Pages 5–35 (31 pages)

Fundamental Principles of the Hydra-Matic Transmission

From the 1960 Pontiac Hydra-Matic Manual

How the transmission works. It starts with planetary gear trains, the fluid coupling and sprag clutches, then shows the front, rear and reverse units. Power flow diagrams cover neutral, each forward speed and reverse. Hydraulic sections describe the variable-capacity vane pump, governor, TV pressure, limit and coupling valves, and forced and part-throttle downshifts.

Read this section free, starting at page 5

What this section covers

  • Planetary gear train operation
  • Fluid coupling and sprag clutch
  • Front, rear and reverse unit relationships
  • Power flow in neutral, 1st to 4th and reverse
  • Review of unit action by speed
  • Front pump, pressure regulator and torus feed valve
  • Governor, TV pressure and accumulator valve
  • Forced 4-3, 3-2 and 2-1 downshifts
Year
1960
Make
General Motors, Pontiac
Vehicle
Components and Systems, Hydra-Matic, Passenger Cars, Transmissions
Type
Overhaul & Unit Repair, Service Manual
Models
1960 Pontiac controlled-coupling Hydra-Matic, Model P and PE
Publication
S-6004 H-M
Pages
112

What’s inside

Operation and theory

  1. Description and Operating Instructionspp. 1–4
  2. Fundamental Principles of the Hydra-Matic Transmissionpp. 5–35

Service and overhaul

  1. Periodic Service RecommendationsFluid level indicator and fill point, the 2,000 mile fluid check, the 25,000 mile fluid change interval and the new car and 2,000 mile inspection items for 1960 Pontiacs.pp. 36–36
  2. Adjustments with Transmission in CarStep-by-step adjustment of the throttle control linkage using pin J-7687, the selector lever linkage and the neutralizer (starter) switch, with idle speed and clearance settings.pp. 37–38
  3. Minor Service and RepairsServices done without removing the transmission: checking oil level, draining and refilling with fluid capacities, and replacing the rear seal, governor, pressure regulator, parking brake linkage and detent and throttle levers.pp. 39–40
  4. Remove TransmissionProcedure for removing the Hydra-Matic, rear flywheel housing and torus assembly from the car as a unit, including draining, cooler lines, propeller shaft, linkage and cross member.pp. 41–41
  5. Remove Units from Casepp. 42–48
  6. Disassemble Individual Unitspp. 49–58
  7. Cleaning and Inspectionpp. 59–69
  8. Assemble Individual Unitspp. 70–83
  9. Install Units into Casepp. 84–93
  10. Install TransmissionMounting the transmission on the engine: aligning torus cover and flex plate, checking the .015 inch flywheel clearance, reconnecting linkage, cooler adapter and propeller shaft, then refilling, adjusting and testing.pp. 94–95

Diagnosis and reference

  1. Testing and Diagnosispp. 96–103
  2. Specificationspp. 104–107
  3. Special Hydra-Matic ToolsIllustrated list of the special tools named in the procedures, such as holding fixtures, spring compressors, snap ring pliers and end play gauges, with J numbers.pp. 108–108
  4. Alphabetical Indexpp. 109–112

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