"9G2.321.815.00","function":"O-ring sealing the rear end cap to the transmission case, preventing fluid loss at the gearbox tail."},
  {"id":"trans-fastener-001","node":"pdkSumpBolt","label":"PDK Sump Torx Bolt (x8)","assembly":"PDK Housing","system":"Transmission","tier":"sub","parent":"pdk-hsg-003","partNumber":"9G1.321.801.00","function":"Torx-head bolt securing the PDK oil pan to the transmission case. Single-use — replace on every sump removal."},
  {"id":"drain-plug","node":"drainPlug","label":"Fluid Drain Plug","assembly":"Service","system":"Transmission","tier":"primary","partNumber":"970.321.805.00","function":"Bottom plug removed to drain PDK fluid. Uses a fibre sealing washer — replace washer at every service."},
  {"id":"trans-drain-seal","node":"drainPlugSeal","label":"Drain Plug Sealing Washer","assembly":"Service","system":"Transmission","tier":"sub","parent":"drain-plug","partNumber":"000.256.000.61","function":"Crush-type aluminium or fibre sealing washer under the PDK drain plug. Single-use — must be replaced every time the drain plug is removed."},
  {"id":"fill-plug","node":"fillPlug","label":"Fluid Fill / Level Plug","assembly":"Service","system":"Transmission","tier":"primary","partNumber":"9G1.321.825.01","function":"Side plug used to set the PDK fluid level when refilling. Fill until fluid dribbles from this port with gearbox at operating temperature."},
  {"id":"trans-fluid-001","node":"pdkFluid","label":"PDK Transmission Fluid (Pentosin FFL-3)","assembly":"Service","system":"Transmission","tier":"primary","partNumber":"000.043.305.48","function":"Factory-specified PDK fluid (approx. 7.2 L fill). Do not substitute with standard ATF — incorrect fluid destroys the wet clutch packs."},
  {"id":"selector-housing","node":"selectorHousing","label":"Selector / Mechatronic Housing","assembly":"Controls","system":"Transmission","tier":"primary","partNumber":"9G1.324.135.00","function":"Houses the gear-selection mechanism and shift control linkage integrated into the top of the PDK case."},
  {"id":"mechatronic","node":"mechatronic","label":"Mechatronic Control Unit (Valve Body + TCU)","assembly":"Controls","system":"Transmission","tier":"primary","partNumber":"9G1.317.015.05","function":"Combined hydraulic/electronic module that actuates clutches and gear shifts. Major service item — Porsche refurbish programme available."},
  {"id":"transaxle-new-004","node":"pdkSelectorShaft","label":"Gear Selector Shaft","assembly":"Controls","system":"Transmission","tier":"sub","parent":"mechatronic","partNumber":"9G2.302.377.00","function":"Internal selector shaft translating gear lever / mechatronic commands into mechanical engagement of the synchronizer forks."},
  {"id":"pdk-ctrl-001","node":"pdkTcu","label":"PDK TCU / Transmission Control Module","assembly":"PDK Control","system":"Transmission","tier":"primary","partNumber":"9G1.317.015.05","function":"Bosch TCU managing all PDK shift logic, clutch pressure, and driver-mode strategies via CAN bus with the DME."},
  {"id":"pdk-ctrl-002","node":"pdkGearSelectorUnit","label":"PDK Gear Selector Unit (Cabin)","assembly":"PDK Control","system":"Transmission","tier":"primary","partNumber":"9G1.324.135.00","function":"Centre-console push-button selector providing D/R/N/P positions plus Sport and Sport+ mode input to the TCU."},
  {"id":"pdk-ctrl-003","node":"pdkShiftPaddles","label":"PDK Steering Wheel Shift Paddles","assembly":"PDK Control","system":"Transmission","tier":"primary","partNumber":"9G2.426.033.10","function":"Column-fixed paddles that send manual upshift and downshift requests to the TCU for driver-initiated gear changes."},
  {"id":"pdk-ctrl-004","node":"pdkSpeedSensors","label":"PDK Rotational Speed Sensors (Input + Output)","assembly":"PDK Control","system":"Transmission","tier":"primary","partNumber":"981.606.303.00","function":"Hall-effect sensors on input and output shafts providing real-time speed data for clutch slip and shift-point control."},
  {"id":"rear-mount","node":"rearMount","label":"Transaxle Rear Mount (Hydro-Mount)","assembly":"Mounting","system":"Transmission","tier":"primary","partNumber":"981.375.049.02","function":"Rear rubber hydro-mount supporting the gearbox tail and isolating driveline vibration from the chassis."},
  {"id":"transaxle-new-005","node":"pdkTransaxleMountConsole","label":"Transaxle Mount Console / Bracket","assembly":"Mounting","system":"Transmission","tier":"sub","parent":"rear-mount","partNumber":"981.375.195.00","function":"Structural console bolting the hydro-mount to the chassis subframe, carrying transaxle vertical and lateral loads."},
  {"id":"transaxle-new-009","node":"pdkSnapRing","label":"Drive Flange Snap Ring / Retaining Circlip","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"output-flange-l","partNumber":"9G1.332.820.00","function":"Circlip retaining the output drive flange axially within the differential bearing carrier."},
  {"id":"transaxle-new-010","node":"pdkBearingBush","label":"Differential Bearing Bush","assembly":"Final Drive","system":"Transmission","tier":"sub","parent":"final-drive","partNumber":"999.203.003.00","function":"Bronze bearing bush in the differential carrier supporting the drive flange and absorbing radial loads from the half-shaft."}
]}