Question about 2001 Pontiac Bonneville

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2001 Pontiac Bonneville SE; Transmission: will not shift out of 2nd gear. Checked the Catalytic Converter - OK. Checked the pan and flushed the tranny. Is there a solenoid issue?

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Internal tranny problem what you did will not solve problem find a tranny speciallist

Posted on Jul 01, 2009

  • Dave Dahlberg
    Dave Dahlberg Oct 16, 2013

    The catalytic converter has NOTHING to do with the transmission. Its the Shift Solenoid

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What causes my 2003 pontiac bonneville to **** when it shifts from 1st gear to 2nd gear. and when it gets warmed up after 20 minutes to 30 minutes driving it acts as if it do not want shift gear or not...


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2002 pontiac bonneville transmission jerks or bumps when shifting, however not all the time. Can go one or two days without doing it or once it starts if you stop and turn off the engine and start the car...


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Here is what fixed my problem. I replaced the Mass Air Flow Sensor. It cost about $150.00. From what I was able to find out the mass air flow sensor is tied into the PCM module that tells the car when to shift.

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I have a 1997 Pontiac Bonneville Se. Lately, the transmission has been really jerky as it shifts. does it most when it gets hot, didnt know if its the whole tranny or torque converter, fluid is still in...


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Hard Shift to 2nd Gear/next gear


Your going to have to get your car scaned for codes. Auto Zone can scan it for you for free and tell your what you'll need to fix it.
It sound's like your VSS Sensor (speed sensor) is not working and your ECM is not getting the signal from the transmission to know when to shift the gears.
Becareful not to burn out the transmission till you get it fixed. The sensor it self is not that expansive and to replace it is easy and takes about 30 min to do.
If you get a P0720 or a P0722 code, then it's your speed sensor. It's an esy fix and Auto Zone can give you instrction on how to change it. 
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Hyundai Santa Fe 2005 won't shift into first gear


Most likely the o-ring seal between the torque converter and the transmission is going bad. Get that transmission rebuilt pronto before serious damage is done! But first, have a mechanic drop the transmission pan and look for signs of a very thin silvery film coating the inside of the pan. If found, then the transmission definitely will have to be rebuilt, and the torque converter will also have to be replaced since embedded metallic particles in the old torque converter will eventually come loose, due to wear of the clutch plates within the torque converter, and eat up the rebuilt transmission. Now, here is the deal once the transmission has been rebuilt:

Change the transmission fluid and filter once a year -- no matter what! If you do this, then you should never have any more problems with the transmission.

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