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Differential Bearings
If you are installing a new differential or replacing the bearings on the old diff, you will need to press on new bearings.
Removing the bearings is straightforward - just use an appropriately sized bearing puller. I used one from Harbor Freight to pull a bearing from an RX-8 diff so the race could be used as a drift to seat bearing on the new diff.
The bearings can easily be pressed on in a press using a bearing driver. This will not completely seat the bearing however. After the bearing is pressed on you can see a small gap between the bearing and the body of the diff. The bearing must be pressed on until it reaches the body of the diff.
Mazda makes a SST (Special Service Tool) for this. If you don't have the proper Mazda SST the next best thing is a bearing race. This is where the race I removed from the RX-8 diff came into play. As seen in the attached pic, the bearing race can be used in the press to finish pressing the bearing on the last few thousandths of an inch.
Next: Differential measurements
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