Hummer H2. Manual - part 89

DRIVE SHAFT FLANGES 

See Companion Flanges.  

DRIVE SHAFTS AND HALF SHAFTS 

Drive Shafts and Half Shafts 

DUST BOOTS 

replacement. 

Distorted 

A 

Require repair or 

replacement. 

Missing 

C 

Require replacement. 

Positioned incorrectly 

B 

Require repair or 

replacement. 

Stepped 

A 

Require repair or 

replacement. 

Worn to the extent that it no longer performs its 
intended function 

A 

Require repair or 

replacement. 

Condition 

Code 

Procedure 

Balance weight missing 

C 

Require repair or replacement. 

Bearing cap bore distorted 

A 

Require repair or replacement. 

Bent 

A 

Require replacement. 

Bolt holes elongated 

A 

Require repair or replacement. 

Bushing or seal surface worn, affecting 
performance 

A 

Require repair or replacement. 

Leaking through soft yoke plug 

A 

Require repair or replacement 

of soft yoke plug. 

Out of balance 

A 

Require repair or replacement. 

Retainer strap bent 

A 

Require replacement of retainer 

strap. 

Slip yoke broken 

A 

Require replacement. 

Splines worn, affecting performance 

A 

Require replacement. 

Splines worn, not affecting performance, but 
close to the end of their useful life 

1 

Suggest repair or replacement. 

Threads damaged 

A 

Require repair or replacement. 

Threads stripped (threads missing) 

A 

Require replacement. 

U-bolt damaged, affecting performance 

A  Require replacement of U-bolts. 

Yoke damaged, affecting performance 

A 

Require repair or replacement 

of yoke. 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

  

Dust Boots 

ENGINE MOUNTS 

See Mounts (Engine, Transaxle, and Transmission).  

EXCITER RINGS 

See Toothed Rings (Tone Wheels).  

FILLER TUBES 

See Dip Stick Tubes.  

FILTERS AND SCREENS 

Filters and Screens 

FLANGES 

NOTE:

Does not include CV boots. 

Condition 

Code 

Procedure 

Cracked, not leaking 

1 

Suggest replacement. 

Missing 

C 

Require replacement. 

Leaking 

A 

Require repair or replacement. 

Torn 

A 

Require replacement. 

Weather checked, surface cracked 

No service suggested or required. 

Condition 

Code 

Procedure 

At service interval 

3 

Suggest replacement. 

Bent 

A 

Require repair or replacement. 

Exceeding service interval 

3 

Suggest replacement. 

Missing 

C 

Require replacement. 

Near service interval 

3 

Suggest replacement. 

Restricted 

A 

Require repair or replacement. See 

note below. 

NOTE: Further inspection may be required to determine the source of restriction or 
contamination. 

Torn 

A 

Require replacement. 

Worn, affecting performance (metal or nylon 
screen type) 

A 

Require repair or replacement. 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

  

See Companion Flanges.  

FLEX PLATES 

Flex Plates 

FLUID LEVEL INDICATORS 

See Dip Sticks (Fluid Level Indicators).  

FLUIDS AND LUBRICANTS 

Fluids and Lubricants 

Condition 

Code 

Procedure 

Bent, affecting performance 

A 

Require replacement. 

Bent, not affecting performance 

No service suggested or 

required. 

Bolt or stud holes elongated 

B 

Require replacement. 

Broken 

A 

Require replacement. 

Cracked 

A 

Require replacement. 

Ring gear worn close to the end of its useful life 

1 

Suggest replacement. 

Ring gear worn to the extent that it no longer performs 
its intended function 

A 

Require replacement. 

Weights missing 

A 

Require repair or 

replacement. 

Condition 

Code 

Procedure 

Application incorrect 

B 

Require replacement. See note 

below. 

NOTE: Determine and correct cause. 

At service interval 

3 

Suggest replacement. 

Beyond service interval 

3 

Suggest replacement. 

Burned 

Further inspection required. See 

note below. 

NOTE: Fluid that is burned indicates a serious problem. Determine and correct the 
cause. 

Contaminated, for example, fluid other than 
hydraulic fluid present 

A or B  Require service. See note below. 

NOTE: If a fluid other than the correctly specified fluid is present in the hydraulic 
system which DOES affect the rubber parts, the required service is to: 1) remove all 
components having rubber parts from the system, 2) flush lines with denatured alcohol 
or hydraulic cleaner, 3) repair or replace all components having rubber parts, and 4) 
bleed and flush with correct hydraulic fluid. (Code A)  

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

  

FLYWHEELS 

Flywheels 

NOTE: If a fluid other than the correctly specified fluid is present in the hydraulic 
system which DOES NOT affect the rubber parts, the required service is to flush and fill 
with the correct hydraulic fluid. (Code B) 

Exceeding service interval 

3 

Suggest replacement. 

Hydraulic fluid incorrect 

B 

Require service. See note below. 

NOTE: If a fluid other than specification hydraulic fluid is present in the hydraulic 
system, the required service is to flush and fill with the correct hydraulic fluid. 

Level incorrect 

B 

Require correction of fluid level. 

Near service interval 

3 

Suggest replacement. 

Rubber master cylinder cover gasket distorted 
and gummy 

A 

Require service. See note below. 

NOTE: If a fluid other than the correctly specified fluid is present in the hydraulic 
system which DOES affect the rubber parts, the required service is to: 1) remove all 
components having rubber parts from the system, 2) flush lines with denatured alcohol 
or hydraulic cleaner, 3) repair or replace all components having rubber parts, and 4) 
bleed and flush with correct hydraulic fluid. 

Varnished 

Further inspection required. See 

note below. 

Note: Fluid that is varnished may indicate a serious problem. Determine and correct the 
cause. 

NOTE:

Clutch disc replacement does not necessitate flywheel reconditioning, unless 
other conditions justify the reason to do so. 

Condition 

Code 

Procedure 

Attaching hardware broken 

A 

Require repair or replacement of 

hardware. 

Attaching hardware missing 

C 

Require replacement of hardware. 

Attaching hardware not functioning 

A 

Require repair or replacement of 

hardware. 

Cracked (other than mounting area) 

A 

Require resurfacing or 

replacement. See note below. 

NOTE: Some manufacturers allow slight surface cracking in the friction surface. 

Cracks in mounting area 

B 

Require replacement. 

Hard spots 

B 

Require repair or replacement. 

Ring gear broken 

A 

Require replacement of ring gear . 

Ring gear teeth worn, affecting performance 

A 

Require replacement of ring gear. 

Runout exceeds specifications 

B 

Require repair or replacement. 

Scored 

B 

Require repair or replacement. 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION