Overview
The Motive Gear MIDD60-488XF is a front ring and pinion gear set with a 4.88 ratio for the Dana 60 Reverse front axle. It is a light duty O.E. quality replacement cut from 8620 steel.
It is intended for on-road and off-road driving. Gears of this type are used in everyday cars, trucks and vans as well.
Key features
- 4.88 gear ratio for the Dana 60 Reverse front axle
- 8620 steel construction
- CNC machining throughout the gear set
- Computer controlled heat treatment
- Light duty O.E. quality replacement design
- Suited to on-road and off-road applications
Setup and break-in
Front axle ring and pinion sets depend on accurate setup. Pinion depth, carrier preload and backlash all need to be correct before the gears carry load, and a careful installer will check the tooth contact pattern with marking compound. Gears set too tight wear quickly, while loose gears can knock and chip. The break-in period lets the new teeth seat gradually under light load.
A 4.88 ratio is a numerically higher gear set, which many drivers choose for steady pulling power at low speed. Tire size and driving style change how the gearing feels, so compare the ratio with the tires you run. If the carrier bearings show wear, replace them while the gears are out.
- Use marking compound to check the tooth contact pattern
- Replace the carrier bearings if they show wear
- Refill with fresh gear oil after the first break-in period
- Keep a record of the original ring and pinion setup
Specifications
| Brand | Motive Gear |
|---|---|
| Part number | MIDD60-488XF |
| Axle manufacturer | Dana |
| Axle location | Front |
| Axle type | Dana 60 Reverse |
| Gear ratio | 4.88 |
| Material | 8620 steel |
| Manufacturing | CNC throughout, computer controlled heat treatment |
| Fitment label | Universal Fit |
Vehicle fitment
It is made for the Dana 60 Reverse front axle at a 4.88 ratio. Match your axle type and ratio to the set before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Ring and pinion sets need a professional setup of pinion depth, carrier preload and backlash, followed by a break-in period as the new teeth seat.
What’s included
Only the ring and pinion gear set is described; no additional hardware or parts are named.
