what is difference between 4-speed automatic 5-speed automatic 6-speed automatic car?

Question

thinking of buying a new suv. Any one can say, meaning of 4,5,6 speed automatic transmission to end user?

Answer 1

More gears means somewhat smoother shifting, better gas mileage and acceleration. But the rule of thumb is: a good 4-speed is always better than a bad 6-speed.

Answer 2

That is exactly what it means. Some transmissions have 4 forward speeds (gears) and some have 5 and even 6 speeds or gears. The more gears the better the car will operate because the engine will stay more in its power zone and not have to raise and lower rpms that much. Good luck

Answer 3

I am reminded of a line from a movie- "The more they over load the plumbing the easier it is to stop it up" There is only so much that can be done before the point is reached that the newest gizmo's will prove to be a night mare. What you suggest is nice as long as it works, but when it breaks down the repair bill will be very large. So I do not think it is a good idea. Leave them in the EVO's which are known failure wizards and let the Subaru be what it always has been (a good reliable car that is cheap to own and maintain).

Answer 4

Theoretically, the larger the number of gears, the smoother the shifts between gears. However, in my experience, that hasn't been true. One car's 4-speed can easily be smoother than another's 5-speed or 6-speed.

I suggest you search on the Internet for "XXX forum" where XXX is the brand/model of car you're thinking of buying. You'll find forums or discussion groups of owners of that vehicle that can tell you how the transmission for that vehicle performs.

Answer 5

It is the number of forward gears you have. The more the gears, the easier it is to keep the engine running at its most fuel efficient speed, the greater the MPG.

Answer 6

basically the number of forward gears. one thing though, the more forward gears, the heavier the transmission is though as the manufacturers add planetary gear sets to the trans, and that adds weight, rotating mass, and length.

Answer 7

the ratio of gears from engine to driveshaft and differential (back wheels)

ex 1st gear 4:1
ex 2nd gear 3:1
ex 3rd gear 2:1
ex 4th gear 1:1 -lets say !

differential ratio at rear axle
lets say for example 3:1

so from 1st gear to back wheel the ratio will be 12:1
and
so from 2nd gear to back wheel the ratio will be 9:1
and
so from 3rd gear to back wheel the ratio will be 6:1
and
so from 4th gear to back wheel the ratio will be 3:1

hope that helps !