Section 10 · Pages 221–230 (10 pages)

Automatic and Manual Transmission Controls

From the 1987 GMC Light Duty Truck Fuel, Emissions and Driveability Manual

The torque converter clutch system on the 700-R4, the ECM-controlled detent downshift system on THM 400 transmissions, and the manual transmission shift light, with TCC electrical diagnosis for 2.5L and 2.8L and for 4.3L and V8 engines, downshift control diagnosis and on-vehicle service.

Read this section free, starting at page 221

What this section covers

  • TCC system operation
  • THM 400 downshift control
  • Manual transmission shift light
  • TCC electrical diagnosis
  • Downshift control diagnosis
Year
1987, 1988
Make
GMC
Vehicle
C/K Trucks, G Vans, Light Duty Trucks, M Vans (Astro/Safari), P Forward Control, R/V Trucks, S/T Trucks, Trucks
Type
Fuel & Emissions, Supplement
Models
R/V, G, P, S/T, M 10–30; 1988 C/K
Publication
X-8736
Pages
262

What’s inside

Fuel and emissions manual

  1. 1General Informationpp. 7–22
  2. 2Driveability Symptomspp. 23–28
  3. 3Computer Command Controlpp. 29–138
  4. 4Fuel Control (TBI 220 and TBI 700)pp. 139–182
  5. 5Evaporative Emission Control System (EECS)pp. 183–188
  6. 6Ignition System and ESTpp. 189–196
  7. 7Electronic Spark Controlpp. 197–200
  8. 8Air Management Systempp. 201–210
  9. 9Exhaust Gas Recirculation (EGR) Systempp. 211–220
  10. 10Automatic and Manual Transmission Controlspp. 221–230
  11. 11Positive Crankcase Ventilation (PCV)pp. 231–234
  12. 12Thermostatic Air Cleaner (THERMAC)pp. 235–240
  13. 13Special Tools and Specificationspp. 241–248
  14. 14Abbreviations and Glossary of Termspp. 249–252
  15. IndexAlphabetical index of subjects with section and page references, followed by reply cards.pp. 253–262

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