Table 4B

Comparison of Understeer Gradient Values
Lightly Loaded (Curb+Driver+Instrumentation) Condition vs. GVWR Condition


Test Condition Lightly Loaded Condition GVWR Condition
Test Direction
Test Vehicle and Tires* Clockwise Counter-Clockwise Clockwise Counter-Clockwise
'93 Ford Explorer 4X4 w/OEM Firestone Tires 5.09 5.16 4.58 4.95
Change from LL     -0.51 -0.21
% Change from LL     -10.02% -4.07%
         
'93 Ford Explorer XLT w/OEM Firestone Tires 3.16 3.36 2.63 2.94
Change from LL     -0.53 -0.42
% Change from LL     -16.77% -12.50%
         
'96 Ford Explorer w/Replacement Goodyear Tires 2.05 1.88 1.83 1.76
Change from LL     -0.22 -0.12
% Change from LL     -10.73% -6.38%
         
'97 Ford Explorer 4X4 w/OEM Firestone Tires 3.08 2.09 2.87 2.14
Change from LL     -0.21 0.05
% Change from LL     -6.82% 2.39%
         
'99 Ford Explorer 2-Door w/OEM Firestone Tires 1.90 1.81 2.32 1.93
Change from LL     0.42 0.12
% Change from LL     22.11% 6.63%
         
'96 Jeep Grand Cherokee w/OEM Goodyear Tires 4.18 4.65 4.65 4.93
Change from LL     0.47 0.28
% Change from LL     11.24% 6.02%
         
'92 Nissan Pathfinder w/OEM Bridgestone Tires 3.81 3.30 3.34 3.15
Change from LL     -0.47 -0.15
% Change from LL     -12.34% -4.55%

*  Unless otherwise indicated, all vehicles are 4-door, 4X2 vehicles.