Question about 2003 Chevrolet Suburban

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Transmission all of a sudden wont shift and cannot go more than 45 MPH

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I have seen that happen to those vehicles before and have I found that, believe it or not, the fuel filter was plugged up.

Posted on May 14, 2010

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Posted on Jan 02, 2017

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1 Answer

Won't go above 50 mph, and transmission has trouble shifting


probably a faulty transmission control module BUT run the fault codes to find out exactly

Mar 03, 2016 | Cars & Trucks

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Transmission shifts hard


You don't give me much information to work with. However, 1st, look at the engine mounts. You may have a broken mount. This will make it feel like the transmission is shifting hard. Other than that, there is only a few things that will cause this. The speed sensor tells the computer when to shift the shift solenoids. It may not be "seeing" a quality signal. If this is the case, the speedometer will be bouncing too. Last idea is that it is skipping a gear. Starts in 1st, should go to 2nd at about 10 MPH. 3rd at 25 to 30 MPH. And, if you have a Overdrive transmission, it should go into overdrive at around 45 to 55 MPH. If it is skipping 2nd, it will engage 3rd at a high engine speed, and will feel like a sudden slam into gear. If this is true, your transmission needs some work. Hope this all helps. Good Luck.

Jun 19, 2014 | 2002 Pontiac Sunfire

1 Answer

Wont shift gears


You may need a re flash of the programming in the transmission control module. Only the dealer can do this.

Mar 17, 2014 | 2007 Nissan Murano SL

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Lexus ES300 Shakes/Vibrates At 45 MPH


Major transmission problem. That's what the flashing Check Engine light means.

If the Check Engine light is on all the time, it means there is a "fault code" stored in the computer. Take it to an auto parts store (like Auto Zone) and ask them to read the codes to see what it says. They should do it for free. If they won't, go to another auto parts store.

Jan 05, 2014 | Lexus Cars & Trucks

1 Answer

2003 toyota echo when shifting above 45 mph makes a loud high rpm noise especially on the highway


If it is not going into overdrive or lockup it could be the fluid or an electrical problem. Some of the shifting is controlled by solenoids now.
You may have to get a transmission shop to evaluate it for you.

Sep 29, 2012 | 2003 Toyota ECHO

1 Answer

Transmission wont shift proparly


Sounds like your kickdown cable for the transmission is not adjusted properly. If this is a GM product,you will need to push in the silver looking button on the cable where it hooks to the throttle linkage,and pull the black plastic piece out (towards front) just a bit.

Aug 30, 2012 | Cars & Trucks

1 Answer

97 aurora shifts fine in 1st thru 3rd and under 45 mph, then over that speed will go into OD but slips over 45 mph, any ideas??


If the AFT fluid level is ok then the only thing that would cause this is that the transmission has failed, the clutches are burnt up or worn out, the transmission will need to be replaced or rebuilt.

Feb 10, 2012 | 1997 Oldsmobile Aurora

2 Answers

MY TRANS WONT SHIFT INTO THIRD GEAR UNTIL IM DOING 45 MPH IT SHIFTS FINE IN FIRST AND SECOND GEAR WHEN IT IS IN SECOND GEAR AND WONT SHIFT TO THIRD I CAN PUT IT IN N AND BACK TO OVERDRIVE THEN IT SHIFTS.


Most likely your shift cable (from the selector to the transmission) is worn, maybe needs lubrication. Mine had a similiar problem, but had to shift it into neutral and back up to get it in reverse. A new shift cable solved the problem.

Jul 27, 2009 | Lincoln Town Car Cars & Trucks

1 Answer

Transmission slipping or stalling around 45 mph and down shifts


if fluid isn't burned, shifts aren't slipping or flairing and you did not find a large amount of debris in the pan, chances are that the electronic shift control is malfunctioning. Have someone check it out.

May 28, 2009 | 2004 Jeep Grand Cherokee

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