GM Service Manual Online
For 1990-2009 cars only

Noise In All Ranges

Checks

Cause

Sun Gear To Planetary Gears

Excessive backlash

Planetary Carrier Lock Plate

Loose

Thrust Bearing

Defective

Bearing Bushings

Worn

Transmission End Play

Excessive

Governor Hub Parking Pawl Spring Contacts

Unhooked

Converter Balancing Weights

Loose

Converter Housing Attaching Bolt

Loose/contacting converter