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47
NZD $11,631.71 47 items

Subtotal: NZD $11,631.71

View cartCheckout

47
NZD $11,631.71 47 items

Subtotal: NZD $11,631.71

View cartCheckout

Diff Head 9" 3.89 Gear Ratio

NZD $3,104.89

SKU: 4203 Category:

2 in stock

A Ford 9-inch “diff head” or third member with a 3.89 gear ratio provides good off-the-line acceleration for street and track use.
This ratio can lead to higher engine RPMs at cruising speeds compared to numerically lower ratios.
The 9-inch is a popular axle due to its strength and ease of service, though high-horsepower applications benefit from aftermarket nodular cases and stronger axles. 
Complete 9-inch third members with 3.89 ratio
These assemblies include the differential, ring and pinion gears, case, and yoke, and are built and set up by experienced technicians.

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