What is a typical number for the gear ratio of driveshaft to axle for high gear? For example, something like 2 revolutions of driveshaft for every 1 revolution of wheel(assuming RWD) axle?
Is 1:1 a typical number? Can it go any lower, something like less than 1 to 1?
How about low gear? What is a typical number?
thanks.
2007-08-21 13:35:35 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Other - Cars & Transportation
sorry, I am taking physics in hs and was reading on gear ratio and thought about this. I bet my wording must be pretty bad and I am not really an expert on cards.
2007-08-21 13:47:19 · update #1
Well, there are two things to be considered. There is the axle ratio, and the ratios of the different gears in the transmission.
The axle ratios of most RWD vehicles are between about 4.10:1 and 2.75:1
Remember, that each gear from first gear to high gear is a different ratio. Cars with overdrive transmissions, have transmission gear ratios (for the OD gear only) which are lower than 1:1, more like .86:1 or .75:1
These numbers are multiplied, because the ratio of the transmissions is engine RPM:driveshaft RPM, and the axle ratio is driveshaft RPM:Wheel RPM.
What this mean is that a car with a .75:1 OD, and a 4.00:1 gear ratio would have a final drive ratio of 3.00:1 (75% of 4.00) or 3 revolutions of engine for 1 revolution of tire.
I hope I didn't confuse you, but you asked the question in high gear, and that would be the transmission, which has no effect on the axle ratio. The axle ratio stays the same unless it is physically replaced with a different gear set.
Good luck!
2007-08-21 13:52:58 · answer #1 · answered by Doug K 5 · 0⤊ 0⤋
Common Gear Ratios
2016-12-14 15:26:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
It doesn't matter what gear you are in. The dirveshaft will spin the number of revolutions that your rear end is geared for. For example, if your rear end ratio is 3.73 to 1, the driveshaft will spin almost 3 and 3/4 turns everytime your axle makes one revolution.
The overdrive and high gear is handled thru the transmission.
2007-08-21 13:45:51 · answer #3 · answered by Fordman 7 · 0⤊ 0⤋
Your question is asked in a way that is confusing
The gear reduction in a transmission is around 3 1/2 to 1 for first gear, 2 1/2 to 1 for second gear 1 to 1 in drive, and 1 to 1.2 in over drive
The gear reduction the the axle or rear end of the car varies with the size of the tires it came with from the factory and its intended purpose. It can vary from 2.30 (or numerically less) to 1 all the way up to 4.70 (or numerically higher) to 1
2007-08-21 13:45:21 · answer #4 · answered by jim 5 · 0⤊ 0⤋
My mustang's driveshaft turns 3.27 times to turn the rear axle once; 3.27:1 axle ratio. This number doesn't change if you're in high gear or any other. That's what the transmission is for.
Here are my 5 transmission ratios:
1) 2.95:1
2) 1.99:1
3) 1.31:1
4) 1.00:1
5) 0.68:1
2007-08-21 13:45:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Here is what you fail to realise Most modern transmissions have over drive like 1.25 revs to one of the engine. And rear end gear is about 3 turns to 4 turns of the drive shaft to one of the tire. When calculating horsepower the DYNO you use the one to one gear manual it is fourth gear automatics it some times is 3rd or fourth.
2007-08-21 13:44:07 · answer #6 · answered by John Paul 7 · 0⤊ 0⤋
I understand what you mean, yes the trans highest gear usually is 1 to 1..... in the rear it can be any gearing, like my Durango was 3.92 and my Explorer is 3.55 gears....
2007-08-21 14:27:44 · answer #7 · answered by Stampy Skunk 6 · 0⤊ 0⤋
very confusing point. look into on yahoo and bing. this will help!
2015-04-26 17:06:33 · answer #8 · answered by John 2 · 0⤊ 0⤋