Tires - Size Recommendations

Number 84-3-4 Date 1/84
Subject: USE OF NON-ORIGINAL SIZE TIRES ON 1984 PONTIACS EQUIPPED WITH 1.8L or 2.5L ENGINES AND MANUAL TRANSMISSIONS
As in the past, when tire sizes not recommended are used, the speedometer and odometer calibrations will be affected because these parts are calibrated to meet the original equipment tire sizes. On 1984 models with 1.8L or 2.5L engines and manual transmissions, the calibration of the shift light will also be affected.

Any time a non-recommended size tire is used, the customer should satisfy himself that tire clearance to the body will be sufficient, and should replace the speedo driven gear to correct speedometer and shift light calibration.