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Hummer H2. Manual - part 156

YUGO

(4)

(2)

2003 2WD

...

(2)

...

(1)

Press TRACS or STC switch located on dash. Indicator light will illuminate when
system is disabled.

(2)

Press STC/DSTC switch on center console and hold down for more than half a
second. The light in the switch will go off when system is disabled.

(3)

Press STC, DSA or DSTC switch located on dash to disable system. Indicator light
will illuminate when system is disabled. On models equipped with winter/wet
driving mode, depress the "W" switch on center console. The LED on switch will
turn off when winter/wet driving mode is disengaged.

(4)

Cannot be shifted to 2WD.

Application FWD RWD Part Time 4WD Full Time 4WD AWD TCS Do Not Test
GV & GVL

1985-91

...

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Traction Control, 4WD & AWD Identification & Disable Procedures - All Models

GENERAL INFORMATION

Clutch Trouble Shooting

ALL MODELS

CLUTCH TROUBLE SHOOTING

Problem & Possible Cause

Action

Clutch Chatters/Grabs

Incorrect Pedal Adjustment

Adjust Free Play

Worn Input Shaft Spline

Replace Input Shaft

Binding Pressure Plate

Replace Pressure Plate

Binding Throw-Out Lever

Check Throw-Out Lever, Check Throw-Out

Bearing, Check Bearing Retainer

Uneven Pressure Plate Contact With
Flywheel

Align/Replace Worn Parts

Transmission Misaligned

Align Transmission

Worn Pressure Plate

Replace Clutch Assembly

Oil-Saturated Disc

Replace Clutch Assembly, Repair Oil Leak

Loose Engine Mounts

Replace Engine Mounts

Clutch Pedal Sticks Down

Clutch Cable Binding

Replace Clutch Cable

Weak Pressure Plate Springs

Replace Clutch Assembly

Binding Clutch Linkage

Lubricate Linkage

Broken Clutch Pedal Return Spring

Replace Return Spring

Clutch Will Not Release

Oil-Saturated Disc

Replace Clutch Assembly, Repair Oil Leak

Defective Disc Face

Replace Clutch Assembly

Disc Sticking on Input Shaft Splines

Replace Disc/Input Shaft

Binding Pilot Bearing

Replace Pilot Bearing

Faulty Clutch Master Cylinder

Replace Master Cylinder

Faulty Clutch Slave Cylinder

Replace Slave Cylinder

Blown Clutch Hose

Replace Hose

Sticky Throw-Out Bearing Sleeve

Clean/Lube Sleeve

Clutch Cable Binding

Replace Clutch Cable

Broken/Loose Bellhousing

Check Bellhousing

Rattling/Squeaking

Broken Throw-Out Lever Return
Spring

Replace Return Spring

Faulty Throw-Out Bearing

Replace Throw-Out Bearing

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Clutch Trouble Shooting

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Clutch Trouble Shooting

Faulty Clutch Disc

Replace Clutch Disc

Faulty Pilot Bearing

Replace Pilot Bearing

Worn Throw-Out Bearing

Replace Throw-Out Bearing

Dry Bearing Retainer Slide For
Throw-Out Bearing Sleeve

Lubricate Slide

Slipping

Faulty Pressure Plate

Replace Clutch Assembly

Worn Clutch Disc

Replace Clutch Assembly

Incorrect Alignment

Realign Clutch Assembly

Faulty Clutch Slave Cylinder

Replace Slave Cylinder

No Pedal Pressure

Leaky Hydraulic System

Check Clutch Master Cylinder, Check Clutch

Slave Cylinder

Check Clutch Hose

Broken Clutch Cable

Replace Clutch Cable

Faulty Throw-Out Lever

Replace Throw-Out Lever

Broken Clutch Linkage

Repair Clutch Linkage

Noisy Clutch Pedal

Faulty Safety Switch

Check/Replace Switch

Noisy Self-Adj. Ratchet

Replace Ratchet

Dry Throw-Out Bearing

Replace Throw-Out Bearing

Dry Pilot Bearing

Replace Pilot Bearing

Worn Input Shaft

Replace Input Shaft

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Clutch Trouble Shooting

GENERAL INFORMATION

Manual Transmission Trouble Shooting

INTRODUCTION

There are many times when the transmission is incorrectly blamed for shifting problems or noises that are
actually caused by other reasons. Shift difficulties are frequently caused by conditions outside of the
transmission or transaxle. Typical conditions include: shift linkage, shift cables, alignment of engine to
transmission, worn engine mounts or clutch problems. Drive train noises may come from many sources such as
tires, road surfaces, wheel bearings, differentials, engine or exhaust system. Repairing or overhauling
transmission will not cure these problems.

No manufacturer makes a perfectly quiet transmission. Gear rollover noise is present in most constant mesh
transmissions and will tend to disappear when the clutch is disengaged or transmission is placed in gear. If
clutch is properly adjusted, clutch release bearing noise will disappear when release bearing is moved enough to
slide release bearing away from pressure plate.

Trouble shooting can be helped by driving vehicle on a smooth level road to help eliminate tire and body noise.
Note whether noise occurs on acceleration, coasting, deceleration or steady driving conditions. Some problems
may only occur when transmission is either hot or cold. Gear lubricant that is too thick can cause hard shifting
on cold mornings before engine is warm and vehicle has been driven.

MANUAL TRANSMISSION/TRANSAXLE TROUBLE SHOOTING

Condition

Possible Cause

Noisy In Forward Gears

Low Gear Oil Level, Loose Bellhousing Bolts, Worn

Bearings Or Gears

Clunk On Deceleration
(FWD Only)

Loose Engine Mounts, Worn Inboard CV Joints, Worn

Differential Pinion Shaft, Oversized Side Gear Hub

Counterbore in Case

Gear Clash When Shifting
Forward Gears

Clutch Out Of Alignment, Shift Linkage Damaged Or Out

Of Adjustment, Gears Or Synchronizers Damaged, Low

Gear Oil Level

Transmission Noisy When
Moving (RWD Only);
Quiet In Neutral With
Clutch Engaged

Worn Rear Output Shaft Bearing

Gear Rattle

Worn Bearings, Worn Gear Oil, Low Gear Oil, Worn Gears

Steady Ticking At Idle
(Increases With RPM)

Broken Tooth On A Gear

Gear Clash When Shifting
Forward Gears

Worn Or Broken Synchronizers, Faulty Clutch

Loud Whine In Reverse

Normal Condition

(1)

Noise When Stepping On

Faulty Release Bearing, Worn Pilot Bearing

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Manual Transmission Trouble Shooting

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Manual Transmission Trouble Shooting

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