Question about Chevrolet 2003 Chevrolet Blazer LS

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Po 752 what mean and what parts to fix

Code from scanner wont shift to 4th, rev to high rpm at take off, have to let off gas then it will lshift to 2nd. Then have to slowly accelarate to 3rd cant go over 50 and stalls grabbing when in motion

Posted by Kristen on


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  • 4 Answers

SOURCE: '03 suburban transmission

It might fix the problem but you may also have a shift sensor that is starting to go bad as well take you suburban to autozone or an o'reillys if you have one of those auto parts stores near you and they can do a scan on all the sensors to tell you if your vehicle is showing any problems with any of your sensors I hope this helps you out.

Posted on Jan 30, 2009


Harvey N Tawatao

  • 3854 Answers

SOURCE: 4l60e slips in 3rd and 4th

There are to many things that can cause this problem, best thing to is go get the ECM scanned for DTC codes at a transmission shop or Auto zone or Parts Source since they scan for free.
The ECM should have DTC code in it's memory on how the transmission is Performing and have the Transmission line tested for Fluid pressure.
Good luck and hope this helps. Oh and also ways check with more then on transmission shop if there tell you that you need a new Transmission,
It could be a simple as the transmission filter falling off causing the lost of transmission fluid pressure. Check the transmission fluid too.

Posted on May 07, 2009


Harvey N Tawatao

  • 3854 Answers

SOURCE: 1994 silverado 4L60E transmission not wanting to shift corrrect

If you have not worked on a 4L50E transmission before, leave it to someone who is familiar with the the 4L60E. The solenoid is in the valve body and i know some who have put things back together and needed to take it apart again over something simple as a servo pin in revers. Best thing to do is get the truck scanned at Auto Zone free of charge or at a transmission shop with a tech 2 scanner for DTC codes. If there is a bad throttle body sensor or it's misaligned, it would affect your transmission's performance. The throttle body sensor send's signals to the ECM which calculates the amount of transmission fluid pressure though out the shift points, if that signal is bad then your shift points and firmness will be affected. There is also a cheap and great performance upgrade for around $50.00. You have a Transmission shop swap out the servo's for a Corvette servo's, it can be done in 30 min with out taking the transmission down or removing the transmission oil pan off.
Recap, have the transmission fluid and oil changed and have the throttle body sensor tested. It should show a smooth gradual increase in resistance with out any fluctuation. You truck is 15 years old and it may have a dead spot on the sensor now and it may need to be replaced. Good luck and keep me posted, Be glad to help and you can also have the transmission shop do a transmission pressure line test.

Posted on Jun 23, 2009


Harvey N Tawatao

  • 3854 Answers

SOURCE: wont shift into 2nd gear revs high until it finally goes into 3rd

If there is a Auto Zone around your area, have the blazer scanned for any DTC codes that is related to the transmission issues. It could be a fault sensor, bad wires, or bad solenoid in the valve body. The scan should help indicate if there is an electrical issues or it's going to be mechanical. You can try adding a transmission additive to flush out the system and then replace the transmission filter and oil. Make sure you flush out all the transmission oil, it could be as simple as the 2nd and 4th solenoids are seized with dirt and not activating. Good luck and keep me posted. The solenoid is in the valve body and is not that expansive for the parts, you just have to find a good transmission shop that will fix this simple problem and not try to get you to put in a new transmission. 

Posted on Aug 20, 2009

Testimonial: "Thank you so much. That gave me really good information and some things to try. Hopefully that is all it will be. Thanks again!!!!"

Big Al

  • 79 Answers

SOURCE: 4l60e going from 1st to 3rd and dont have overdrive any more

You most likely have a broken sunshell inside the transmission. They tend to go out when the transmission is shifted to drive when while still rolling in reverse.

