8 5th gear is more of a 5th pulling gear versus an overdrive gear and used more in. 88:1 axle ratio is a typical "freeway flyer" gear ratio thats been added. Good Rear End Ratio for Street/Highway Driving around street/highway rear end gear and what would be the best route to go to achieve that (ie total rear end swap. This is an EZ to use and web based shift point calculator! This is sometimes gear shift drop calculator. Mine has the 4. 4:11 Gear Set Is Special Thick Kind For 3-Series Carrier The Experts at Eckler's know rear end differential parts need to be of the best quality for the longest service life and Eckler's has assembled the best quality ring and Pinion gear set to help you get down the road without worry for a long time. There were 129K miles on the truck it was removed from. 5 revolutions of the input shaft (where the clutch mounts on a gas car and the motor on an electric), the wheels will spin one complete rotation. Does anyone here have a rear end for. When working on a DANA unit, you can get the seals from Jaguar, bearings from a local bearing house, and the clutches, shims, and those silly little clutch retainers from any performance shop that has access to Dana rear end parts. Look at your RPO sheet (in your glove box) to see what gear ration you actually have: GT4 Rear axle, 3. 2”, then they are not far off, but the 8. 92's or the 66rfe with 4. The only difference was the rear axle ratio: 2. A 10 speed direct with a 2. If you plan to do a lot of highway driving in your pickup, the standard axle ratio will give you the best fuel economy. In order to determine the overall gear ratio in overdrive, the math calls for multiplying the rear gear ratio by the overdrive ratio. For example, if a guy has a big four wheeler and gets maybe 35-38" mud tires on it, he may have to drop to a 4. 33 rear end is 24 combined, 28 highway. GM uses a 3. When ever you change tire size from the original size to another there will be a direct effect on power and drivability. 73 ratio axle in 6th gear and 2073 rpm for 4. Ever wonder what your low-low-low gear ratio is, your "crawl ratio"? You'll need to do a little research by finding out the transfer case and transmission ratios first. Best axle gear ratio is a somewhat loaded question and does consider tire diameter. Therefore, the higher the ratio (4. At 70 MPH (most speed limits were around there in those days) the car would rev 2,800-3,000 (depending on tire diameter). 55 to one, 3. Rotate the tire one full revolution for posis and lockers and 2 full revolutions for open diffs. 08:1 ratio (G91) Highway driving gear ratio. 73s will before you hit the rev limit of the engine. Gear ratios and bad advice. In some 1982 Ford f100 trucks I know they have a 4. Ah! someday maybe betsy will be out and about also. My favorite car magazines of the day told me that when choosing a rear gear ratio, the engine's performance characteristics (Does it like to produce power at high rpm or is it built more for making a lot of low-end torque and mid-range power?), transmission type, converter stall speed if the trans is an automatic, vehicle weight, and tire. The other ratios are all within 0. If you care about the way that your truck drives when on the highway, and get annoyed that it won't stay in 6th gear during the slightest incline, you will want to seriously consider 4. 17:1, depending on the truck class, make and model, and rear-axle capacity. Towing a 16,000+ Lbs 5th Wheel Camper with Ram HD 3500 Dually turbo diesel: Does the Rear Axle Ratio Matter? (Ask TFLtruck). Once the vehicle was broken in, did several mileage runs at different constant speeds. The higher the gear ratio, the quicker your car will accelerate. In pickup trucks and truck-based SUVs, a transfer case is a large mechanism attached to the rear end of the transmission (see the photo). 73:1 axle/gear ratio means the drive shaft (or pinion gear at the end of the drive shaft) rotates 3. 2, mostly city driving, 6. I lean towards 3:54 gears at 455hp. I will recommend Arizona Differential Specialists to all of my friends and family. Stock T-5 (World Class) Transmission. 