Mazda RX-8 Manual page 1411

7. Align the bearing cap alignment marks, assemble the bearing cap, and then temporarily tighten the bolts.
8. Install the dial gauge with the measuring probe of the dial gauge attached perpendicularly to the end of
one of the ring gear teeth.
9. Secure the drive pinion and measure the backlash of the ring gear.
Backlash
Standard: 0.09    0.11 mm {0.0035    0.0043 in}
o
Minimum value: 0.05 mm {0.0020 in} or more
o
Variance: 0.07 mm {0.0028 in} or less
o
NOTE:
Measure the backlash at 4 locations around the ring gear. Make sure all of the 4 locations are
•
within specification, and the minimum value for the 4 locations is 0.05 mm {0.0020in} or more
and the variance is 0.07 mm {0.0028 in} or less
10. If the backlash is not within the specification, adjust the gear case component by moving it in the axial
direction.
NOTE:
(w) RX-8 Power Train
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