Associated/Interchange Parts

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R&P 3.91 N400 REAR
HD Differential > Ring and Pinion > 3.91 Ratio > R&P 3.91 N400 REAR

INTERCHANGES:
REPLACES Navistar: 1665359C91
REPLACES Spicer: 401KG1018X
REPLACES Spicer: 401KG118X
REPLACES PAI: 497052
 

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Orders are delivered in 5 business days or less, with most delivered in 1-2 business days (ground service time estimates are not guaranteed).  Time sensitive and guaranteed expedited shipping options, when available, are easily displayed in your shopping cart after you enter parts and destination zip code.

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