Section 4 · Pages 15–30 (16 pages)

Rear End Suspension

From the 1946-1947 Pontiac Shop Manual Supplement

The 1947 rear axle with a tapered roller pinion bearing differential and new 11-tooth crowned differential pinions. Procedures cover replacing the companion flange and pinion bearing oil seal with an inch-pound torque wrench and J-2983 and J-962 tools. Also covered are tightening rear spring U-bolts and diagnosing axle noise and bearing failure. Overhaul pages explain pinion shimming and differential bearing adjustment by notches tight. Tooth contact illustrations show correct and incorrect backlash and pinion depth. Rear axle specifications list gear ratios by axle shaft color code.

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What this section covers

  • Tapered roller pinion bearing differential
  • Companion flange and pinion oil seal replacement
  • Rear axle noise diagnosis
  • Differential bearing adjustment
  • Ring gear and pinion tooth contact
  • Rear axle specifications and gear ratios
Year
1946, 1947
Make
Pontiac
Vehicle
Components and Systems, Passenger Cars, Radios
Type
Service Manual, Supplement
Models
Torpedo Six (25), Torpedo Eight (27), Streamliner Six (26), Streamliner Eight (28); radios 984170-984172
Publication
PS-1704
Pages
123

What’s inside

Chassis supplement

  1. Title page and section indexTitle page with the section index, model numbers, wheelbases and 1946 starting serial numbers by assembly plant, followed by a Service News reference sheet.pp. 1–2
  2. 0General Lubricationpp. 3–11
  3. 1BodyBody style numbers for models 25, 27, 26 and 28, notes on door and rocker panel drainage and inner panel priming, and removal of the accelerator pedal to fit the front floor mat.pp. 12–13
  4. 2Frame and Front-End SuspensionA note on the heavier rear spring front bracket and longer bolt on 1946–1947 frames. A second note says the 1942 front-end suspension instructions still apply.pp. 14–14
  5. 4Rear End Suspensionpp. 15–30
  6. 5BrakesThe rest of the rear axle specifications, plus a note that the 1942 brake instructions apply to 1946–1947 models.pp. 31–31
  7. 6Engine MechanicalEngine changes for 1946–1947: a brass water distributing tube, 95 ft-lb flywheel bolts and the six-cylinder rear main bearing oil seal groove. Other notes cover shot-peened piston pins, pistons, plated piston rings, exhaust valve guide counterbores and connecting rod cap identification.pp. 32–33
  8. 6AEngine Cooling and OilingWater pump changes, including the extended brass slinger and the pinned carbon washer. The page also opens the engine fuel section with notes on the 1946 Carter WDO-548S eight-cylinder carburetor.pp. 34–34
  9. 6BEngine Fuel: Carter WA1-537S Six-Cylinder Carburetorpp. 35–47
  10. 6BEngine Fuel: Carter WCD-630S Eight-Cylinder Carburetorpp. 48–62
  11. 6CEngine ClutchThe ball bearing clutch release on a tubular support used on 1946–1947 sixes and eights. It covers driven plate identification by spring color, clutch removal and replacement with alignment tool J-493, and release bearing lubrication.pp. 63–65
  12. 7Transmission, Fuel Tank and Exhaust, SteeringTransmission main drive gear changes, including the felt oil seal and oil slinger, for the ball-type clutch release bearing. Short notes say the 1942 fuel and exhaust and steering gear instructions still apply.pp. 66–66
  13. 10Wheels and Tires, Chassis Sheet MetalTire pressures (28 lbs.), the 5-inch rim, mounting synthetic tubes, bumper jack use and rear fender removal.pp. 67–68
  14. 12Electrical and AccessoriesChanges to the starting motor, ignition coil and current regulator adjustment, and Sea Shell horns. The directional signal section covers operation, bulb specifications and a wiring diagram.pp. 69–71

Radio and antenna service

  1. 14Radio Antenna Installationpp. 72–75
  2. 14Radio Installation and Testingpp. 76–84
  3. Radio Minor Service and Interference Eliminationpp. 85–89
  4. Master Radio 984170 Major Servicepp. 90–93
  5. DeLuxe Radio 984171 Major Servicepp. 94–101
  6. Super DeLuxe Radio 984172 Servicepp. 102–107
  7. Radio WarrantyThe 90-day radio warranty, the installation record required for warranty service, and what dealers must cover under the labor policy.pp. 108–109
  8. Radio Service Parts Listspp. 110–119
  9. Radio DataA table of Pontiac radio models from 1938 to 1946–1947 with serial numbers, tube complements, battery current, B+ volts, I.F. and R.F. frequencies and vibrator type.pp. 120–122

Index

  1. IndexAlphabetical general index and separate radio index, with printed page numbers.pp. 123–123

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