|
AREA |
PART |
POSSIBLE
PROBLEM |
|
Body |
Loose Body
Mounts |
|
|
Body |
Rusted Body
Mounts/Brackets |
Check #4 First
TracyPerf©98 |
|
|
Brakes |
Rotors |
Out of Round,
Wobbling, Cracked Fins |
|
Brakes |
Calipers |
Loose Caliper
Bolts |
|
|
Clutch |
Pilot Bushing |
Loose, Worn
TracyPerf©98 |
|
Clutch |
Flywheel |
Out of Balance |
|
Clutch |
Flywheel |
Out of
Balance, Surfaced too much, Loose, No Dowel Pin |
|
Clutch |
Clutch
Pressure Plate |
Plate Off
Center, Out of Balance, Bent Housing |
|
Clutch |
Clutch Disk |
Out of Round,
Dropped, Out of Balance |
|
Clutch |
Bellhousings |
Cracked or
Hole not Concentric to Crankshaft |
|
Clutch |
Bellhousings |
Wrong Size
Hole for Trans Collar |
|
|
Engine |
Water Pump
Shaft |
Bent, Loose
Bearing TracyPerf©98 |
|
Engine |
Fan Clutch |
Loose, Bad |
|
Engine |
Fan Blade |
Bent, Out of
Balance |
|
Engine |
Balancer |
Loose, Spun on
Rubber, Bad Keys |
|
Engine |
Motor Mounts |
Cracked |
|
Engine |
Tune-up |
Misfiring |
|
Engine |
Carb |
Misfiring
TracyPerf©98 |
|
Engine |
Crankshaft
Rear Flange |
Bent, Loose
Flywheel Bolts, Worn Dowel Pin |
|
|
Frame |
Cracked Bent
or Rusted Frame or Crossmembers |
|
|
Frame |
Cracked Front
Frame Supports, Extensions |
|
|
Frame |
Loose Bumper
Brackets, Bumpers, Impact Bars |
|
|
|
Rear Axle |
Spindles |
Loose or
Improperly Shimmed Bearings, Bent Spindle, Bent Studs |
|
Rear Axle |
Flanges |
Bent Flange or
Loose Bolts TracyPerf©98 |
|
Rear Axle |
Flanges, Half
Shafts |
Wrong
Combination, Wrong Alignment |
|
Rear Axle |
Half Shafts |
Bent, Out of
Balance, Loose U-Joint Holes |
|
Rear Axle |
U-Joints |
Not Seated
Properly, Off Center, Wrong Caps, Clips Missing |
|
Rear Axle |
Axle Yokes |
Bent, Not
Seated U-Joints, Not Machined Correctly, Loose Bolts |
|
Rear Axle |
Pinion Flange |
Bent, Machined
Wrong, Loose Bolts |
|
Rear Axle |
Pinion Snubber
Bushings |
Loose or Worn
Out Cushions or Loose Bolt |
|
Rear Axle |
Pinion Snubber
Bracket |
Slotted
Bracket Holes or Loose Bolts |
|
|
Steering |
Wheel Bearings |
Loose or Bad
Bearings TracyPerf©98 |
|
Steering |
Steering
Gearbox |
Loose
Internally or Loose from Frame |
|
Steering |
Frame at
Gearbox |
Check for
Cracks |
|
Steering |
Steering
Column |
Loose, Bent |
|
Steering |
Steering Rag
Joint |
Loose, Worn
Out |
|
Steering |
Tie Rod Ends |
Loose or
Indexed Wrong |
|
Steering |
Idler Arm |
Loose at
Bearing or Frame |
|
Steering |
Pitman Arm |
Loose or
Oblong Hole TracyPerf©98 |
|
Steering |
Power Steering
Valve |
Loose Ball,
Not Properly Screwed onto Relay Rod |
|
Steering |
Manual
Steering Relay Rod |
Bent Rod or
Loose Ball Stud |
|
Steering |
Relay Rod |
Bent Rod or
Loose Tie Rods or Oblong Holes |
|
|
Suspension |
Front Spindles |
Bent Spindles
or Loose Bolts on Steering Arms, Oblong Holes |
|