73 ratio axle in 6th gear and 2073 rpm for 4. Includes choice of differential type and gear ratio so it’s easy to build the perfect solution for your street rod, muscle car or truck. However, this is dependent on the rear axle ratio your truck is equipped with (several options are available, depending on which engine you get). I do 3000 RPM at 55 mph on the highway and it's not fun fighting for the slow lane when your engine rev's like that for extended periods of timeit calculates to a 4. 73 10 bolt rear axle for a 12 bolt 4. on tap for your typical highway driving, as well. What that means for gas mileage and fuel economy for truckers is best explained using an example: say you have a 9-speed transmission… and you’re in 4th gear at 1,500 RPM about to up-shift to 5th gear. The idea that changing rear end gearing significantly changes MPG is just not real. We offer a full line of new and remanufactured differentials, transmissions, and rear axle assemblies complete and ready to ship to you. With the low end torque curve of the Eco-Boost And the first gear ratio in the 6speed being a 4:17This guy doesn't need the 3. 23's, I think it's too steep for a BB and the highway. 73 gears in the rear end? ?. Seems like that would absolutely be terrible on the clutch and making driving around time not fun at all. 73 G2 Dana 44 Rear Ring Gear and Pinion Kit - 3. nice cruising gears for the highway. What would be a good rear end for general driving to go along with my TH350 trans? Or, am I barking up the wrong tree as the limitation is more with the 3 speed trans than with the diff? Thanks. 30 Rear Axle Affect miles per gallon on a late model F350 with the 7. A commonly overlooked component of a vehicle’s drivetrain that has a large effect on fuel economy is rear end gearing. We specialize in on-highway and off-highway trucks. I have 411 gears in my rear end, and right now I have a TH350 and a rebuilt 350 with roughly around 350 horsepower. O yeah I have heard that uping the gear ratio will give me more noticable torque and might decrease my gas mileage. The colors represent ideal RPM's at highway speeds (65). Tip: It's best to seek out the help of an experienced professional when changing the rearend gears. Includes choice of differential type and gear ratio so it’s easy to build the perfect solution for your street rod, muscle car or truck. Anyway, the gearing in the rear differential is 4. After searching and talking to the people I came upon the understanding that nothing seemed to match. Parts ship same day!. For street and strip applications, a popular choice ranges between 3. Subject: Gear Ratio??? IP: Logged Message: I have a 2003 Dodge Dakota Quad Cab with a V6? I was wondering what gear ratio I had and where I could go and find a 4. 3-liter, Gear ratios 1st 3. Parts ship same day!. Tinware: ring and pinion set, differential fluid. That dimension is 62-1/4" up to 64-3/4". Since the RPM's would be lower. All-wheel drive vehicles will split the torque front to back and side to side using a ratio determined best by the center differential. ) I am new to the board and new to the ownership of EBs. The charts I found ranged from very good to bad. High rpms get to be annoying after a while [QUOTE=rod7515] What r the costs of changing the gear ratio in a vette. 61 first gear ratio and with the stock 2. Most cars do not have it. All the trucks I'm looking at are at 455hp (a DD13 is at 400). I found different opinions on where the power was, how it was calculated, and even preceived. You also want to make sure that your tires can handle the extra torque that a steeper gear will create at the tires. What size tires are you running? Changing to a larger diameter tire can have the same effect as changing the gears to 3. mDRIVE™ The Mack mDRIVE™ transmission is an automated manual transmission built for Mack Pinnacle™ tractors. At the very beginning, under normal conditions this system divert only 10% torque to the rear axle (90:10 torque split); after 1996, the ratio was changed to 80:20; and finally starting 2010, the ratio was updated to 60:40. Automakers Offer Variety of Axle Ratios There is good reason automakers offer a variety of different axle. The only problem with this would be that you will have lower torque when starting off in first. 5 AAM Rear End for Your GM or Dodge (Part 1) Chris Tobin 2016-04-16 Diesel Tech / How-To Dodge GM Diesel trucks are built to handle a lot of abuse, but diesel enthusiasts like us tend to push way beyond the manufacturer’s intended performance levels. How To Select Proper Rear-End / Differential Gear Ratio May 7, 2015 Roadkill Customs How To & DIY A number of factors must be considered when selecting a rear-end gear ratio (ring & pinion set). Has a mostly stock 390, C6 Trans. 93 open rear end. 10 ratio GU5 Rear axle, 3. 55 gear ratio he recommended for his 33's will end up driving well or even close to it. You need to have a helper very accurately measure the radius of the tire with you and normal load, bike balanced on its tires as previously noted. Moving up to Class 6 and 7 trucks (up to 26,000 lbs. Login or register now to gain instant access to the rest of this premium content! Often overlooked, optional gear ratios play a key role in pickup truck performance. If the rear wheels should spin, the center differential can change the ratio to 53 percent front / 47 percent rear to control the slippage. The best idea for approaching the axle strength issue is to try to keep a reserve of strength while staying within the basic strength limits the axle housing and other parts, can handle. But, then again, keeping it in the 3. Clearly no answer is 100% absolute. I've read here that the same truck equipped with the Aisin and a 3. Tinware: ring and pinion set, differential fluid. Understanding rear gear ratios. Linda, yes, the axle code is stamped on the rear end. 5 is probly fine. The Final Drive is the last multiplier or torque before it reaches the wheels. Differential Type Conventional Availability Standard Ring Gear Diameter 7. Ford F-150 Vehicles With This Problem. Consider this: In 1970, the "standard" gear ratio for a GTO with a 350 HP 400, Muncie M-20 ("wide ratio", 2. With the torque of a 502, make sure the car is stiffened up, and the drivetrain up to the task. Then the formula would be calculated as: (38*3. 90 would have been ideal. I drove a 3. 90s, giving you that extra oomph on the track while maintaining a tolerable cruising RPM on the street. mileage on the display was 11. The drive axles associated with an open differential are interconnected by a bevel gear set designed to divide equal torque between drive axles. I would not use an FMX transmission because they are way less efficient than a C4 and not any stronger IMHO. 11 axle ratio, a 30-tooth over a 22-tooth QC ratio being 1. Several factors are affected by the axle ratio of a vehicle including fuel economy, towing capacity, and top speed. 21 is a lower ratio than either the old 645rfe with 3. Gear Ratio and Tire Size Chart NEXT PAGE This gear ratio and tire diameter chart is meant to give you an approximation of ideal RPMs at highway speed (65 mph) for three situations: fuel economy, every day driving and increased towing power. Genuine Dana Spicer Gears fit best and run quieter. i wouldn't say "best all around gear" by any means, but, ESPECIALLY since he has a stock motor, not to mention aod, i say 4. 73 if fuel economy is the primary concern. If you went the other way and changed the rear axle ratio, the engine would scream—4000 rpm at 75 mph with a 4. 10 when I first started my rear end build. All kidding a side it's pretty simple math, trans gear ratio x rear ratio = engine rpm. 5:1 range and cruise at a bit higher rpm that the torque converter stall speed in 1:1 gearing, if you have a over drive gear having a lock-up converter sure helps and a. 95 first gear). Times and requirements have changed making both the M21 and M22 the closest ratio production 4 speeds ever produced but also not practical for today's driving habits unless road racing is your thing. Because people like you want good economy The second gear in the 6 speed is equivelent to my 1st. Neither one is going to happen because the gear ratios are completely wrong for what you are trying to do. fyi, for all u throwing out rear end ratio's. AODE and 4R70W gearset ratio. 7/16" x 20. Final Drive. 6 differential is known to fail even on stock power levels. I then special ordered an economy car, specifying within the manufacturers options, engine size, rear end ratio, tire size (diameter), a 5-speed manual, etc. mileage on the display was 11. 