Chevrolet Silverado / GMC Sierra. Service manual — part 1009

J 44528

Output Carrier Bearing Race Remover

J 44529

Stator Shaft Bushing Remover

J 44530

Clutch Piston Spring Compressor

J 44587

Main Shaft Holder

J 44723

Transmission/Stand Adapter Plate

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

J 45023

Control Main Filter Wrench

J 46409

Torque Converter Lifting Handles

J 47339-1

Piston Return Spring Compressor

J 47339-2

Seal Area Protector

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

2008 TRANSMISSION

Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

SYMPTOMS - AUTOMATIC TRANSMISSION

Symptom Diagnosis

Diagnostic Category

Diagnostic Information

DEFINITION: This table consists of 9 diagnostic categories that are located in the left
column. Using this column, choose the appropriate category based on the operating
conditions of the vehicle or transmission. After selecting a category, use the right column to
locate the specific symptom diagnostic information.
Fluid Diagnosis:
This category contains the following topics:

Fluid condition: appearance,
contaminants, smell, overheating

Line pressure: high or low

Fluid leaks

Refer to Transmission Fluid Check.

Refer to Oil Pressure High or Low.

Refer to Fluid Leak Diagnosis.

Refer to Oil Out the Vent.

Noise and Vibration Diagnosis:
This category contains the following topics:

Ratcheting noise

Noise: drive gear, final drive, whine,
growl, rattle, buzz, popping

Vibration

Refer to Ratcheting Noise.

Refer to Ticking Noise in Reverse.

Refer to Vibration in Reverse and
Whining Noise in Park.

Refer to Popping Noise.

Refer to Whine Noise Varying with
RPM or Fluid Pressure.

Refer to Buzz Noise or High
Frequency Rattle Sound.

Refer to Noise in Random Ranges.

Range Performance Diagnosis:
This category contains the following topics:

Drives in Neutral

No Park

No Reverse

No Drive

Refer to Drives in Neutral.

Refer to No Park.

Refer to No Reverse or Slips in
Reverse.

Refer to No Drive in All Ranges.

Refer to No Drive in Drive Range.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

No engine braking

Shift selector indicator does not match
transmission gear range

Lack of power or hesitation

Refer to No Overrun Braking -
Manual 3-2-1.

Refer to Range Selector Displays
Incorrect Range.

Refer to Lack of Power or Hesitation.

Shift Quality (Feel) Diagnosis:
This category contains the following topic:

Harsh, soft or slipping shifts

Harsh, soft or delayed engagement

Shift shudder, flare or tie-up

Refer to Harsh Shifts.

Refer to Slipping or Harsh 1-2 Shift.

Refer to No 2-3 Shift or 2-3 Shift
Slips, Rough or Hunting.

Refer to No 3-4 Shift, Slips or Rough
3-4 Shift.

Refer to Harsh Garage Shift.

Refer to Delay in Drive and Reverse.

Refer to 3-2 Flare or Tie-Up.

Shift Pattern:
This category contains the following topics:

One forward gear only

Two forward gears only

Gear missing or slipping

No upshift or slipping upshift

No downshifts

Non-First gear start

Refer to First Gear Range Only - No
Upshift.

Refer to Third Gear Only.

Refer to Second/Third Gear Only or
First/Fourth Gears Only.

Refer to Slips in First Gear.

Refer to Slipping or Harsh 1-2 Shift.

Refer to No 2-3 Shift or 2-3 Shift
Slips, Rough or Hunting.

Refer to No 3-4 Shift, Slips or Rough
3-4 Shift.

Refer to No Part Throttle or Delayed
Downshifts.

Refer to Second Gear Start.

Shift Speed Diagnosis:
This category contains the following topic:
Inaccurate or inconsistent shift points

Refer to Inaccurate Shift Points.

Torque Converter Diagnosis:
This category contains the following topics:

Refer to Torque Converter Diagnosis.

Refer to No Torque Converter Clutch

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado