Questions tagged [drivetrain]

The group of components in a motor vehicle that generate power and deliver it to the road surface. These components can include the engine, transmission or transaxle, transfer case (if so equipped), drive line, and axles.

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33 votes
3 answers
15k views

Difference between FWD/RWD/4WD/Part-Time 4WD/AWD?

I'm curious as to what are the particular difference between the various drive systems available in modern vehicles. FWD and RWD are pretty straightforward - Front Wheel Drive cars put the power to ...
Iszi's user avatar
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24 votes
16 answers
109k views

What is the purpose of plastic engine covers?

I have a 2010 Toyota Corolla. What is the purpose of the large plastic cover that stretches over my valve cover? Does it have a particular function? Are they just for looks? Or are they designed by ...
David Walz's user avatar
17 votes
2 answers
7k views

how to optimize fuel consumption by changing the rear differential ratio?

Is it possible to improve the fuel consumption (decrease it) in my van by changing the rear differential ratio? I would like to optimize it for low-speed driving about 40 km/h (25 mph). Is it true ...
ria's user avatar
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7 votes
2 answers
17k views

does a car normally continue moving at a constant speed when in gear and the foot is taken off the accelerator pedal?

I remember when driving a passenger car, when I took my foot off the accelerator pedal completely, but remained in gear, the car would normally continue to move at some low speed, different for each ...
ria's user avatar
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5 votes
1 answer
3k views

New engine and clutch, have weird vibration @3K RPM

I just replaced (well, had someone else replace) the engine in my 06 Solstice. The engine runs great for the most part (will open a separate question about that), but there is a weird vibration at ...
3Dave's user avatar
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8 votes
1 answer
14k views

Grinding noise while driving

On my Opel/Holden Astra H (150KKm, front wheel drive, m32 6-speed manual transmission) I hear a slight grinding noise from the right-front, starting at about 40 km/h. The noise is synchronous to the ...
Martin's user avatar
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