Revolution Gear & Axle D30-373R 3.73 Ratio Ring & Pinion for Dana 30 Front Axle

Vehicle Fitment

• 1966-1986 Jeep CJ (All Engines) 4WD
• Fitment confirmed for Dana 30 front axle
• Fitment beyond 1986 and into 2025 is unconfirmed at time of listing

Features

• 3.73 gear ratio provides balanced performance and drivability
• Reverse rotation configuration for front Dana 30 axles
• Constructed from durable 8620 heat-treated steel
• Precision gear-cutting for smooth operation and reduced noise
• Compatible with off-road and street applications
• Direct replacement style for easy installation on compatible axles
• Supports vehicles with upgraded tires and load demands
• Reliable performance under heavy-duty use

Specifications

• Gear Ratio: 3.73:1
• Rotation: Reverse for front Dana 30 axle
• Material: 8620 heat-treated steel
• Ring Gear Diameter: 7.2 inches (approx)
• Ring Gear Bolt Thread: 10 x 3/8 inches
• Pinion Splines: 26
• Affected Axle: Dana 30 front differential

Included Components

• 1x Ring Gear
• 1x Pinion Gear
• 1x Pinion Seal
• Note: Ring gear bolts may not be included

Product Description

The Revolution Gear & Axle D30-373R ring and pinion kit is designed to enhance front axle performance for vehicles equipped with a Dana 30 differential in reverse rotation configuration. Its 3.73:1 gear ratio provides smooth drivability while maintaining torque balance for off-road and street use.

Manufactured from 8620 heat-treated steel with precision gear cutting, this kit offers long-lasting durability and quiet operation. The D30-373R is confirmed to fit Jeep CJ models from 1966-1986. Fitment beyond 1986 and for newer vehicles is unconfirmed at the time of this listing.

Installation requires disassembly of the differential, inspection of bearings and seals, and proper setting of pinion preload and gear backlash. Professional installation or experienced technicians are recommended. Matching rear-axle gear ratio is advised for optimal performance. This kit updates the front axle ratio only.