ATSG GM 6T30-40-45-50

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" 2 0 1 5 ” S E M I N A R I N F O R M A T I O N  GM 6T30/40/45/50 GENERATION I & II INFORMATION

Generation 1 Pressure Switches. These pressure switches are used for adaptive control by monitoring clutch regulating valve activity and clutch hydraulic operation.  SOLENOID LOCA LOCATIONS TIONS AND IDENTIFICA IDENTIFICATION TION (GEN 1 & 2) *GEN1 ONLY HAS PRESSURE SWITCHES  TCM   Line Pressure Control Solenoid  (Normally High)

TFPS3*  3-5-R

TFPS2*  2-6 

TFPS1*  1-2-3-4 TFPS4*  4-5-6-R1

Clutch Pressure Control Solenoid 3 (Normally High) (R1- 4-5-6 Clutch)

Clutch Pressure Control Solenoid 4 (Normally Low) (2-6 Clutch) Clutch Pressure Control Solenoid 5 (Normally Low) (1-2-3-4 Clutch) (GEN1) Clutch Pressure Control Solenoid 2 (Normally Low) (3-5-R Clutch)  Shift  (GEN2)  Solenoid  (On-Off)

 Solenoid Body TCC Pressure Control Solenoid  (Normally Low)

Clutch Pressure Control Solenoid 2 (Normally High) (3-5-R Clutch) (GEN1) Clutch Pressure Control Solenoid 5 (Normally High) (1-2-3-4 Clutch) (GEN2)

Figure 19 Generatio Genera tion n 1 use usess Vari ariable able Ble Bleed ed typ typee sol solenoi enoids ds whi while le Gene Generat ration ion 2 use usess Vari ariabl ablee Feed typ typee sol soleno enoids ids.. Not Notice ice the difference in the way General Motors presents their hydraulic schematics between the two in Figure 20. Generation 1 solenoid and pressure switches displayed in the upper hydraulic while Gen 2 without pressure switch swi tches es in the low lower er sch schema ematic tic.. The dif differ ferent ent sol solenoi enoid d conf configu igurat ration ionss bet betwee ween n the two sch schema ematic ticss rep repres resent entss the change chan ge fr from om one sol solenoi enoid d typ typee to anot another her..

Figure 20 Copyright Copyri ght © 2015 ATSG

Automatic Transmission Service Group