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Old 10-13-2008, 05:52 PM
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Best gear ratio fr highway driving/

Hey guys, I have only had the 428 'stang out for one or two city drives. The 3.50 gear ratio is not goint to work for me for highway driving.

I view the car as more of a summer canyon carver/cruiser than blasting between stoplights.

Right now I have a wide ratio toploader, which gives a decent 1st gear.

I am thinking 3.0 or 2.7 ratio.
Speeds I am expecting are cruising at 70 mph. 250-350 miles at times (frequent stops)

There is a possibility that I could goto a TKO 600 in the future which gives an overdrive. I like the toploader. It's not that precise, but it's still fun

So chime in, those of you who have done some highway driving.

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Old 10-13-2008, 05:55 PM
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Here is one of those rpm calculators.

When I had a 4 speed in my camaro and was doing some highway miles.I had a 3.08.I liked it.
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Old 10-13-2008, 07:43 PM
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3.00 - 3.08

I use to have a 72 Camaro with a 350/350 and 3.08 posi. I changed the gear set to a 3.73 to lower my e.t. at the dragstrip; No change what so ever. Eventually the engine power went up and the lower gear ratio helped move the car very effectively. The power went up some more, now traction is a big problem. I guess my point is: think about what other modifications you plan to make over time. If you think the current set-up is close to your ultimate goal, then look for a gear set that gets you in a comfortable RPM range at the speed you plan to drive. Do you need to power out of corners? What RPM will your engine be running in 2nd or 3rd gear coming out of a typical corner? Do you know at what RPM your engine is making most of it's power?

I see some people changing to numerically lower gears recently to save on fuel costs. Long story short - if you have a gass guzzler, you'll end up with a gas guzzler with highway gears. The more sedate (drivable) cars seem to be more economical with "highway" gears.

A few things I remember: the lower numerically the gear, the less problems I had with breakage. The numerically lower gears lugged the engine down more on take off, but if I ever got the tires spinning- I could lay down rubber for a looong way.
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Old 10-13-2008, 07:58 PM

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I don't see where the 3.50:1 rear gear is so bad, not buy the numbers anyway, what you need is a Overdrive unit you can switch on or off when needed. I have used these before with excellent results, they are very short and bolt-up right behind the transmission. The ratio's are plentiful and the operation is silly smooth, and don't worry about the torque, they hold plenty of power.
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Old 10-13-2008, 08:01 PM
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I have 3.08s in my elCamino with a .67 overdrive 75 mph is 1900 rpm
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