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Rear Axle Noise Diagnosis

Rear Axle Noise Diagnosis







 

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Drive Shaft Recall Finally

Drive Shaft Recall Finally


APRIL 13,2013

Chrysler also will recall 61,409 Dodge Nitro and Jeep Liberty sport-utility vehicles from the 2008 model year, and in the case of the Nitro, some 2007s because a part in the autos can drop onto the drive shaft, causing it to break.

If this happens, the vehicle will lose power suddenly, and it is possible that the side airbags will deploy. That force of the drive shaft breaking can trick the computer module that controls the airbags into thinking that the vehicle is in a “severe” crash, according to Chrysler.

The automaker said it is not aware of any accidents or injuries being caused by the problem


BS Just look here at Dodge Nitro.com!!!

SOURCE
 

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CHICAGO - FEBRUARY 8: Chrysler introduces the 2007 Dodge Nitro sport utility vehicle at the Chicago Auto Show February 8, 2006 in Chicago, Illinois. The Nitro is the first mid-size SUV offered by Dodge. The Chicago Auto Show opens to the public February 10 and runs through the February 19.


03/09/2013


DETROIT (AP) - Chrysler is recalling more than 78,000 midsize SUVs because the drive shafts can break.

The recall affects 2007 and 2008 Jeep Liberty and Dodge Nitro SUVs.

Chrysler says in documents filed with the government that a heat shield can drop and rub against the drive shaft, causing it to wear and break. If the shaft breaks, the SUVs will lose power and the side air bags may inflate. Chrysler says it doesn't know of any crashes or injuries from the problem.

Dealers will install a bracket to hold the shield in place at no cost to customers.

The recall affects 61,400 vehicles in the U.S., 13,700 in Mexico, 1,000 in Canada and 2,300 elsewhere.

Chrysler says it has received less than 40 complaints about broken drive shafts in the vehicles.


SOURCE
 

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I have a leak at my front diff area.

Noticed a small drop of what appeared to be oil on my driveway. This picture is of the front diff. looks like it could be coming from an axel? Does anyone know what this leak is and how much could i be looking at to fix?

Thanks in advance!

Chuck



 

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Hey Chuck, I actually had a similar problem not to long ago. I had no clue, looked on these forums and elsewhere for the answer. I did a quick search on google for fluid leaks front axle, and came upon this guys site, and he described exactly what I was facing, and what appears to be your problem too. Finding and Fixing Leaks - Eric The Car Guy- Stay Dirty!. This guy has some helpful tips and insight. Hope it helps.

If youre a DIY type of guy great. I just took mine to Lebanon Dodge, down the road from me. There are somethings I can do myself, but this was one thing I wasn't comfortable doing on my own.

Best regards!
 

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How a Differential works ?

How a Differential works ?

Published on Jun 11, 2014

Working of a differential is explained in a logical and illustrative manner in this animated video. Differential helps in turning the drive wheels at different rpm while the vehicle is taking a turn.
 

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Pinion Seal Replacement

Step-By-Step Pinion Seal Replacement



No matter what 4x4 you have, how new it is, or what axles are in it, you’ll eventually end up with a leaky pinion seal. And rightly so, these seals are in the most abused locations on your 4x4. They are often battered by trail debris, constantly covered in dust, frequently submerged in mud and water, and they receive absolutely zero maintenance. It’s a wonder they even survive as long as they do.

Inspect the components carefully when removing the yoke as a few different things can cause the leak. Try to figure out exactly where the leak is coming from. The leak could be coming from the seal press-in surface, the yoke splines, or the lip seal surface itself. Be sure that the pinion bearings are not worn. This can cause a leak at the seal surface. There should be no endplay or slop in the pinion. If the pinion yoke feels loose or sloppy, you may have bigger issues inside the differential. Our leak was obviously caused by rock damage. An aftermarket bolt-on pinion guard like those from Ruff Stuff Specialties could have kept this from happening to our Ford 9-inch.


LINK
 

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Rear axle playing

Hi did everyone here
My question is about rear axle playing... is it here some manufactured normal parameters for some playing acceptable?
Thank for any explanation and informations!
 

