Join Date: Feb 2011
Location: Colorado Springs, CO
I get similar questions in my career in the 4x4 industry.
The car compares wheel speeds to determine if a position is moving slower than the others, as an indicator of lock up, and releases that wheel to roll rather than skid 'move slow'. The percentage of difference is a function of the programmed algorithm in the ABS software.
Not sure in traction control factors in just front wheels, or all four.
The difference is marginally different, shouldn't be a problem, but the best bet would be to get matching of at all possible.
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