Differentials

A differential is a mechanical device that transfers torque from one shaft to two other shafts. These devices are frequently used in the automotive industry and come in a variety of forms depending on the application.

1,806 Questions
American Cars
Differentials
Bicycles

What is granny gear?

Granny gear is a term used for truck manual transmissions extremely low first gear.This type of transmission would be one that when driving normally around town you would start out in second gear.the very low gear reduction of the first gear would be used for low speed pulling or crawling where the extra torque is needed.

ANS 2 - Granny gear is also used in bicycles. On any bike with three chainrings, the smallest, innermost ring is often referred to as the"granny", or the bailout gear. Having to drop to the smallest chainring is often seen as the last resort before having to get off and push the bike, if the incline gets too steep for any of the "regular" gears.

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Fuel Filters
Differentials
Dodge Ram

How do you change rear pinion bearing on a 2004 dodge 1500 ram 4x4?

1. remove rear drive shaft.2.remove diff.cover.3.remove both axles.4.remove carrier case assy.5.remove drive shaft yoke.6.tap pinion gear out of housing with (brass hammer).7 remove pinion seal and front pinion bearing.8.rear pinion bearing well need pressed off & on the pinion gear.9.you need to use a punch drive the bearing race from housing both.

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Differentials

What would cause rear differential chatter?

excessive backlash

183184185
Differentials
Ratios (mathematical)

How do you find the gear ratio of an axle?

There are four ways to find a ratio.

1 A dealer can normally tell from the vin number.

2 There are normally tags or labels on the axle that have part number, gear ratio, and fluid requirement

info.

3 You can count how many times you have to turn the driveshaft to get one complete turn of the tires.

4 You can divide the number of teeth on the ring gear and divide by number of teeth on the pinion.

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Differentials
Toyota Matrix

Does the 2003 Toyota Matrix have rear differential?

No, a 2003 Matrix is front wheel drive with power getting to the wheels via CV joints.

151152153
Differentials
Chevy Silverado
Late Model 1979-New Ford Mustangs

What is the rear-end gear ratio on a 2005 mustang GT automatic?

3.31:1 on automatics and 3.55:1 on manual transmission 2005-2008 mustang GT's In at least 2007, 3.31 gears were standard on a manual transmission but 3.55's were offered as an option.

The Rear Axle Code is on the door sticker...

BG - 3.31 - non-limited slip

CD - 3.55 - limited slip

CG - 3.31 - limited slip

145146147
Chevrolet
Differentials

How many teeth are on a ring gear and pinion for a 4.11 gear ratio?

One key to this design problem is to remember that gears must have a whole number of teeth. It is impossible to roll a gear against another gear that has, say, half, a tooth somewhere among the whole teeth. So gears always have a whole number of teeth.

Another key is that the gear ratio is the ratio of the numbers of teeth on two gears, N1 divided by N2. The result of this division often produces a fraction AND the fraction is often ROUNDED OFF in printed materials. Because of this round-off, you cannot be certain what the actual fraction is. This means that, even when you find whole-number values for N1 and N2, you cannot be certain that they represent the exact numbers.

So, here is how to find the pair of gears from a given gear ratio such as 4.11. First, examine the fraction, 0.11, from the ratio. Find a whole number m such that m times the fractional part of the gear ratio gives another whole number almost exactly? Try m = 2, 3, 4 ... up to 16 or even more until you find a good fit.

For the given problem, 9 x 0.11 = 0.99, which is almost 1.

That whole number m is the SMALLEST possible number of teeth for one gear.

Multiply the gear ratio by m and round to a whole number to get the least number of teeth on the second gear. So, 9 teeth is the smallest number of teeth for one gear and 9 x 4.11 = 36.99 (that is, 37) is the smallest number of teeth for the other gear.

You can multiply the number of teeth on both gears by any whole number without changing the gear ratio. So, 2 x 9 = 18 teeth and 2 x 37 = 74 teeth also have the ratio 37 / 9 = 4.11111...

Here is how to tweak the result if the fraction you chose didn't give a satisfactory result:

Multiply the number of teeth from the trial answer by any whole number, say 2 or 20.

20 x 9 = 180 and 20 x 37 = 740

Now subtract 1 from the number of teeth on the larger gear and calculate the gear ratio.

740 - 1 = 739 and 739 / 180 = 4.105555...

Alternatively, add a tooth to the larger gear and check that ratio: 741 / 180 = 4.116666...

One key to this design problem is to remember that gears must have a whole number of teeth. It is impossible to roll a gear against another gear that has, say, half, a tooth somewhere among the whole teeth. So gears always have a whole number of teeth.

Another key is that the gear ratio is the ratio of the numbers of teeth on two gears, N1 divided by N2. The result of this division often produces a fraction AND the fraction is often ROUNDED OFF in printed materials. Because of this round-off, you cannot be certain what the actual fraction is. This means that, even when you find whole-number values for N1 and N2, you cannot be certain that they represent the exact numbers.

