Chevrolet Full Size Cars 1979-1989

Introduction

Imprimir

Before making any linkage adjustments, check the injection timing, and adjust if necessary. Also note that these adjustments should be performed together. The vacuum valve adjustment (THM 350s only) requires the use of special tools. If you do not have these tools at your disposal, refer to the adjustment to a qualified, professional technician.

For most applications, the automatic transmission adjustments on a given transmission should be the same whether it is mated with a gasoline or diesel engine. Subtle differences may occur if the adjustment is somehow related to the fuel system, such as some detent or throttle valve adjustments. The following procedures are for Chevrolet full size vehicles which are equipped with a diesel engine. For additional adjustments which are not listed here, refer to the gasoline adjustments earlier in this section.

THROTTLE ROD





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Fig. Fig. 1 Throttle Linkage Diesel vehicles

  1. If equipped with cruise control, remove the clip from the control rod, then remove the rod from the bellcrank.
  2.  
  3. Remove the throttle valve cable (THM 200) or detent cable (THM 350) from the bellcrank.
  4.  
  5. Loosen the locknut on the throttle rod, then shorten the rod several turns.
  6.  
  7. Rotate the bellcrank to the full throttle stop, then lengthen the throttle rod until the injection pump lever contacts the injection pump full throttle stop. Release the bellcrank.
  8.  
  9. Tighten the throttle rod locknut.
  10.  
  11. Connect the throttle valve or detent cable and cruise control rod to the bellcrank. Adjust if necessary.
  12.  

THROTTLE VALVE (TV) OR DETENT CABLE





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Fig. Fig. 2 Detent cable adjustment Diesel engines

Refer to the previous cable adjustment procedures for gasoline engines. Adjust according to the style of cable which is used.

TRANSMISSION VACUUM VALVE





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Fig. Fig. 3 Angle gauge with adaptor for diesel vacuum valve adjustment NOTE: the gauge is positioned differently depending upon type of throttle lever



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