Ford Focus 07. At highway speeds, 70 to 80 mph, I'm getting anywhere from 3600-4,000 RPM. Is this too high, or normal?
Ford Focus 07. At highway speeds, 70 to 80 mph, I'm getting anywhere from 3600-4,000 RPM. Is this too high, or normal? - 1
Yea, that seems awful fast… Sure you're in OD?
Let's do some math.
If you look here
https://www.caranddriver.com/comparisons/2009-toyota-corolla-vs-ford-focus-vw-rabbit-subaru-impreza-and-four-more-economy-cars-comparison-tests
Specifically at the powertrain chart. You can see that on a 5 speed Focus. In top gear. You get 23.6 MPH for every 1000 RPM. 5th gear has a .77 to 1 ratio. With the axle ratio being a 3.82 So at 75 MPH. You'll be turning about 3100-3200 RPM.
If you have the automatic then the top gear is a taller .73 to 1 ratio and the axle ratio is 3.73. This would mean that in 4th gear (OD) at 75 MPH you would turning about 2750 MPH. However if you're in 3rd gear with a 1:1 ratio then you would be turning around 3600-3700 RPM at 75 MPH. This is assuming stock sized tires of course.
It does sound like overdrive is not engaging, Assuming you have the automatic, there's a button on the gear shift lever that locks out overdrive. Make sure overdrive is not locked out. If overdrive is locked out, you'll see a light on the dash that says "OD Off" if you see that, push the button the gear shifter. If the light is out, the transmission should shift into overdrive and you'll see more reasonable highway RPMs.
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