{
  "scope": "Reference interface chain and conditional photo envelope only; not fitted identity, loaded fit or working mesh.",
  "baseline_commit": "a24e7871",
  "groups": 12,
  "valid_positive_step_solids": 32,
  "drawing_journal_diameter_mm": 35.0,
  "drawing_overall_length_mm": 139.2,
  "nominal_shoulder_distance_mm": 101.6,
  "unselected_display_packing_mm": 0.1,
  "bearing_envelope_inner_face_distance_mm": 101.8,
  "shared_six_hole_pcd_mm": 109.5,
  "through_hole_diameter_comparison_mm": 10.0,
  "photo_envelope_diameter_estimate_mm": 165.0,
  "photo_homography_reproduced": true,
  "historical_260mm_wheel_shape_held": true,
  "mesh_native_relative_volume_errors": {
    "differential_open_cage_end_walls_bored_mount_and_hollow_journals": 0.001945482590083425,
    "differential_toothless_crown_wheel_boundary_without_ratio": 0.0033789832273659615,
    "differential_historical_260mm_crown_wheel_comparison": 0.001053891270329066,
    "differential_six_unthreaded_crown_wheel_bolt_envelopes": 0.0005028971872428345,
    "differential_three_flat_paired_crown_wheel_lock_tabs": 0.001063435820085723,
    "differential_left_independent_angular_contact_bearing_boundary": 0.0010537680928069948,
    "differential_right_independent_angular_contact_bearing_boundary": 0.0010537680930046145,
    "differential_left_rear_half_bearing_cap_with_shared_stud_bores": 0.00028654382972437276,
    "differential_right_rear_half_bearing_cap_with_shared_stud_bores": 0.0002865437755129596,
    "differential_front_bearing_saddles_with_open_arm_boundaries": 5.079099963878342e-05,
    "differential_four_cap_stud_nut_and_unloaded_washer_sets": 0.0005906469154569605,
    "differential_two_unselected_side_bearing_packing_envelopes": 0.0010541616992070235
  },
  "local_pair_contacts_mm3": {
    "left": {
      "cage_bearing_mm3": 0.0,
      "cap_bearing_mm3": 0.0,
      "saddle_bearing_mm3": 0.0
    },
    "right": {
      "cage_bearing_mm3": 0.0,
      "cap_bearing_mm3": 0.0,
      "saddle_bearing_mm3": 0.0
    }
  },
  "outer_case_source_contacts_mm3": {
    "differential_open_cage_end_walls_bored_mount_and_hollow_journals": {
      "rear_axle_housing_reference": 0.0,
      "differential_carrier_reference": 0.0
    },
    "differential_toothless_crown_wheel_boundary_without_ratio": {
      "rear_axle_housing_reference": 0.0,
      "differential_carrier_reference": 0.0
    },
    "differential_front_bearing_saddles_with_open_arm_boundaries": {
      "rear_axle_housing_reference": 0.0,
      "differential_carrier_reference": 0.0
    }
  },
  "open_arm_attachment_gap_source_mm": 24.264283418289484,
  "limits": "The35x72x17mm SKF bearing remains an independent envelope, not an approved2K5943/fitted cross-reference. Manufacturer nominal shoulders and journals remain separate from the unselected0.1mm display packing and actual preload. All open-cage architecture, windows, end walls, collar shoulders, spigot projection, web/bevel sections, cap/stud map and front saddle/arm boundaries remain estimates. No Quaife helical mechanism is transplanted into the stock-reference cage. Front saddles belong to the carrier casting but their arms stop at an omission boundary; connection to the exterior carrier remains unverified. Old side-gear cylinders remain optional unfit boundaries rather than being moved to the new cage. Old260mm crown-wheel geometry is retained as an optional historical comparison. No actual axle/gearset identity, ratio, hypoid offset, loaded bearing fit, tooth contact, spline fit, torque, sealing, operating clearance or verified release/removal path.",
  "source_sha256": {
    "differential-support-reference.json": "5c137ef0f736e68fe969ee55e3e9ecfde1d303e5e6aff05b1beab0ee8d3ab06e",
    "differential-support-reference.step": "9e3b0073e3ca3427c55929ea3137f2312a2684f7a781489a603b967df1e6ef69",
    "differential-interface-evidence.json": "982d00580be8d97accb30e53be3e8c3a6f6c31b026d4cc6e88a3cdcc2d2d94e9",
    "rear-axle-reference.json": "27c1c2b43d021f8a595a2f4a79ec938bb346580fe8591ef240e8cd27f42c728a",
    "rear-axle-reference.step": "b50bb0e40ebed8a6ec4cf05ccdfe63b2f32ab890dbaecb35de4d072dd678e857"
  },
  "retained_side_gear_boundary_contacts_mm3": {
    "differential_open_cage_end_walls_bored_mount_and_hollow_journals__differential_left_side_gear_boundary_reference": 26724.5234,
    "differential_open_cage_end_walls_bored_mount_and_hollow_journals__differential_right_side_gear_boundary_reference": 26724.5234,
    "differential_left_independent_angular_contact_bearing_boundary__differential_left_side_gear_boundary_reference": 52859.6526,
    "differential_right_independent_angular_contact_bearing_boundary__differential_right_side_gear_boundary_reference": 52859.6526,
    "differential_four_cap_stud_nut_and_unloaded_washer_sets__differential_left_side_gear_boundary_reference": 58.5291,
    "differential_four_cap_stud_nut_and_unloaded_washer_sets__differential_right_side_gear_boundary_reference": 58.5291,
    "differential_two_unselected_side_bearing_packing_envelopes__differential_left_side_gear_boundary_reference": 264.7452,
    "differential_two_unselected_side_bearing_packing_envelopes__differential_right_side_gear_boundary_reference": 264.7452
  }
}