TRNW-2: 10L80 question

[Tod Chretien]

I don't think the wrong fluid will cause that code. Unless the fluid 
already caused a failure.

DTC P0797

    Transmission Control Solenoid Valve 3 Stuck On


      Diagnostic Fault Information

*Note:*

  * DTC P0796 will set with a hydraulic/mechanical condition or high
    resistance in the circuit of the component Q77B without setting
    component/control circuit DTCs.
  * DTC P0797 will set with a hydraulic/mechanical condition.
  * The components are listed from the least to the most intrusive to
    service.

*Component* 	*DTC* 	*Condition*
Q77C Transmission Control Solenoid Valve 3 	P0796, P0797 	

  * Binding, sticking or stuck component: Solenoid Valve
  * Damaged or missing component:
      o Retaining Clip
      o Solenoid Valve

  * 2-3-4-5-7-9-10 and 4-5-6-7-8-9-10-Reverse Clutch Regulator Valve
  * Valve Spring
  * Valve Body Bore

	P0796, P0797 	

  * Binding, sticking or stuck component: Valve
  * Debris on the component.
  * Damaged component:
      o Valve or Bore — Scored
      o Spring

2-3-4-5-7-9-10 Clutch Assembly Oil Feed Circuit 	P0796, P0797 	Blocked 
or restricted component: Screen
2-3-4-5-7-9-10 Clutch Assembly 	P0796, P0797 	

  * Blocked or restricted component: Fluid/oil passage
  * Leaking component:
      o Clutch Piston
      o Clutch Housing
      o Gasket
      o O-Ring
      o Seal
  * Binding, sticking or stuck component: Clutch Plates
  * Damaged or worn component:
      o Clutch Plates
      o Clutch Piston
      o Clutch Housing



On 4/18/2025 3:59 PM, Ryan D via trnw2 wrote:
> I have a shop that put dex 6 in a 10L80. What would this cause? Can 
> the fluid be changed to fix it?
> They said it has a code p0797 now.
>
>
> -- 
> Ryan
>
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-- 
Best Regards,
Tod Chretien
TRNW inc.
https://www.trnw.net
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