1993 Big Block Ford Mustang Rear Planetary Assembly
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The long shelf life of the TH400 means that it can benefit from revisions made to its successors. For instance, this five-pinion rear planetary assembly out of a 4L85E is substantially stronger than the TH400's four-pinion unit, as it distributes torque over a greater surface area. Note the straight-cut gears. View Related Article
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