# What should the gear ratio be at 65 mph?

## What should the gear ratio be at 65 mph?

Number Ring Gear and Pinion Ratio (3.08, 3.73, 4.10, 4.56, etc.) Tire Height (31, 32, 33, 35 etc.) MPH Transmission Final Gear Ratio (2.54, 1.43, 1.00, etc.) Calculated Results Engine RPM “Ideal” 65MPH Cruising Speed RPMs Based on Tire Size (estimated) 27″ 28″ 29″ 30″ 31″ 32″ 33″ 34″ 35″ 36″ 37″ 38″ 40″ 42″ 44″ 1,752 1,690 1,631 1,577 1,526 1,478

## Why does my transmission rpm keep climbing up?

It seems that the gears are slipping and causing the rpm’s to climb up. Check the transmission fluid and make sure that it’s full and red in color. Very dark red or black transmission fluid is an indication that the transmission is burning the fluid for getting too hot from either overloading or slipping gears.

When do I put my truck in drive, the RPMs go up?

When I put my truck in drive and step on the gas the RPM’s go up to 3,000 but my MPH will stay at 10-15 When I let go of the gas a little bit I can feel the truck kind of pull and the RPM’s will g… Stack Exchange Network

### Why does my transmission not shift into 3rd or 4th?

P0121 is a throttle position sensor and the P0171 ha to do with the engine running too lean Any luck getting this addressed since your last post, Ozzie? Not yet, I think I will try replacing the solenoids in the transmission first. If that doesn’t work then I guess its time to have it rebuilt.

Number Ring Gear and Pinion Ratio (3.08, 3.73, 4.10, 4.56, etc.) Tire Height (31, 32, 33, 35 etc.) MPH Transmission Final Gear Ratio (2.54, 1.43, 1.00, etc.) Calculated Results Engine RPM “Ideal” 65MPH Cruising Speed RPMs Based on Tire Size (estimated) 27″ 28″ 29″ 30″ 31″ 32″ 33″ 34″ 35″ 36″ 37″ 38″ 40″ 42″ 44″ 1,752 1,690 1,631 1,577 1,526 1,478

### Which is the best overdrive transmission on the market?

The 4L60-E is an automatic shift, four-speed overdrive, longitudinally positioned transmission. It has been considered to be the best rendition of the finest overdrive automatic transmission ever produced.

It seems that the gears are slipping and causing the rpm’s to climb up. Check the transmission fluid and make sure that it’s full and red in color. Very dark red or black transmission fluid is an indication that the transmission is burning the fluid for getting too hot from either overloading or slipping gears.

Which is GM rear wheel drive transmission is the best?

It has been considered to be the best rendition of the finest overdrive automatic transmission ever produced. The 4L60-E is found in nearly every GM rear-wheel-drive application, including the C/K Truck, Sonoma, Jimmy, Tahoe, Yukon, Astro, Safari, Suburban, Bravada, Firebird, Camaro and Corvette

#### Why does a 3.73 gear burn more fuel?

For example with a 3.41 gear you maybe be at 1800 rpm in 6th gear on the highway at 80 miles per hour but with a 3.73 gear you would be at say 2100 rpm at the same speed 80 miles per hour in 6th gear. So you will be burning more fuel at the same highway speed because you are at a higher rpm.

#### Is it OK to drive in 4th gear?

If fourth is an overdrive gear (less than 1:1, say 0.7:1), it is fine to drive in 3rd and even recommended in some situations to improve driving experience and vehicle performance (examples – stop and go traffic, towing).

Which is better for fuel economy 3.23s or 2.73s?

Switching from a set of 3.23s to 2.73s will lower your auto’s normal operating rpm range during driving which will translate to higher fuel economy for you the driver. The difference can be anywhere from a few mpg to several mpgs depending on how much of a smaller ratio you select.

For example with a 3.41 gear you maybe be at 1800 rpm in 6th gear on the highway at 80 miles per hour but with a 3.73 gear you would be at say 2100 rpm at the same speed 80 miles per hour in 6th gear. So you will be burning more fuel at the same highway speed because you are at a higher rpm.

## What’s the speed limit on a 1970 4-4-2?

The 3.23’s allows a kick down to second at 50 MPH. This thing is a monster between 45 MPH and 70 MPH. (ex-cop car). 1970 4-4-2 with the standard 455 (mildly modified) and 3.23 diff. At 60 MPH, I could punch it and instantly pass anything I ever met.

Switching from a set of 3.23s to 2.73s will lower your auto’s normal operating rpm range during driving which will translate to higher fuel economy for you the driver. The difference can be anywhere from a few mpg to several mpgs depending on how much of a smaller ratio you select.

## Which is better lower top speed or lower pinion gear?

Well the bottom line is that the smaller the pinion gear or higher the numerical ratio i.e. 4.10 to 1 (a typically high ratio) means that the quicker your acceleration will be and the lower your car’s top speed that can be reached will be as well.

Can a faulty PCM cause low fuel mileage?

Since the fuel pressure regulator is given specific air/fuel mixture directions from the PCM, it should always maintain the proper mixture. A faulty fuel pressure regulator can also be to blame for a sudden decrease in fuel mileage. These symptoms can also occur with a plugged fuel filter, failing fuel pump, or faulty PCM.

### What should my gear ratio be for a new car?

One of the biggest things to keep in mind when choosing a new gear set is what the purpose of your vehicle is. If it’s a daily driver, chances are you’ll want to keep your gear ratio at 3.23 or below for optimal performance and lower cruising RPMs.

### How does the gear ratio rpm calculator work?

This calculator does not take into consideration any drive train loss, road and weather conditions or driver skills. The calculated results are displayed; the higher the engine RPM, the greater the potential speed at the cost of fuel, heat, friction and engine longevity.

How to convert rpm’s to speed in mph?

If you look at the specs of your skill saw, among other things, it will state the no-load speed given in revolutions per minute the saw can operate at. This is the speed your saw blade will run at when you pull the trigger and of course the instance you cut into a material the RPM’s will be reduced.

#### How to convert revolutions per minute to miles per hour?

Converting revolutions per minute to a speed of miles per hour. Like you need to know this we will make this calculation about a skill saw. If you look at the specs of your skill saw, among other things, it will state the no-load speed given in revolutions per minute the saw can operate at.