car IDLES differently in D, than it does in 1, 2, or OD?
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Joined: Sep 2001
Posts: 121
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From: Sissonville, WV
car IDLES differently in D, than it does in 1, 2, or OD?
I noticed that if I have the car in gear with my foot on the brake, it idles DIFFERENTLY in Drive than it does in the other gears?! It's like the car sounds/feels SLIGHTY different, maybe like a 'higher pitched' idle (the RPMs stay EXACTLY the same though). 1st is normal, 2nd is normal, 3rd is a little different, 4th is normal?! Does this make sense?
-Thanks
-Thanks
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Joined: Feb 2000
Posts: 1,416
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From: Johnstown, Ohio
Car: 84 Z28
Engine: 355 (fastburn heads, LT4 HOT cam)
Transmission: 700R4
Axle/Gears: 9-bolt, 3.27
Sorry, but it does NOT make sense to me! The input shaft turns the same speed (0 RPM's) if you're stopped, and idling.
Supreme Member
Joined: Feb 2000
Posts: 1,416
Likes: 0
From: Johnstown, Ohio
Car: 84 Z28
Engine: 355 (fastburn heads, LT4 HOT cam)
Transmission: 700R4
Axle/Gears: 9-bolt, 3.27
I've thought about this on ea little bit, and still haven't come up with anything definite. The only thing I can come up with is it may idle slightly lower (Although I odn't really think it would be noticable) in second, first, and reverse due to the fact that the line pressure is a little bit higher in those gear, therefore creating a SLIGHTLY increased load on the engine. Either you have a REALLY good ear/feel, or your engine is really sensitive to load at idle.
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