drive axle

Question 1

Excessive pinion to ring gear backlash

Answer 1

Noise on drive/Adjust

Question 2

Worn pinion and ring gear

Answer 2

noise on drive/Replace

Question 3

worn pinion bearings

Answer 3

noise on drive/ Replace

Question 4

loose pinion bearing

Answer 4

noise on drive/adjust

Question 5

excessive pinion end play

Answer 5

noise on drive/ Adjust

Question 6

Worn differential bearings

Answer 6

noise on drive/ Replace

Question 7

Loose differential bearings

Answer 7

noise on drive/Adjust

Question 8

Excessive ring gear run out

Answer 8

noise on drive/replace

Question 9

Low lubricant level

Answer 9

noise on drive/ Replenish

Question 10

Wrong grade lubricant

Answer 10

noise on drive/Replace

Question 11

Bent axle hoising

Answer 11

noise on drive/Replace

Question 12

Axle noises heard on drive will usually be heard on coast although not as loud

Answer 12

noise on coast/ Adjust/Replace

Question 13

Pinion and ring gear too tight ( audible when decelerating and disappears when driving)

Answer 13

noise on coast/Adjust

Question 14

Warped ring gear

Answer 14

Intermittent noise/Replace

Question 15

Loose differential case bolts

Answer 15

Intermittent noise/Tighten

Question 16

Flat spot on pinion or ring gear teeth

Answer 16

Constant noise/ Replace

Question 17

Flat spot on bearings

Answer 17

Constant noise/ Replace

Question 18

Worn pinion splines

Answer 18

Constant noise/ Replace

Question 19

Worn axle shaft dowel holes

Answer 19

Constant noise/ Replace

Question 20

Worn hub studs

Answer 20

Constant noise/ Replace

Question 21

bent axle shaft

Answer 21

Constant noise/ Replace

Question 22

Worn differential side gears and pinions

Answer 22

noise on turns/Replace

Question 23

worn differential spider

Answer 23

noise on turns/Replace

Question 24

worn differential thrust washers

Answer 24

noise on turns/Replace

Question 25

Worn axle shaft splines

Answer 25

noise on turns/Replace

Question 26

Fracture of ring gear teeth and tooth toe.

Answer 26

Shock impact loading
incorrect adjustment.
Correction: Replace as match set, follow adjustment procedure.

Question 27

Pitted drive pinion
Problem and Correction

Answer 27

Extremely severe service
Insufficient lubrication.
Correction: replace as match set, use correct lubrication and interval schedule.

Question 28

scored or worn thrust washer surfaces
Problem and Correction

Answer 28

Insufficient/ improper/contaminated lubrication.
Correction: replace any scored/worn washer that is .005” thinner then new one.
use correct lubricant and proper level and interval schedule.

Question 29

Bent axle housing
Problem and cause

Answer 29

vehicle overloading
vehicle accident
shock loading.
Correction: Replace axle housing.

Question 30

Fractured axle shaft at flange
Problem and Correction

Answer 30

loose wheel bearing.
Bent axle housing
Loose shaft to wheel hub bolts.
Correction: replace the shaft.
check housing distortion, make certain wheel bearings aren’t worn or misadjusted