Suspension |
A-Frames,
Shafts, Bushings |
Bent A-Frames
or Shafts, Loose Bushings, Missing Bolts |
|
Suspension |
Ball Joints |
Loose, Not
Lubricated, Not Riveted or Bolted Properly |
|
Suspension |
Shocks |
Worn, Loose,
Leaking, Bolt or Grommets Missing TracyPerf©98 |
|
|
Transmission |
Trans Input
Shaft |
Bent TracyPerf©98 |
|
Transmission |
Trans Output
Shaft |
Bent |
|
Transmission |
Trans
Tailhousing Bushing |
Worn |
|
Transmission |
Trans Mounts |
Cracked |
|
Transmission |
Trans Yoke |
Worn |
|
Transmission |
Driveshaft |
Bent, Out of
Balance, Balance Weight Missing |
|
|
Wheels/Tires |
Hubcaps |
Heavy Wire
Style Hubcaps May Effect Balance |
|
Wheels/Tires |
Wheels |
Bent, Loose
Lug Nuts, Wheel Adapters |
|
Wheels/Tires |
Tires |
Bad, Out of
Round, Out of Balance, Broken Cords |
|
|
Test Drive |
Check at what
speed vibration comes in TracyPerf©98 |
|
|
Test Drive |
Check whether
it is MPH of RPM related |
|
|
Test Drive |
Check whether
it goes away with clutch disengaged |
|
|
Test Drive |
Get up to
speed where vibration is the greatest, Then: |
|
|
|
Diagnosis |
Disengage
Clutch, Does Vibration Go Away? TracyPerf©98 |
|
|
Diagnosis |
With Clutch
Disengaged, Rev Motor Up & Down |
|
|
Diagnosis |
Does the
Vibration Relate to Engine or Road Speed |
|
|
Diagnosis |
With Car
Sitting Still, Rev Up Engine to Check for Vibration |
|
|
Diagnosis |
Short Out
Cylinders to See if Vibration is Related to One Cylinder |
|
|
Diagnosis |
Disconnect All
Belts to Eliminate Front Engine Accessories |
|
|
Diagnosis |
Install a
Different Set of Wheels and Tires to Eliminate Them |
|
|
Diagnosis |
Run the
Vehicle on the Hoist with Jack Stands at Rear to Load Suspension Properly |
|
|
Diagnosis |
Spin Balance
Wheels on Vehicle |
|
|
Diagnosis |
Hoist Testing
will Eliminate Front Suspension, Steering, and Road Vibration Problems |
|
|
Diagnosis |
Using a
Stethoscope or Wooden Dowel on Components will Amplify Noises and Vibrations TracyPerf©98 |
|
|
|
Notes: |
Clutch &
Flywheel Problems Tend to Be Felt at around 1800 and 3600 RPM |
|
|
Notes: |
Tire Balance
Problems Tend to Get Worse With Speed TracyPerf©98 |
|
|
Notes: |
Front End
Problems Can Come and Go With Different Speeds. They Plane Out Sometimes |
|
|
Notes: |
Front End
Problems Tend to be Felt in the Steering Column |
|
|
Notes: |
Clutch,
Flywheel, and Trans Problems Tend to be Felt in the Shifter |
|
|
Notes: |
Rear End
Problems Tend to be Felt in the Seat Bottom TracyPerf©98 |
|
|
Notes: |
Body, Frame
and Bumper Problems Tend to be Felt in Body Vibrations |
|
|
Notes: |
Vibrations
Tend to Come From Items With Great Mass at a Great Distance from Centerline |
|
|
Example: |
You Can Get a
Vibration from a Tire, But You Wouldn't Get One From a Spindle Nut TracyPerf©98 |
|
