Mazda MX-5 NA silhouetteMX-5 NA

DIFFERENTIAL

M-38prose procedure
Continued from M-37

Pinion height measurement

  1. 7
    Place the SST on the surface plate and set the dial indicator to "Zero".
    Illustration showing SST 49 0727 570 being placed on a surface plate with a dial indicator being set to zero.
    69G09X-172
  2. 8
    Place the SST atop the drive pinion model. Set the gauge body atop the gauge block.
    Illustration showing SST 49 N027 001 placed atop the drive pinion model with the gauge body atop the gauge block, and the dial indicator feeler measuring at the bearing inner race (side bearing) seat positions on the left and right.
    05U0MX-102
  3. 9
    Place the feeler of the dial indicator so that it contacts where the bearing inner race (side bearing) is installed in the carrier. Measure the lowest position on the left and right sides of the carrier.
  4. 10
    Add the two (left and right) values obtained in Step 9 and divide the total by 2.
    Illustration showing the drive-pinion gauge model marked with the drive pinion specification: a + symbol above and a − symbol below indicating that the marking on the drive pinion can be plus or minus.
    05U0MX-103
Specificationaverage of left/right measurements
0 (0)mm (in)

Spacer selection

  1. 11
    If not within specification, adjust the pinion height by selection of a spacer.
    Spacers are available in increments of 0.03mm. Select the spacer thickness that is closest to that necessary.
    Spacer-thickness reference table (label only — content rendered as content_blocks.table).
    05U0MX-104

Spacer mark vs. thickness

08
Thickness3.08 mm (0.1213 in)
11
Thickness3.11 mm (0.1224 in)
14
Thickness3.14 mm (0.1224 in)
17
Thickness3.17 mm (0.1248 in)
20
Thickness3.20 mm (0.1260 in)
23
Thickness3.23 mm (0.1271 in)
26
Thickness3.26 mm (0.1283 in)
29
Thickness3.29 mm (0.1295 in)
32
Thickness3.32 mm (0.1307 in)
35
Thickness3.35 mm (0.1319 in)
38
Thickness3.38 mm (0.1331 in)
41
Thickness3.41 mm (0.1343 in)
44
Thickness3.44 mm (0.1354 in)
47
Thickness3.47 mm (0.1366 in)

Adjustment of drive pinion preload

  1. 1
    Install the spacer.
    Press on until the force required suddenly increases.
    Install the spacer selected for the pinion height adjustment, being careful that the installation direction is correct.
    Illustration showing SST 49 F401 331 and SST 49 F401 336B being used to press on the bearing inner race (rear bearing); a callout labelled SPACER points to the spacer being installed beneath the bearing.
    05U0MX-105
  2. 2
    Press the bearing inner race (rear bearing) on with the SST.
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