High Horse Performance, Inc.Answer
Jan 08, 2022 - 06:57 AM
These differentials are 38 tooth at the axle spline which is factory for Scatpack's and SRT8's, including Hellcats and RedEye's. The R/T's don't always have the 38 tooth count so you may need to replace additional parts, such as axles, in order to fit this differential. And tuning wise, because the 8-Speed transmissions use an output speed sensor on the transmission to determine vehicle speed you do not need to tune the transmission for a gear change - it compensates on it's own with no issues.
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