truck rear end ratios

The lower the number the better fuel economy and the higher the number the more towing power you have but fuel economy suffers. Metro Parts Market Phone 404-767-3378 - Fax 404-305-9437.

Secrets Of The Ford 9 Inch Rear Axle Mac S Motor City Garage Automotive Mechanic Ford Trucks Car Mechanic

Most lawyer prefer median verdict data.

. Hover over image to enlarge Calculate the Ring Pinion Teeth. The gear ratio most interesting to 4x4 truck owners is the ratio between the driveshaft and axles - the differential gear ratio or axle gear ratio. It is controlled by the number of teeth on the ring vs.

Our Tribe The Trucking Tribe is a group of people with a mission to do the hard work continue their education improve their health and well-being and achieve success in their. CAR TRUCK COVERS. 285 254 1122 x 70 78540 x.

Our mission is to provide innovative solutions for the challenges they face. For instance the 3421 ratio included on many Canyon V-6 and Sierra 1500 models offers a good all-around blend. Rear End Gear Ratio Discussion in Ask An Owner Operator started by Gazoo Aug 5 2007.

For instance if both the engine and transmission deliver up to 100 ftlbs. Ford Rear End Catalog. Now you can determine what fingal gear ratio you need for your average driving and speed.

My company bought those trucks used pretty cheap and then put Rigmasters on. These are 308 gears. A ratio of 456 means that as the axle turns.

1 High rangelow range. To find this number we divide the tire circumference by the drive ratio. It depends on what you find.

Our experts will help you find the correct ring and pinion set for your particular application. Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire. General Motors rear end differentials are referred to by the diameter of the ring gear ie.

Ad Tool Boxes Running Boards Bed Mats Mud Flaps Floor Mats Grill Guards More. This number is usually expressed as the number of rotations it takes over one. A typical pickup truck is sold with a standard axle ratio with optional increases.

First locate your current gear ratio and tire diameter and then find your approximate RPM at 65 MPH then reference your new tire diameter with your desired RPM to find the new gear ratio needed. Ford Rear End Ratio Chart Metro Auto Parts Market. Tire Size 254 x Aspect Ratio x 2 Wheel Diameter Tire Diameter in Inches Height EXAMPLE 285x70R15.

If you cant find a stamping or it is unreadable. Poll closed Aug 12 2007. For most trucks the driveshaft will turn between three and four times for one rotation of the axle which will be either 31 or 41.

This calculator will provide the speed of the vehicle based on transmission gear ratio engine RPM tire height and the ring gear and pinion gear ratio in the rear end axle differential housing. I know its been talked about before on the forum but I cant seem to find it using the search feature I think I might have even asked before but I cant remember. Each one affects the trucks towing capacity.

Step one in understanding axle ratios is to know what the numbers signify. Your Source for Classic Late Model Auto Parts. Ive never had a rear end apart mine was already rebuilt when I bought it.

The reasons why make perfect sense with a little bit of insight. You can typically find your RPO code on driver side door panel or glove box. This system is commonly used to describe 44 trucks.

Family Owned Facility Rebuilding Axles By Hand. The rear axle ratio determines if a truck is a capable tow beast or a comfortable highway cruiseror both. These are not the only ratios however.

According to Slesinski Class 8 linehaul trucks that spend most of their time at highway cruising speeds usually fall into axle ratio ranges usually between 226 through 3361 based on duty-cycle speed and type of transmission. This calculator assumes you know the vehicles transmission ratio. A 13 is better for mpg but lots of the high ratio trucks have OD transmissions even in 9 and 10 speeds.

Please refer to the Gear Ratio Calculator to determine your rear end axle. The high range ratio is used for highway speeds and the low range ratio is used for off-road speeds. Both combinations give roughly the same cruise rpms and final drive ratio and the best balance between efficiency and pulling power.

Four-wheel-drive trucks will have a matching ratio in the front axles differential. AUTO FASTENER KITS. A semi truck using a gear ratio of 226 would have good fuel economy and sufficient power for small tasks however it.

For example a 44 truck with a 355 rear axle ratio has a high range ratio of 3551 and a low range ratio of 11. These ratios are determined by the number of teeth on the pinions which impact the number of turns the axle makes. 75 inch 85 inch 105 inch.

Posted March 1 2012. Most fleets today opt for either a 355-58 rear end with a 73-74 OD top gear or 264 rear end with a direct drive top gear. Calculating the torque multiplication that your axle gears provide is quite easy.

55 mph1200 rpm 60 mph1280 rpm 65 mph1375 rpm. 62 mph1390 rpm 65 mph1450 rpm 70 mph1625 rpm. The proper rear-end gear ratio can be selected using the following simple formulas whether using a direct-drive 1to1 or overdrive usually 30 transmission.

For example the 2021 Ram 1500 is sold in three axle ratios 3211 3551 and 3921. The standard axle ratio found in a GMC truck or SUV has been carefully selected according to the vehicles specific body style and engine in order to provide the best all-around mix of performance towing strength and efficiency. Most class 8 semi trucks have a gear ratio of between 226 and 3361.

Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. Consider changing the axle ratios if the current trucks setup doesnt match its usage needs. No Problem Speak w Our Experienced Tech Today.

Axle ratios for heavy-haul applications operating on-highway range from 308 to 4101. The axle ratio is the number of revolutions the driveshaft has to make to produce a single rotation of the axle. Input your stock and new tires sizes.

308 gears which is perfect for an X-15 Cummins running in double. Then you can always count all the teeth on the pinion ring gears. FIGURING TIRE DIAMETER Height FORMULA.

Give us a call at 800-216-1632 to get started. Used Or Rebuilt Rear Axle. How axle ratio impacts towing capacity.

Truck gear ratios are usually classified in two ways. Axle Ratio RPM X Tire Size Speed MPH. For instance a 331 gets better fuel economy than a 373.

Of torque to the pinion gear and the gear ratio of the ring-and-pinion is say 4121 the output torque is 412 ftlbs. Next is a list of speeds vs RPM running low pro 225 tires. In the example to the left 37 12 3083333.

Our Mission The driving force of our success is understanding the evolving needs of todays owner-operators and drivers. Ad Are You Looking For A Quality Rebuild. I would like to change from the 411 my truck has to a 373 ratio.

Both the effective and new gear ratios are calculated. You can do this by multiplying by the gear ratio. But exact statistics are not available.

RPM - Rear End Ratio Chart. If we have a 411 axle ratio a 30-tooth over a 22-tooth QC ratio being 13636 then. The median jury award in rear-end truck accident cases is 93909 and.

Our truck accident lawyers estimate the average settlement value of a truck accident case involving a rear-end collision where a truck rear-ends another vehicle is around 150000 to 200000. Consider the available axle ratios when buying a vehicle. To find the gear ratio divide the big number by the little number.

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