The quieter 9 has Motive gears with Richmond Powertrax Grip Pro differential. The noisey one came from Strange. I may go with an FN988 from DSE, essentially 8.8" gears & Truetrac differential in a 9" housing, supposedly these are dead silent.
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"If the best Mustang is the Camaro, the best Camaro is actually the Firebird" David Zenlea
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