In re Class 8 Transmission Indirect Purchaser Antitrust Litigation, 140 F. Supp. 3d 339

Indirect purchasers (buyers of new Class 8 trucks containing Eaton transmissions) sued Eaton and multiple OEM defendants alleging an anticompetitive conspiracy implemented by Eaton’s Long Term Agreements (LTAs) with OEMs that foreclosed competitor ZF Meritor and raised transmission/truck prices.
Plaintiffs sought certification of statewide indirect-purchaser classes in 11 states for harms during a class period beginning October 1, 2002.
LTAs allegedly tied lucrative rebates to OEMs’ purchase percentages and included other terms (removing rivals from databooks, limiting warranties, etc.) that advantaged Eaton.
Plaintiffs relied primarily on economist Dr. Russell Lamb to model a common overcharge and pass-through from Eaton → OEMs → dealers → end purchasers; defendants offered rebuttal expert critique and pointed to the complexity of truck pricing and distribution.
The court found numerosity, commonality, and typicality satisfied, and counsel qualified, but identified serious problems with adequacy of proposed class representatives and—critically—predominance because plaintiffs failed to show common proof of an overcharge and classwide pass-through.
Because class representatives were inadequate and the predominance requirement failed, the court denied certification and dismissed the indirect-purchaser complaint for lack of a proper Article III case or controversy.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Commonality (Rule 23(a))	A common conspiracy and market-wide effects (higher prices, less innovation) create common questions (liability, impact, duration).	N/A (defendants did not dispute commonality here).	Commonality satisfied.
Typicality (Rule 23(a))	Representatives’ claims arise from the same alleged scheme and legal theory as the class.	Representatives differ (not large fleets; indirect purchasers who didn’t negotiate with OEMs).	Typicality satisfied.
Adequacy of representatives (Rule 23(a)(4))	Proposed representatives would protect class interests; counsel is competent.	Substitutions late in litigation and potential intra-class conflicts (some class members may have benefited) undermine adequacy.	Adequacy not satisfied: court could not find representatives would fairly and adequately protect the class.
Predominance (Rule 23(b)(3)) — Overcharge & impact	Dr. Lamb’s regressions and benchmark model show Eaton’s overcharge and high pass-through to indirect purchasers (claimed ~94.2% pass-through).	Dr. Lamb’s model uses a small, nonrepresentative slice of data, omits major product lines and large OEM data, ignores rebates/SPIFFs and complex truck-price components; pass-through requires individualized proof.	Predominance failed: plaintiffs did not demonstrate that antitrust impact and damages can be proved with common evidence; class certification denied.

Eisen v. Carlisle & Jacquelin, 417 U.S. 156 (limited merits inquiry at class certification)
General Tel. Co. of the Southwest v. Falcon, 457 U.S. 147 (class determination may require probing factual issues)
Amchem Prods., Inc. v. Windsor, 521 U.S. 591 (predominance and cohesion of class)
Wal-Mart Stores, Inc. v. Dukes, 564 U.S. 338 (rigorous analysis of Rule 23 requirements)
Comcast Corp. v. Behrend, 569 U.S. 27 (damages model must measure damages tied to liability theory)
Illinois Brick Co. v. Illinois, 431 U.S. 720 (direct-purchaser rule on antitrust damages)
In re Warfarin Sodium Antitrust Litig., 391 F.3d 516 (antitrust §2 claims often raise predominating common issues)
In re Linerboard Antitrust Litig., 305 F.3d 145 (conspiracy claims can present common issues)
In re Hydrogen Peroxide Antitrust Litig., 552 F.3d 305 (rigorous analysis; impact may require individualized proof)
Marcus v. BMW of North America, LLC, 687 F.3d 583 (actual conformity with Rule 23 required)