So, here is how to find the pair of gears from a given gear ratio such as 4.11. First, examine the fraction, 0.11, from the ratio. Find a whole number m such that m times the fractional part of the gear ratio gives another whole number almost exactly? Try m = 2, 3, 4 ... up to 16 or even more until you find a good fit.

For the given problem, 9 x 0.11 = 0.99, which is almost 1.

That whole number m is the SMALLEST possible number of teeth for one gear.

Multiply the gear ratio by m and round to a whole number to get the least number of teeth on the second gear. So, 9 teeth is the smallest number of teeth for one gear and 9 x 4.11 = 36.99 (that is, 37) is the smallest number of teeth for the other gear.

You can multiply the number of teeth on both gears by any whole number without changing the gear ratio. So, 2 x 9 = 18 teeth and 2 x 37 = 74 teeth also have the ratio 37 / 9 = 4.11111...

Here is how to tweak the result if the fraction you chose didn't give a satisfactory result:

Multiply the number of teeth from the trial answer by any whole number, say 2 or 20.

20 x 9 = 180 and 20 x 37 = 740

Now subtract 1 from the number of teeth on the larger gear and calculate the gear ratio.

740 - 1 = 739 and 739 / 180 = 4.105555...

Alternatively, add a tooth to the larger gear and check that ratio: 741 / 180 = 4.116666...

113114115
Car Sounds
Differentials
Ford Ranger XL
Ford Ranger XLT

How can you quiet a noisy rear differential?

if its whiny gears, banana skins,, seriously,, but it wont last long, & its not really that good for the diff.

if its bearings,, lots of grease, but again, only a very temporary fix!

if its the gears, they need to be re-hardened, its often cheaper to get a second hand diff head. or new gears.

if its the bearings, replace them.

101102103
GMC Envoy
Differentials

How often to change 2003 gmc envoy differential fluid?

every 50,000 miles

101102103
Cars & Vehicles
Differentials
Need for Speed

Does every car have a differential?

Yes, although depending of whether you have a front wheel or rear wheel drive, the differential will be set up differently. A differential is just a set of mechanical gears that equalizes the power between the left and right drive wheels, particularly when cornering, when the outside wheel travels further than the inside wheel.

It depends on whether or not your car needs a differential. Nascars do not have a differential because those cars always turn in one direction throughout the race. Gokarts (yeah, I know,they aren't cars) do not have a differential.

101102103
Differentials
Dodge Ram

Do you need a transfer case in a 1998 dodge ram to drive the truck?

If 4wd yes you also have two other options. You can gut the transfer case, make it just an extension off the transmission. Or you can buy a new driveline off a 2wd ram which will be longer. Longer shaft will reach transmission and allow you to drive. you will also have to remove the front driveline.

99100101
Transmissions and Drivetrains
Differentials
Ford Escort ZX2
Rosa Parks

Why would it be difficult to depress the button that locks the gearshift in Park?

the car has a cable between the key and the transmission shifter. if this cable is worn it can be very difficult to shift from park, and will only get worse. I just disconnected mine, but you will probably want to get a new one installed at any auto shop. In our 92 Camry, my brake switch had gone bad. We had not noticed the rear light out, but I had extreme problems shifting out of park to either drive or reverse. Once the switch was replaced, smooth sailing! The car was not sensing that the brake was depressed to release the gearshift button.

959697
Differentials
Chevy Suburban

How do you change the differential fluid in a 1999 Suburban 1500?

You have to remove the rear cover on the differential housing. Once the fluid is all drained, replace cover with new gasket (or use silicone sealer) and refill through 3/8" square plug on the side of the unit.


One other point to this. Replacing the fluid can be a bit tricky. By the time you get yourself, your tools, and your bottle of fluid under the truck it can be a challenge to the fluid in the differential. To ease the problem, get a small section of hose to connect to the spout of the bottle and then run the other end into the differential and squeeze. It is pretty easy and faster.

949596
Differentials

How much fluid in a 2001 f550 rear differential?

there is 2 plugs on dif. One at the bottom for drain and 2nd is for top off top off your dif until when you place your finger into the hole and touch downwords you can feel and see fluid on your finger.

939495
Differentials
1995-1999 Dodge & Plymouth Neons

1996 dodge neon It wont shift to 2nd 4th or reverse?

Is it an automatic? Time for a new transmission... If a stick and 1st, 3rd, 5th are ok, then you have a possible shift cable problem. You should be able to see them on top of the trans. If everthing is moving properly the trans has an internal problem.

899091
Transmissions and Drivetrains
Differentials
Chevy Silverado
Scooters and Mini-Bikes

Gear ratio for turbo 350 trans?

1st- 2.52:1

2nd- 1.52:1

3rd-1:1

636465
Differentials

What is the difference between a CBC with a manual differential and a automated differential?