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Differential & Driveline - Nitro Issues


GEAR NOISE
Axle gear noise can be caused by insufficient lubricant, incorrect backlash, tooth contact, worn/damaged gears or the carrier housing not having the proper offset and squareness.
Gear noise usually happens at a specific speed range. The noise can also occur during a specific type of driving condition. These conditions are acceleration, deceleration, coast, or constant load.
When road testing, first warm-up the axle fluid by driving the vehicle at least 5 miles and then accelerate the vehicle to the speed range where the noise is the greatest. Shift out-of-gear and coast through the peak-noise range. If the noise stops or changes greatly check for:
Insufficient lubricant Incorrect ring gear backlash Gear damage
Differential side and pinions gears, usually do not cause noise during straight-ahead driving, when the gears are unloaded. The side gears are loaded during turns. A worn pinion mate shaft can also cause a snapping or a knocking noise.

BEARING NOISE
Bearing noise can be either a whining or a growling sound.
Pinion bearings have a constant high pitch noise, because it rotates at a faster rate. This noise changes with vehicle speed. If noise is heard under a load, the rear pinion bearing is the source. If noise is heard during a coast, the front pinion bearing is the source.

Differential bearings usually produce a low pitch noise. The differential bearing noise is constant and varies only with vehicle speed.

Axle shaft bearing noise generally changes when the bearings are loaded. Turn vehicle sharply to the left and the right during a road test. This will load and unload the bearings and change the noise level. If axle bearing damage is slight, the noise is usually not noticeable at speeds above 30 m.p.h.

LOW SPEED KNOCK

Low speed knock is generally caused by:
Worn U-joints/CV joint Worn side-gear thrust washers Worn pinion shaft bore

VIBRATION
Vibration at the rear of the vehicle is usually caused by:

Damaged drive shaft Missing drive shaft balance weight(s) Worn or out-of-balance wheels Loose wheel lug nuts Worn U-joints/CV joint Loose/broken springs Damaged axle shaft bearing(s) Loose pinion gear nut Excessive pinion yoke run out Bent axle shaft(s)

Check for loose or damaged front-end components or engine/transmission mounts. These components can contribute to what appears to be an axle vibration. Also look at engine accessories, brackets and drive belts.

DRIVELINE SNAP
A snap or clunk noise when the vehicle is shifted into gear or the clutch engaged, can be caused by:

High engine idle speed Transmission shift operation Loose engine/transmission/transfer case mounts Worn U-joints/CV joint Loose spring mounts Loose pinion gear nut and yoke Excessive ring gear backlash Excessive side gear to case clearance

To determined the source of a snap/clunk noise, raise vehicle on a hoist with the wheels free to rotate. Have a helper shift the transmission into gear and listen for the noise.
 

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DIAGNOSTIC CHART

NOTE:
All driveline components should be examined before starting any repair.

Condition Possible Causes Correction Wheel Noise

1. Wheel loose. 1. Tighten loose nuts.

2. Worn wheel bearing.
2. Replace bearing.

Axle Noise

1. Misaligned axle tube.
1. Inspect axle tube alignment. Correct as necessary.

2. Bent or sprung axle shaft.
2. Inspect and correct as necessary.

3. End-play in pinion bearings.
3. Refer to pinion pre-load information and correct as necessary.

4. Excessive gear backlash between the ring gear and pinion.
4. Check adjustment of the ring gear and pinion backlash. Correct as necessary.

5. Improper adjustment of pinion gear bearings.
5. Adjust the pinion bearings preload.

6. Loose pinion yoke nut.
6. Tighten the pinion yoke nut.

7. Scuffed gear tooth contact surfaces.
7. Inspect and replace as necessary. Axle Shaft Broke

1. Misaligned axle tube. 1. Replace the broken shaft after correcting tube mis-alignment.

2. Vehicle overloaded.
2. Replace broken shaft and avoid excessive weight on vehicle.

3. Erratic clutch operation.
3. Replace broken shaft and avoid or correct erratic clutch operation.

4. Grabbing clutch.
4. Replace broken shaft and inspect and repair clutch as necessary.

Differential Cracked

1. Improper adjustment of the differential bearings.
1. Replace case and inspect gears and bearings for further damage. Set differential bearing pre-load properly.

2. Excessive ring gear backlash.
2. Replace case and inspect gears and bearings for further damage. Set ring gear backlash properly.

3. Vehicle overloaded.
3. Replace case and inspect gears and bearings for further damage. Avoid excessive vehicle weight.

4. Erratic clutch operation.
4. Replace case and inspect gears and bearings for further damage. Avoid erratic use of clutch. Differential Gears Scored

1. Insufficient lubrication.
1. Replace scored gears. Fill differential with the correct fluid type and quantity. 2. Improper grade of lubricant.