11 for the short ratio's, but these would be a little high in rpm's on the highway. Most tires in the width you wanted will be in the 27-28" diameter. With a stockish 5. I changed from a 4:10 to a 3:08- the difference on the highway is significant. I lean towards 3:54 gears at 455hp. 55 rear end with an O/D transmission. 21 is a lower ratio than either the old 645rfe with 3. 30 ratio, it turns 4 1/3rd times for every revolution of the rear wheel. 1 rear gears. 13 to 1, help to get the car moving. Most tires in the width you wanted will be in the 27-28" diameter. 90 would have been ideal. Since the RPM's would be lower. Related Articles. 8 5th gear is more of a 5th pulling gear versus an overdrive gear and used more in. Each gear produces a different number of revolutions. I'm keeping my eyes out for a pulled front axle at the local salvage yards and if I find one, have been toying with the idea of ordering in a set of rear axle gears to go with it!. 00:1, at least in the 1968-1974 Javelins and AMXs, I don't know if they were available in the Rebel Machine, Hornet SC/360 or any other line. Lower RPM at cruising speed will produce a vibration that is often mistaken for driveshaft imbalance. ON SALE! Summer Sale Now On!! $ 2,699. Not much free way driving. But that gear ratio would most commonly be referred to as. Linda, yes, the axle code is stamped on the rear end. 10 when I first started my rear end build. For example, if a guy has a big four wheeler and gets maybe 35-38" mud tires on it, he may have to drop to a 4. I know that the 3. Mine has the 4. 88's on any tire size besides stock. Ratios of 4. Rearend gear ratio Transmission and DriveLine Questions. You need to have a helper very accurately measure the radius of the tire with you and normal load, bike balanced on its tires as previously noted. I could use some help in choosing the best rear end gear ratio for my 55 Chevy wagon. In Depth: 2017 Ford F-150 Buyer’s Guide. Let’s discuss the specifics of how to make your golf car faster. I am a fan of using the rear gear ratio and not the trans ratio to keep the car in power range and inversely if street driven cruising range, so a compromise is usually the case. Knowing the gear ratio of your F-150 is important if. This calculation is used to match oversize tires with new ring and pinion gears to obtain the desired engine RPM at highway speed. 11 rear end would be a high numerical ratio but a low mechanical one; a 2. 65 Final drive 3. Chevy 1500 p/u 2wd 88-98 (5. Numbers are good but gear ratios on paper are nowhere close to realistic when you actually drive the Jeep with all the variables the world throws at it. Diff Ratio Now that the circumferance of the wheels is known, and the ratios between the engine and road wheels, you can calculate the road speed for any RPM in a given gear Select your gear. For many performance cars, 3. If you care about the way that your truck drives when on the highway, and get annoyed that it won't stay in 6th gear during the slightest incline, you will want to seriously consider 4. GM’s number for this recall is N192261050. I have a three speed transmission and I can now cruise at a easy 55-60 and second is still low enough to make it up a steep hill. 08 rear gear. One of the standard ratio’s for positronic rear axle. So, for instance, a 4. 61 first gear ratio and with the stock 2. So again, unlike the GM and Dana axles that require a unique differential with different ratios, the Ford 8. 21 GEARS ON HIGHWAY COME ON GUYS THOUGHT YOU WAS ALL GEAR HEADS AND KNEW WHAT. Thus, because the two wheels are not driven with the same speed, a differential is necessary. Even on slight hills, it would shift back and forth out of 4th OD to 3rd and lugged a big. For highway cruising and best fuel economy stay towards the yellow (2600 rpm), around town daily driving is color coded green (2800 rpm), and for better towing power or just more 4-low power use the ratios near the red (3100. 31 axle ratio, the driveshaft turns 3 1/3rd times for every revolution of the rear wheel. 8 seconds, which is still pretty quick. Several factors are affected by the axle ratio of a vehicle including fuel economy, towing capacity, and top speed. 60:1 - Super highway economy. This is where an overdrive transmission is very advantageous. 21 in 7th gear. Also please check out the statistics and reliability analysis of Ford F-150 based on all problems reported for the F-150. 