First, Ford argues Plaintiffs do not define the Suspension Defect, and their engineering expert, Peter Leiss, testified no objective criteria exists to identify whether a Class Vehicle has a defect related to oscillation. (
Id. (citing Deposition of Peter Leiss (“Leiss Depo.”), Doc. No. 142-41, at 50–51 (stating he does not believe there is “one kind of objective criteria you could give to someone” to determine “this is where a vehicle that is susceptible to shimmy ... actually has a shimmy defect”)).) Indeed, Mr. Leiss stated that kinematics, compliance, vehicle architecture, and field performance “are all pieces of the puzzle” that are considered in an “assessment as to whether a vehicle that is susceptible to shimmy crosses the line and becomes defective[.]” (Leiss Depo. at 50.) Additionally, Ford contends the vehicle design and its manufactured components, including the steering damper, changed greatly over the fifteen model years at issue. (Doc. No. 136 at 25.) Mr. Leiss testified that while the purported defect is the general “front suspension” design of the Class Vehicles, he acknowledges the front suspensions, including geometry, kinematics, frame, damper, and caster angle, are not the same across the Class Vehicles. (
Id.;
see Leiss Depo. at 6, 11, 24–26, 27, 28–29, 30–31, 49–51; Leiss Report ¶ 27.) Even within a platform, differences exist in geometry and kinematics, including caster angle, whether the vehicle has a short or long wheel base, whether it has a heavy-duty package, and whether it has a single or dual rear wheel. (Doc. No. 136 at 25–26;
see Expert Report by Robert Pascarella (“Pascarella Report”), Doc. No. 142-2, ¶ 35; Leiss Depo. at 11, 12–15.) Further, Mr. Leiss testified that while the caster settings for every Class Vehicle within the four generations were within the same range, each Class Vehicle would not be built with the same caster angle. (Leiss Depo. at 10–11.) Thus, those Class Vehicles that have lower caster settings within the acceptable range are less susceptible than those that have higher caster settings. (
Id. at 12–13.) Ford contends Plaintiffs offer no standard for quantifying a “sufficient” amount of damping, nor do they describe how “insufficient” damping can be determined with classwide evidence. (Doc. No. 136 at 26.)