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Code po785 No down shift no overdrive

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It wont shift into overdrive the transmission has pressure I changed to fluids when I go to pass it wont shift into overdrive


strange as it may sound, transmissions do not shift into overdrive to pass
they down shift a ratio to get extra torque from the motor and will stay down shifted until the vacuum actuator shifts it back and only then when the VSS reports to the TCM that a ratio change up is needed will the overdrive click in
If you cannot get OD under any circumstances run the fault codes and check for a problem overdrive servo/ solenoid , TCM unit

Apr 24, 2016 | 2007 Dodge Ram Truck

1 Answer

98 chevy blazer has po785 code will not downshift will shift manually


this is a link you can use to help find what you need to repair the shifting problem, by what i'm reading it has more to do with the timing of the ing. switch than it does with the transmission.
http://www.automotiveforums.com/vbulletin/showthread.php?t=287636

Sep 09, 2015 | Cars & Trucks

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1999 blazer code po785 ?


When the Powertrain Control Module (PCM) detects a continuous open, short to ground or short to power in the 3-2 SS valve assembly circuit, then DTC P0785 sets.

Possible cause are
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shifting solenoid valve
- Shifting solenoid valve harness is open or shorted
- Shifting solenoid valve circuit poor electrical connection

Aug 14, 2014 | 1999 Chevrolet Blazer

2 Answers

Tahoe problems


transmission control selonoid

Dec 15, 2013 | Cars & Trucks

1 Answer

97 GMC YUKON 5.7 4X4, HAS A PO785 CODE......WHEN FIRST STARTED IT SHIFTS AS IT SHOULD. BUT AFTER ITS WARMED UP AND I STOP AT A STOP SIGN I COMPLETELY LOSE OVERDRIVE AND IT WON'T DOWN SHIFT. I HAVE TO...


HERE WE ARE AGAIN STILL SAME ISSUES AFTER CHANGING ALL 5 SOLENOIDS,FLUID,FILTER AND EVEN THE INTERNAL WIRING HARNESS IN 4L60 TRANSMISSION IN A 97 YUKON. STILL GETTING A P0785 CODE. WHEN 1ST STARTED SHIFT PERFECT TILL IT WARMED UP AND I MAKE A COMPLETE STOP. THEN IT WON'T DOWN SHIFT AT ALL AND I HAVE NO OVERDRIVE. HAVE NEVER HAD ANY PROBLEMS WITH TRANS TILL IT STARTED DOING THIS OUT OF THE BLUE. NO SLIPPAGE NO BURNT FLUID EITHER. I'M TOTALLY LOST AND DON'T WHAT ELSE TO DO. CAN ANYONE PLEASE POINT ME IN THE RIGHT DIRECTION? PLEASE EMAIL imhausen72@gmail.com

Sep 25, 2013 | 1997 GMC Jimmy

1 Answer

Po700 and po785


The P0700 means Transmission Control System (MIL Request), and the P0785 means Shift/Timing Solenoid.
---------
careucar=care your car!

Nov 13, 2012 | 2002 Volvo S60

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What does P0785 mean


PO785 is a shift solenoid malfunction code. Could be just solenoids that need replacement. If it has the GM trans, it's a big job as solenoids are under side cover of trans axle. Sub frame removal required. Pete

Feb 08, 2012 | 2000 Volvo V70

2 Answers

My 2006 Chevy Avalanche's check engine light came on last weekend. We checked the fuses, the air filter and the gas cap. The light went out. Then my truck slowly exhilerated in drive. It's automatic. It...


All these code's are to your transmission, your mech needs to do more then pull code's, he needs to look at date on sensor to transmission before opening.

P0740 - Torque converter clutch solenoid circuit

P0758 - Shift solenoid (B) electrical

P0785 - Shift timing solenoid

P0761 - Shift solenoid (C) performance or stuck off

I would try Trans - X first pores right in to trans.

Jan 15, 2010 | 2006 Chevrolet Avalanche

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