The tires on all new production models have a tireperformance criteria (TPC) rating number molded on the sidewall.The TPC rating will appear as a 4-digit number preceded by theletters TPC-SPEC on the tire wall near the tire size. Areplacement tire should have the same TPC rating.
Tire Wear(1) | HardCornering/Underinflation |
(2) | Incorrect Alignment/Lack ofRotation |
(3) | Incorrect Alignment/Non-uniformTire |
(4) | Heavy Acceleration/Overinflation |
(5) | Wear Indicator |
Inspect the tire and wheel assemblies for the followingconditions:
Unusual wear such as cupping, flat spots, and/or heel-and-toewearThese conditions can cause tire growl, tire howl, slappingnoises, and/or vibrations throughout the vehicle.
Proper inflation to specifications for the vehicleBulges in the sidewallsDo not confuse bulges, which are an abnormal condition, withnormal ply splices which are commonly seen as indentations in thesidewall.
Bent rim flangesCrankshaft and Bearing Cleaning and Inspection Engine Block Cylinder Block Crankshaft
Special ToolsGE-7872Magnetic Base Dial Indicator SetFor equivalent regional tools, refer toSpecial Tools.Note:Use care when handling the crankshaft. Avoid damage to thebearing surfaces or the lobes of the crankshaft position reluctorring. Damage to the teeth of the crankshaft position reluctor ringm ...