2. Replace scored gears. Fill differential with the correct fluid type and quantity.

3. Excessive spinning of one wheel/tire.
3. Replace scored gears. Inspect all gears, pinion bores, and shaft for damage. Service as necessary.

Loss Of Lubricant
1. Lubricant level too high.
1. Drain lubricant to the correct level.

2. Worn axle shaft seals.
2. Replace seals.

3. Cracked differential housing.
3. Repair as necessary.

4. Worn pinion seal.
4. Replace seal.

5. Worn/scored yoke.
5. Replace yoke and seal.

6. Axle cover not properly sealed.
6. Remove, clean and seal cover.

Axle Overheating

1. Lubricant level low.
1. Fill differential to correct level.

2. Improper grade of lubricant.
2. Fill differential with the correct fluid type and quantity.

3. Bearing pre-loads too high.
3. Adjust bearing pre-loads.

4. Insufficient ring gear backlash.
4. Adjust ring gear backlash. Gear Teeth Broke

1. Overloading.
1. Replace gears. Examine other gears and bearings for possible damage.

2. Erratic clutch operation.
2. Replace gears and examine the remaining parts for damage. Avoid erratic clutch operation.

3. Ice-spotted pavement.
3. Replace gears and examine remaining parts for damage.

4. Improper adjustments.
4. Replace gears and examine remaining parts for damage. Ensure ring gear backlash is correct.

Axle Noise

1. Insufficient lubricant.
1. Fill differential with the correct fluid type and quantity.

2. Improper ring gear and pinion adjustment.
2. Check ring gear and pinion contact pattern.

3. Unmatched ring gear and pinion.
3. Replace gears with a matched ring gear and pinion.

4. Worn teeth on ring gear or pinion.
4. Replace ring gear and pinion.

5. Loose pinion bearings.
5. Adjust pinion bearing pre-load.

6. Loose differential bearings.
6. Adjust differential bearing preload.

7. Ring gear run-out.
7. Measure ring gear run-out. Replace components as necessary.

8. Loose differential bearing cap bolts.
8. Inspect differential components and replace as necessary. Ensure that the bearing caps are torqued to specifications.

9. Housing not machined properly.
9. Replace housing.
 

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NO ADJUSTMENT
The axle play is because the axles are retained by c clips which sit in a groove on the axle shafts inside the differential. It's not wear or anything, just how they are.
Rear axle has some side to side play (in out not up down). Is this normal for this dana axle?
I can see the axle moving side to side and see the retaining clips too. It appears the groove for the clips is wider than the clips letting the axles move side to side.
Anything from a worn out axle, axle bearing, rear end fluid are posted on other sites as possible causes. Not much help, sorry. Please post a repair if you get that far. Thanks and Good Luck.
 

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Propeller shaft diagnosis and testing

PROPELLER SHAFT
DIAGNOSIS AND TESTING


PROPELLER SHAFT VIBRATION
DRIVELINE VIBRATION



A out of round tire or wheel that is out of balance, will cause a low frequency vibration.
Brake rotors that are unbalanced will cause a harsh, low frequency vibration.
Driveline vibration can be caused by loose or damaged engine mounts.

Drive Condition Possible Cause Correction Propeller Shaft Noise

1. Undercoating or other foreign material on shaft.
1. Clean exterior of shaft and wash with solvent.

2. Loose propeller shaft.
2. Install new screws and tighten to proper torque.

3. Loose or bent joint or excessive runout.
3. Install new propeller shaft.

4. Incorrect driveline angularity.
4. Measure and correct driveline angles.

5. Worn joint.
5. Install new propeller shaft

6. Propeller shaft damaged or out of balance.
6. Install new propeller shaft.

7. Broken rear spring.
7. Install new rear spring.

8. Excessive runout or unbalanced condition.
8. Re-index propeller shaft, test, and evaluate.

9. Excessive drive pinion gear shaft runout.
9. Re-index propeller shaft and evaluate.

10. Excessive pinion flange deflection.
10. Inspect and replace propeller shaft if necessary.

11. Excessive transfer case runout.
11. Inspect and repair as necessary.

Joint Noise
1. Loose screws.
1. Install new screws and tighten to proper torque.

2. Lack of lubrication.
2. Replace propeller shaft as necessary.

A out of round tire or wheel that is out of balance, will cause a low frequency vibration.
Brake rotors that are unbalanced will cause a harsh, low frequency vibration.
Driveline vibration can be caused by loose or damaged engine mounts.
 

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