I believe 23k is too little also. Someone is mis-installing with perhaps too much torque on the axle nut.
– Are they using Ford OE parts ?—
Native Resource Development has a fleet of 20 Explorers for non emergency medical transportation for patients and family to get to the IHS hospitals here in the Navajo reservation. They have their own shop but yet have purchased just ONE in the last three years ( OE Ford from us ). These are the trucks with 300k+ miles on all of them. The 522,000 mile one threw our speedometer people for a loop with the odometer being un-progamable by them.
Of the other customers in our shop, the LOW mileage winner for their first hub/bearing replacement was 96,532 miles. Over the counter sales don’t have mileage documented but five others in our shop over the last two years show 144k, 129,666, 116,661, 157,166 and 265,853 miles for their first bearing.