08 axles and 700R4 trans it got a best of 21 MPG. 8" gears, off-road ring and pinions, ring and pinion gear sets, master install kits, pinion kits, mini install kits, axles, ujoints, bearings, air lockers, triple drilled flange, diff housings, solid spacers and other Ford performance parts and accessories for your 8. When ordering, they will usually ask for a ring gear diameter and an "axle" spline count. 90 rear end gear. Looking for balance of power/gas mileage. How to Choose Your Axle Gear Ratio - Duration: Best Half-Ton Towing Truck!. Moving up to Class 6 and 7 trucks (up to 26,000 lbs. 73" are best suited for vehicles where gas mileage on the highway is the major concern. The Chart Although you should take the time to do the math and find out which ratio is best for your truck and tire combination, to make things easier use the following chart. It takes far more effort from the engine to start a car rolling from a dead stop with the 2:80 gear ratio than it does with the 4:11. Shifting at 5000rpm from 3rd gear into 4th (76mph), sees engine speed drop by almost 1500rpm, to a little over 3500rpm. During average use, the rear wheel horsepower required to drive a given car at highway speed is constant. 73 will be a good match for 8500 lbs. (Page 1 of 6). Too high a gear ratio and you lug the engine, and too low a ratio will over-rev the engine at high speeds. If you have a higher (lower #) gear than 3. 08 are the ring and pinion gear ratios in the rear axle. The height of your rear tires can effectively change the ratio of your rear end gears. Because gear "A" has 20 teeth and "B" has 40 teeth "A" will travel through two complete turns for every one complete turn of gear "B" this would give a ratio of 1:2. 5 mpg i figure, i need advice on a ratio change to get around 70mph at a more comfortable rpm. gear ratios (:1) 1st 2nd brakes 3rd - front 4th - rear 5th - abs steering wheel turns, lock-to-lock overall steering ratio turning circle diameter, curb-to-curb (ft) suspension - front - rear wheel size (in) tire size temporary spare tire curb weight (lbs ) fuel capacity (gallons) 6th steering type reverse power assist final drive. That puts me in the 2500 to 3000 range on the highway. Two of the key reasons for its popularity were the improved fuel consumption and the 3. It is a very important issue in terms of both highway and off road performance. need help rear differential on dodge ram 1500 was created by djm2009 Going to change the fluid in the rear differential. So again, unlike the GM and Dana axles that require a unique differential with different ratios, the Ford 8. The factory gear ratios in the transmission and rear-end are chosen to allow for RPM-friendly highway cruising, while still providing respectable acceleration and top speed figures. but like i said, both 3. You plan on moving up to 38". 08 are the ring and pinion gear ratios in the rear axle. The set up of a gear set can be accomplished by first measuring the carrier pinion. 75 is 44 and 44 divided by 2. 11 axle ratio, a 30-tooth over a 22-tooth QC ratio being 1. Power is transmitted from the transmission to rear end 1:1 in. Carefully count the number of full revolutions the driveshaft makes. The rear axle ratio is the number of times the driveshaft turns for every one wheel rotation. I don`t know whats in it now, I think its a 3. Any change in rear gear ratios will also require a change in speedo gearing, if you want the speedo to read correctly. Road jolts and shocks are reduced even further by the addition of front and rear variable-rate jounce bumpers. Note that the resultant gear ratio is just the product of the two separate gear ratios - (T1/T2)*(T3/T4). All of these affect the selection of the rear gear ratio. What rear axle ratio would be best for a large 5th wheel camper cross country trip? The new Super Duty diesel comes with three rear axle ratios: 3. I have seen to many screwed up differentials courtesy of these locations. IF you look at the pic below, you will see both sides toeing out with the right side toeing out more. I used the AOD ratios I. I agree with Dan. Automakers Offer Variety of Axle Ratios There is good reason automakers offer a variety of different axle. The charts I found ranged from very good to bad. 64 in the Kenworth for slightly lower cruising rpms, and 2. I'm loosing approx. 