Most analysers provide an automated differential with the white cell count, red cell count, and indices. If for some reason, the differential is rejected, or flagged on the automated differential provided, the differential must be performed manually by properly trained technologists. A manual differential involves making a smear on a glass slide and staining the slide with Wright's stain which is a combination of acid and basic dyes. The stain results in white blood cells staining blue and the red blood cells staining red, platelets also appear blue. 100 white blood cells are counted under a microscope-dividing them into the 5 white cell types and evaluating the cells for abnormalities. The red cells are observed for size, shape, and hemoglobin content. The number of platelets is estimated as well. The absolute number of each white cell line is then reported using the percentage of each cell type and with white cell count.

798081
Cars & Vehicles
Differentials

How does an electronic differential in automobiles work?

In conventional road vehicles an electronic differential is usually a mechanical differential that uses an onboard computer to directly control and adjust the torque split and difference in wheel speed across the axle. This is acheived by electronic actuators engaing clutch packs and locking mechanisms to acheive the desired traction condition. It is esentially a computer controlled LSD and differential lock in one. This means the computer can calculate the optimal torque split and actively vary it on the fly. In electric vehicles with separate motors driving each wheel, an electronic differential is simply a computer that controls the wheel speed of the inside and outside wheels based on the steering wheel angle, to acheive the same effect as a normal mechanical differential.

818283
American Cars
Differentials
Chevy Suburban
Ford F-250

How do you determine the rear axle ratio 2001 F-150 Supercrew 5.4l v-8?

sometimes there is a tag under the hood with the specifcations for your truck. along with sparkplug gap etc. there might also be a tag in the glove box with the special code for that feature. G4=3:73 gear ratio,etc. owners manual in specifications section?

798081
Differentials
Chevy Suburban
Ford Windstar SE

Where do you put in the rear differential fluid?

The rear differential fluid goes directly into the rear differential. There is normally an inset plug that has a square drive on it that accepts a 3/8" ratchet or ratchet extension. Remove this plug. If fluid comes out, you do not need to add any. If no fluid comes out, add enough of the fluid recommended by your vehicle manufacturer (normally 80/90 gear lube, but not always) where you took out the plug, until it starts to seep out the plug hole. Replace the plug and you're finished.

798081
Differentials
Chevy Tahoe
Ford Ranger XL

What is the rear differential capacity on a 99 Chevy Tahoe?

When the fluid falls below the bottom of the filler plug hole it is time to add fluid. Add fluid until the level reaches the bottom of the filler plug hole. In other words, add fluid(while parked on a level surface)until it begins to run out. I have a 99 Tahoe and the manual doesn't list any quantity/capacity for the differential, only how to check the level and refill if needed. Mike

787980
Differentials
Dodge Ram
Detroit

Is it work putting a Detroit locker in a Dodge Ram that has a limited slip rear-end?

you've made me think about my own 4x4 which has a posi-track rear end. The reality is that most 4x4's are actually only 2 wheel drive. For example if u drive half in the mud and half on the pavement - only the wheels in the mud will have power to them and all power will be lost to the wheels on the pavement. That is just stupid for somone who loves wheelin. Jack one wheel off the ground with a floor jack under the axle and see if u can take off (slowly) in two wheel high (don't lock in the front) - hold on I'm going to go try that right now...if the wheel off the ground spins and u r not getting power to the wheel on the ground then hey - it's worth it to put in the locker.

BRB - well looks like I'll be installing a locker. The tire off the ground spun like mad and if I was stuck I would be going a whole lot of nowhere...

Chris

777879
Differentials
Chevy Camaro Z28
1995-2005 Chevy Cavaliers

If a 99 Camaro Z28 doesn't have a traction control switch can you add one?

Yes you can. However, it's fairly complicated. You need to source the parts from a junked car of the same year and equipment. It's probably not worth it... less hassle to just trade in for an ASR-equipped car.

Just keep watching eBay or craigslist or find a car being parted on eBay there are tons of them and just keep asking all of them if they have a switch.

If the system is already installed why do you need to get parts from a salvaged car? It seems you can find a switch anywhere.

767778
Differentials
Chevy Silverado
Chevy Astro

What is wring if a 1992 Astro Van 6 cylinder stalls when in low gear?

The full and correct answer to this problem would take up a book, as many things could cause it and a complete list is almost impossible. Possible Causes: *Bad Fluid *Bad Filter *Bad or clogged lines *Bad wiring to the transmission (if overdrive) *Bad Lockup converter (if overdrive) *Bad or incorrect Band Adjustment *Problem with the VSS (vehicle speed sensor) My suggestion would be to take this to a reputable transmission shop and have them check it out.

737475
Transmissions and Drivetrains
Differentials

Why is it that when the car is in gear the tire spins nonstop?

Of course my first question is, are you moving? If not, have you snuck up on it late at night? Is the engine running? It's very common for a tire to spin when the transmission is engaged and engine running, the main purpose of a transmission is to transmit the rotational power of the engine to the tires. You neglected to say whether the tires are in ground contact or not. If they are your idle is set WAY to high, if not, wheel spin is completely normal with either a manual or automatic.

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