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Rough 1st gear

 
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Old 09-17-2016, 11:57 AM
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Rough 1st gear

Hi All,

I have a base 2012 Vantage. Had the car since March and love it. One thing I am noticing more of is when I drive slow in first gear (less than 7/6 mph), the car sometimes get very jerky with my foot off the clutch. If I don't press the clutch at that time and just give more gas, the car continues to jerk and gets more violent with more gas. But if I press the clutch, the jerking goes away. The reason I have to drive slow in first gear is because I live in a condo and park it in a 4 story garage. With speed bumps and turn, I can't really drive more than 10 mph.

This doesn't happen on normal road driving as I am able to give more gas. I drove my buddy's 2013 Vantage S and his 1st gear is much smoother than mine and didn't experience the jerking driving it in a parking garage.

I asked my mechanic about it and he said it's probably the gearing of the Vantage and the S is probably geared different.

Do you guys have any thoughts?
 
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Old 09-17-2016, 12:08 PM
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All to common with the Sport Shift gear boxes unfortunate and surprising that it is happening with your manual though.
 
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Old 09-17-2016, 04:28 PM
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These engines don't have a lot of torque. What torque they do have in not available at low rpm's. I have to push in the clutch at anything below 1500 rpm to keep the engine from jerking. Unfortunately with a sporshift you don't have that option.
 
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Old 09-18-2016, 03:35 AM
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Common feature of a spring hub clutch combined with a heavy flywheel that our vintages have. The ECU idle control anti-stall feature is just trying to prevent the motor from stalling. Both my 07s did that.
 
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Old 09-18-2016, 05:05 PM
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Unfortunately you have to slip a clutch a bit before letting out if you want to get moving in 1st gear at a very slow speed.

1st gear is very sensitive to heavy inputs, between engine braking and you giving it gas, the car can get very rough. Some times I end up going into 2nd at those speeds.
 
 
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