1986 Jeep CJ Models Ring and Pinion Set CJ7 - 4WD - Dana 30 - Standard Rotation - 3.90 Ratio - w/o Crush Sleeve - Front guaranteed to replace your current 1986 Jeep CJ Models Ring and Pinion Set CJ7 - 4WD - Dana 30 - Standard Rotation - 3.90 Ratio - w/o Crush Sleeve - Front. 1986 Jeep CJ Models Ring and Pinion Set comes new OEM 1986 Jeep CJ Models Ring and Pinion Set aftermarket new 1986 Jeep CJ Models Ring and Pinion Set of remanufactured 1986 Jeep CJ Models Ring and Pinion Set CJ7 - 4WD - Dana 30 - Standard Rotation - 3.90 Ratio - w/o Crush Sleeve - Front.