La mayoria de los fabricantes de coronas recomiendan hacer un rodaje (Brake-in Procedure)
En este link se ve la marca que yo compre.
http://www.precisiongear.com/pgtechbreak.htm
All new ring & pinion sets require a brief break-in period in order to ensure long life and quiet operation. The following break-in procedure is recommended before applying a heavy load and/or constant usage.
1. Insure that the axle has been filled to the correct level with
proper hypoid lubricant before driving the vehicle.
The oil rating must be GL5 or higher.
2. Bring the axle to normal operating temperature by driving the
vehicle (unloaded) for approximately 15 to 20 miles. Do not
run full throttle accelerations or create any shock loads.
3. Let the axle assembly cool completely.
4. For the next 200 miles of operation, drive gently, without any
heavy loads.
5. If trailer towing is intended, an additional cycle of 200 to 300
miles of break-in is required without the trailer. This is important!
To properly break-in a new gear set, a minimum of 500 miles of
driving is essential before towing.