Question about 2000 Oldsmobile Silhouette

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When accelerating from a stop, car lurches when shifting gears

2000- Olds Shilouette- This happened out of the blue. When accellerating from a stop, as it shifts through the gears, it lurches, or jolts though each gear.

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  • ourdomino Feb 11, 2009

    125,000 miles. Not did not check trans. fluid yet. Will do first thing.

    This car has been a lemon since we drove off the lot brand new.

  • miforty Feb 19, 2009

    I have the identical problem, mine also has been a lemon since day 1- had to have the transmission replaced at23,000 miles- and it ran fine for about 6 months- one thing after an another since. Worst vehicle I have ever owned. Will never go back to GM. I should have unloaded it when it was still new, now I know.Also, right after the 60000 mile mark, I had to replace the braking system- apparently they were never adjusted properly during installation. Way to go- United Autoworkers!

  • Mark Egan May 11, 2010

    Have you checked the transmission fluid level?

    How many miles on the vehicle?

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On a lot of vehicles there is a transmission speed sensor that receives data that tells it how fast the car is going and shifts accordingly. If this sensor is bad the transmission can't function properly. I would have this checked, they are not that terribly expensive, and not that hard to change on most vehicles. Hope this helps.

Posted on Mar 02, 2009

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DEFINITE LURCH IN 1ST AND 2ND GEAR,


This may apply. ...............................

Carry out the adaptation drive cycle road test:

Note: This process must be carried out in normal mode (not sports mode). On a flat road, the transmission fluid temperature must be above 60° C (140° f) and below 100° C (212° f) (vehicle at normal operating temperature will ensure that the transmission fluid temperature is above 60° C (140° f)).
9. Accelerate from rest with light throttle (do not exceed the upper rev limit in appendix 1). 1-2, 2-3, 3-4 shifts must occur with engine speed between the following limits:.
Note: Do not move the accelerator pedal during shifts.

• 3.0L VIN ALL 1800 - 2000 rpm
• 4.2L N/A Prior VIN M96321 1450 - 1600 rpm
• 4.2L N/A From VIN M963221550 - 1700 rpm

10. Continue to accelerate gently to 50 mph (80 km/h) so that transmission shifts into 5th gear.
11. Go into overrun and let the transmission shift down into 4th gear without braking.
12. Brake gently to a standstill and hold footbrake on for at least 15 seconds.
13. This process should be carried out at least five times.

Page 2 of 3 Bulletin Number S307-17
________________________________________________________________________________

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I have a s40 1.9d / 2000 plate,
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Could my transmission be slipping


Quick check is to accellerate from a stop with steady even pressure on the gas. Watch the tach. It should have a good shift at approximately 2000 rpm and the tach should not jump higher during the actual shift (called flairing) This should be the same for each shift. Converter lockup (4th gear shift) should cause tach to drop about 500rpm and should happen at about 45mph. Then repeat the same process using a more agressive acceleration.
Shift points in rpms may be a bit higher but each shift should not flair. To check lockup, while driving at about 50mph, lightly touch brake pedal and you should feel ti disengage for a moment. Since you have an opportunity to return it, It would not be a bad idea to get a hands on evaluation from another shop you trust...I can't see it from here and a live person is better equipped to give an informed opinion.

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