The 3.73 vs 3.91 Dilemma
jerkyboy said
Current case is a 489, is a 741 compatible?
Click to expand...
Nope.
The 741 case is a 1.375 straight pinion.
The 742 case is a 1.750 straight pinion.
The 489 case is a 1.875 tapered pinion.
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