Transmission Issue? - Alfa Romeo Bulletin Board & Forums

 
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post #1 of 3 (permalink) Old 03-09-2017, 05:51 PM Thread Starter
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Transmission Issue?

I have a regular Giulia Q4. Sometimes when I have made a stop for about an hour and leave with the engine temp gauge at about two bars, I will stop at the exit with the brake applied and wait to go. The engine will go up to about 1200 rpm (like a fast idle) but there is no push. It almost feels as if it's out of gear. When I release the brake and exit the idle speed goes down to regular. This only happens when the engine is about half warm. When I leave the garage in the morning when the engine is dead cold this doesn't happen. I have absolutely no problems with this transmission otherwise.The shift points and power transfer are excellent (unlike every Fiat automatic I've ever owned). The dealer has no flash updates for this car at this time.
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post #2 of 3 (permalink) Old 03-10-2017, 09:35 AM
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Originally Posted by alphawolfe View Post
I have a regular Giulia Q4. Sometimes when I have made a stop for about an hour and leave with the engine temp gauge at about two bars, I will stop at the exit with the brake applied and wait to go. The engine will go up to about 1200 rpm (like a fast idle) but there is no push. It almost feels as if it's out of gear. When I release the brake and exit the idle speed goes down to regular. This only happens when the engine is about half warm. When I leave the garage in the morning when the engine is dead cold this doesn't happen. I have absolutely no problems with this transmission otherwise.The shift points and power transfer are excellent (unlike every Fiat automatic I've ever owned). The dealer has no flash updates for this car at this time.
It seems you've shown the issue to your dealer.
Did they check the fluid level of the transmission?
On older cars, a vacuum leak (even the tiniest leak) would cause all kinds off problems. I don't know if vacuum has any bearing on this new transmission.

I suppose the more obvious suggestion would be, "Don't do that until it's fully warmed."

I think fluid pressure has a big influence here. When it's cold, the oil (hydraulic fluid in the transmission is a type of oil) is thick and there is more pressure because it's harder to move the oil. As it warms, the fluid flows easier and the pressure drops. If it seems fine when both cold and hot, then perhaps it's a glitch on the software designers part. It should still be looked into.

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2015 Alfa Romeo 4C
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post #3 of 3 (permalink) Old 03-10-2017, 05:39 PM Thread Starter
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The more I experience it and think about it I feel that it's programed to do what it's doing. It's very consistent and happens every time under the same conditions. It happens in reverse or drive. When you take your foot off the brake the transmission engages and moves the car.
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