23 13 X 43 3. what would highway driving be like? I don't plan on doing highway which is why i was realistically thinking 4. I would not recommend a 200-4R for this application as it works best with a low rear gear ratio," Zack told me. Cost: $250-$300. 22 rifle when cornering on pavement. The gear ratio is the ratio of how many times your engine has to turn the crankshaft to turn the rear wheels one rotation. 73 10 bolt rear axle for a 12 bolt 4. 73 are going to drive you crazy. Driving it home at 55 did seem dangerous, 18 wheelers would fly up behind me and swerve to the other lane. For example, if a guy has a big four wheeler and gets maybe 35-38" mud tires on it, he may have to drop to a 4. 15 13 X 55 4. I avg about 18. Fixed gear bicycles are usually associated with track cycling, but many riders enjoy riding them on the road. Technically, the number should be expressed as a ratio, such as 3. Tip: It's best to seek out the help of an experienced professional when changing the rearend gears. The below table can be used to get a rough idea on gear ratios. 55 gears and affects on high end accleration? some highway driving can tell you that. Now I know that I could run this car just fine with this set up, but while I am rebuilding this car I was thinking that I should put a Posi-traction in it while I had the rear end out. Does any one have any back on the gas mileage for the above configurations. Use our Differential Gear Ratio Calculator page to determine the best ring and pinion gear ratio for your vehicle. He said that they would have similar performance on highway but that one was definitely better for in-town. Axle, Rear, Single Reduction: This type rear axle has one driving pinion and one ring gear that turns the axle shaft. 73 rear end ratio I am planning to order the electronic diff but have a question about the rear end ratios. 10's instead of the 3. With this gearing setup, everybody seems to think they will not be able to start out on a hill, but this is just not true. 73 gear ratio means the drive shaft will rotate 3. 0:1 LSD in Fairlanes and other medium performance cars, it's good enough to assume the ratio is fine for cruising and normal highway driving. 50:1 is a popular ratio when you still want to do occasional highway driving. thanks in advance !. for instance if your engine turns 2500rpm and you have a 1 to 1 high gear in transmission with a 4. High pinion rear = coast side of gears Low pinion rear = drive side of gears High pinion front = drive side of gears Low pinion front = coast side of gears The following statements are when moving forward. crate motor - and a big block even with a 4:11 type rear end will go fast, just get there. We offer a full line of new and remanufactured differentials, transmissions, and rear axle assemblies complete and ready to ship to you. 10s on 33's but the biggest thing I lost was speed! I got more acceleration with a lower top speed which is fine with me because I rarely hit the interstates or highways with higher speed limits. All highway -- 3. One higher ratio (lower gearing) would be useful for town or mountain driving and the lower ratio (higher gearing) for flat highway driving. A commonly overlooked component of a vehicle’s drivetrain that has a large effect on fuel economy is rear end gearing. 1 x 267-125 – Roll Pin. 30 Rear Axle Affect miles per gallon on a late model F350 with the 7. That is what we strive to do, using the best parts available such as:Eaton Tru Trac, Detroit Locker, Eaton Positractions, Strange nodular/ iron cases, and Strange aluminum cases, Motive Gear Trac Loc Posi's, ARB Lockers, Toms MADE IN THE USA Axles, AAM, Ford SVO High Performance rear end components. 5 3 Ways to Determine Final Drive Ratio. I avg about 18. (Especially because I've been tolerating 3. Page 1 of 2 - 3. I would not recommend a 200-4R for this application as it works best with a low rear gear ratio,” Zack told me. The colors represent ideal RPM's at highway speeds (65). Diff Ratio Now that the circumferance of the wheels is known, and the ratios between the engine and road wheels, you can calculate the road speed for any RPM in a given gear Select your gear. There is a whining noise from the rear end ( rear axle assembly / differential ) of my girlfriends 2000 gmc safari van. If the rear wheels should spin, the center differential can change the ratio to 53 percent front / 47 percent rear to control the slippage. 