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31-Tooth, for use with 2.84/1.55 ratio gear sets.
Must be used with 4R70W and 4R75W 2.84/1.55 gear sets with 31-tooth forward sun gear.
Use of this kit requires installation of matching Sonnax performance converter kit BW-RK-4 or BW-RK-5.
Fits Dodge units only.
Requires ‘91-later 3-4 apply ring stamped with number “7”, measuring 3.671–3.682" in height.