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Here's the Jeep's original NP231 equipped with a Teraflex slip yoke eliminator kit shown next to the 4 Speed Atlas. We measured the Atlas at 15 3/8 inches and the NP231 at 16 1/2 inches from the tranny mounting surface to the rear driveshaft flange. If you need even more rear driveshaft length Advance Adapters offers the Atlas with a short tailhousing option with no speedometer provision which adds an additional 2 inches of rear driveshaft length.

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