Nitro Ring & Pinion 489 8.75" 4.30 Ratio

Sale Price $327.00 Price $363.33 you save: $36.33 (10%)
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Chrysler 8.75" 489 Drop-Out Housing 4.30 Nitro Ring & Pinion

Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford & Toyota. They are precision machined using computer controlled processes, heat treated, CNC triple-lapped and Rockwell tested for hardness. These extra steps ensure excellent fitment, ideal contact pattern and smooth, quiet operation.


Differential: Chrysler 8.75", 489

Gear Ratio: 4.30

Tooth Count: 43/10

Pinion Splines: 29, Fine

Ring Gear Bolts: 12 (not included)

Manufacturer: Nitro Gear & Axle

Warranty: 2 Years


1960-1974 A Bodies

1970-1974 Plymouth Duster

1960-1974 Plymouth Valiant

1961-1962 Dodge Lancer

1964-1974 Plymouth Barracuda

1963-1974 Dodge Dart

1969-1974 Dodge Dart Swinger

1963-1966 Dodge Dart Wagon

1971-1972 Dodge Demon

1962-1974 B Bodies

1962-1964 Plymouth Savoy

1968-1974 Plymouth Roadrunner

1965-1974 Plymouth Satellite

1970 Plymouth Superbird

1962-1964 Plymouth Fury

1965-1970 Plymouth Belvedere

1967-1971 Plymouth GTX

1966-1974 Dodge Charger

1965-1974 Dodge Coronet

1962-1964 Dodge Polara

1969 Dodge Charger Daytona

1968-1971 Dodge Super Bee

1965-1974 C Bodies

1965-1974 Plymouth Fury

1972-1974 Plymouth Scamp

1966-1969 Plymouth VIP

1965-1974 Chrysler 300

1965-1974 Dodge Polara

1965-1974 Dodge Monaco

1965-1974 Chrysler Newport

1965-1974 Chrysler New Yorker

1967-1974 Chrysler Imperial

1957-1966 Chrysler Imperial

D Body

1970-1974 E Bodies

1970-1974 Plymouth Barracuda

1970-1974 Dodge Challenger

1971-1974 B100 & B200 Vans

1957-1974 D100 & W100 1/2 Ton Pickups

1964-1974 A100 Trucks & Vans

1967-1974 A108 Trucks & Vans


*All Nitro Gear & Axle brand products are warrantied to be free of manufacturer defects for the specified period. Warranty requests must be made by the original purchaser and submitted by the dealer purchased from. Any parts sent for warranty consideration must be pre-approved and shipped prepaid freight to our facility with copy of RGA for our inspection & determination. We will not pay for labor, shipping cost, loss of revenue or perishable goods, commercial losses, costs of telephone calls, shipping or general inconvenience. This is our only warranty expressed or implied. Unauthorized warranty returns may be refused. Warranty generally covers MFG defects in material or workmanship. Abuse, overloading, improper lubrication, misuse, commercial or competition use voids warranty. Normal characteristics are not warrantable, such as Gear whine. Minor cosmetic flaws, dings, burrs from shipping or manufacturing, are not considered defect, it is installer responsibility to address these at time of install. Customer is responsible for shipping charges if warranty is granted. Warranty is for the original purchaser/user, is not transferable. Warranty covers one replacement or credit solely at our discretion. Warranty determinations are at our sole discretion.

In addition to the above conditions, see special notes for these products:

Ring & Pinion - Warrantied against manufacturing defects. 2 years from date of purchase. Must provide set-up specs.

Chromoly front Axles, Excalibur Joints, 30/30 Birfield kits - Warrantied against manufacturing defects for the life of the vehicle. These products are also covered for Breakage. The Shaft / joint must be BROKEN. Wear, twisting, bending are not warrantable. Damages caused by failure of other parts are not warrantable, for example broken U-joint (other than Nitro Excalibur) causing damage to Axle ears.

Rear Chromoly Axles - Warrantied against manufacturing defects for 5 years. These products are also covered for Breakage. The Shaft must be BROKEN. Worn, twisted, or bent axles are not warrantable.


This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to:


Box Weight: 16 lb

Box Dimensions: 1 x 1 x 1 in

Shopper Approved Review

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