Posted on Jan 10, 2010

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1 Answer

Have a 2008 holden ve and revs high on freeway only, not all the time

could be the TPS
speed sensor faulty is
another typical fault .......code is PO 500
loss of anti-lock brakes the "anti-lock" or "brake" warning lamps on the dash may be lit the speedometer or odometer may not work properly (or at all) your vehicle's RPM limiter may be decreased the shifting of an automatic transmission may become erratic other symptoms may also be present

Read more at:

Forum VE Holden Commodore 2006 2013


Oct 18, 2016 | Holden Cars & Trucks

1 Answer

I Have a 2007 Suzuki Forenza with a winding in the Transmission the code PO783

get it fixed, are you going to diagnose and repair and A/T?
that car is a 1/2 GM/ Daewoo car. a sad mix of parts. (sell it? i would )
the service book is here. $4
This is called an FSM.

783 (p07xx means tranny issues)

quote FSM:
Trouble Code: P0783 (2.0L L4 VIN - Auto)
3 - 4 Shift Malfunction Print this code dataprint_icon_codes.gif comments in (xxxx)
Trouble Code Conditions: (preconditions before test)
Transaxle oil temperature is greater than -10 °C (14 °F). Selector lever is not N (Neutral), P (Park) position. (warm , in gear)
System voltage is greater than 9 V.(car battery not dead)
No input speed error DTCs P0715, P0716 and P0717.
Speed sensors not dead.
Output speed is greater than 256 rpm. (tail shaft rpm (speed)
Input speed is greater than 400 rpm. (engine rpm after clutch)
3 - 4 gear shift is active. (the TCM commands shifts to 4th)
Possible Causes:
  • Circuit to solenoids bad.
  • ECM, bad.
  • TCM bad or inputs wrong.
  • end quote.
this means, in pure physics.:
the transmission slip's
what that test failure means it bar stool talk is this.
I shafted to 4th but the MPH is too slow, so the transmission
is not shifting to 4th , or it slips

any mech would drive the car first. (did he?)
and flog it up hills (in Kansas? omg)
TO SEE, if it slips in 4th or fails to shift at all.

  1. fresh ATF? and filter? serviced and levels good on A/T
  2. is the 4th gear command to the shift solenoid good.?(logic)
  3. if trans slips? (fails FSM book stall tests) bad tranny.
  4. if the trans fails stall , check line pressure per FSM.
like that, and more, lots to say on A/T
If in uSA find a real , shop, with ASE techs. and win.

Aug 21, 2014 | Suzuki Cars & Trucks

1 Answer

I have a 1996 sunfire that all of the sudden wont accelerate , rpm's stay down , check engine light on and has for some time smelled like gas after running

as long as light is on, go to auto-zone etc they will scan for free. no sense in guessing, the OBD-2 scanner will give you a po code, so you know what area to start and fix it.

May 18, 2011 | Pontiac Sunfire Cars & Trucks

1 Answer

My 1999 monte carlo z34 has not been shifting into overdrive. My uncle who is a mechanic said that whoever changed the tranny fluid last put in the wrong kind. I need dextron 3. Would this cause my car not...

Your problem looks like there is no 4th gear
One thing you could do is :

1. Drive your car at a steady speed and cruising while your right foot is on the gas pedal with your left foot just touch a little bit the brake pedal just to release the brake switch and look the RPM should drop of 300 to 500 rpm in 3th gear. If so, you have the TCC (Torque Converter Clutch) applied next.
2. Retrieve the engine code with a scanner to see if there is any faulty transmission or engine code.
3. If you have code register than you have to solve the code first.
4. After the fix is done erase code so the PCM (Powertrain Control Module)will reset to normal.
5. Test drive to see if your problem is solved.
P.S.: Transmission fluid is very important. Do a transmission flush if you doubt.

Hope it helps.

Feb 21, 2018 | 2000 Pontiac Grand Prix

2 Answers

PO 171 and PO174 codes but different problem

transmision shifts are based on engine load imputs a 171 and 174 refer to a lean condition therefor the shift is being based on an assumed cold engine so yes it may be related

Apr 23, 2009 | 2003 Ford Explorer Sport

1 Answer


Try checking it out at the shop but i think that you might find that your going to have to replace the clutch.

Mar 24, 2009 | 1996 Honda Accord

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