Will not downshift

1998 GMC JIMMY
100,000 MILES
Avatar
CARLLEHN
  • MEMBER
  • 2 POSTS
All idiot lights are on. Temperature gauge is not working. The transmission will not downshift. It is stuck in 3rd gear. Check engine light is on. Code Checker reads:
PO740: Torque Converter Cluth soleniod circut open.
PO753: Sift Soleniod 'A' Electorical
PO&85 Shift/Timing Soleniod Malfunction
P1860 Torque Converter Cluth Pule width Modulation Soleniod Circut.
What do you suggest? Thank you.
Oct 13, 2011 at 11:49 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
A new trans (lol) Honestly, I would start with the TCC solenoid. Check for an open circuit and repair that first. I believe that will take care of at least 2 of the other codes. My concern then is the modulation solenoid.
Oct 13, 2011 at 11:52 PM
Advertisement