60:1 - Super highway economy. My top 5 reasons why I chose a 3. 7 overdrive ratio. 225S10 differential replaces the conventional differential internals used in certain 1973 - present GM axles. Unfortunately, the parts database just showed parts numbers, it didn't show the actual ratios, so I don't know the ratio of the other, "mystery" Outback 5th gear. In medium-duty trucks, gear ratios range from as low as 2. JK Gear Ratio's. While the 2 speed axle may not be feasible in a front wheel drive vehicle, it seems to me that in a rear wheel drive, two differential ratios might be beneficial. +++ Outer rear axle seal on 1987 to 1990 E-Z-GO gas GXT-1500 and GXI-1500 +++ 2000 and later E-Z-GO model 960 Cargo and Personnel Carriers. Transmission Gear Ratio Chart ~ Gear Ratios are listed for many popular transmissions Newest [ October 31, 2019 ] Mighty Metro ~ 1954 International Metro Van Build Builds and Examples. Choose top quality brands Dorman, G2 Axle & Gear, Motive Gear, Richmond Gear. 01:1 of the stock ratios. Cars use gear ratios in both the drive axle and the transmission for them to amplify the power from the engine. com is the most important platform for Golf cart rear axle product online whole sales, most of the golden suppliers on the platform comes from China, Shandong, Jiangsu in China(Main Land), they produce qualified Golf cart rear axle Golf cart rear axle with certifications as ul, vde, ce, ccc or rohs and support OEM and customized designs. It is graphed out in relation to tire diameter vs gear ratio. One higher ratio (lower gearing) would be useful for town or mountain driving and the lower ratio (higher gearing) for flat highway driving. 56 gear or lower to maintain the proper final drive ratio of his vehicle. 7/16" x 20. your obviously going to need to consider tire diameter, rear gear ratio and transmission gearing, generally your want the first gear in the transmission multiplied times the rear differential gear ratio to fall in the 10:1-10. Is this a good choice? I am going to get a rear axle next week and want to get the best gear. 90 Shelby® GT500® Unique Features 7 2014 05+ Mustang (197) Supplement, 1st Printing, December 2012 USA (fus). How often do you go to a repair shop and leave with more done than you expected for less than you were quoted? I came in for a gear swap in my truck and they fixed my broken exhaust hanger for me and I spent about $100 less than expected. Rear end gear whats the best? I have a 1965 Mustang and im going to put a 302 with a t-5 trans , it also running a 8. mileage on the display was 11. Differential Ratio Selection: Here is a quick guide to help you decide which differential ratio will best suit your needs based on an automatic, 3 or 4spd transmission please be advised that this is a guide only and is to be taken and used at face value 2. Several factors are affected by the axle ratio of a vehicle including fuel economy, towing capacity, and top speed. How to set up and ride a fixed-gear bicycle for road use. 10 gear ratio. Crawl Ratios And Off-Road Gearing: Everything You've Ever Wanted To Know! by the low range gear ratio and the axle ratio. A 10 speed direct with a 2. 10 gears compared to 3. If you have a higher (lower #) gear than 3. CHOOSING GEAR RATIOS For Best Performance - CF-301. Download the PDF. If you are having mileage issues and the engine is running at a higher cruise RPM on the highway then swapping in a lower numerical/higher mechanical ratio will help in that department. 11 rear gear axle ratio, adding extra wear to the engine and to your mental state. If I didn't have a lockup converter I would be constantly slipping with my converter on the highway. Installation of the correct ring and pinion gear ratio will help optimize performance, fuel economy and overall driveability. Also please check out the statistics and reliability analysis of Ford F-150 based on all problems reported for the F-150. We offer a full line of new and remanufactured differentials, transmissions, and rear axle assemblies complete and ready to ship to you. Rear end gears (2.