26
Table 4–1. Measurements
Component or
Subassembly
Required Inspections Limits
Flywheel
Housing
Bore Diameter 16.125–16.130 in.
(409.58–409.70 mm)
Bore Eccentricity* 0.020 in. (0.51 mm) T.I.R.
Face Squareness* 0.020 in. (0.51 mm) T.I.R.
Crankshaft Hub
and/or Adapter
Converter Pilot
Diameter
1.703–1.705 in.
(43.26–43.31 mm)
Face Squareness 0.0005 in. (0.013 mm) T.I.R.**
Eccentricity
†
0.010 in. (0.25 mm) T.I.R.
Flexplate
Check for Radial
Cracks
None Permitted
Check for Elongated
Mounting Holes
None Permitted
Check for Any Signs of
Distress and/or Wear
None Permitted
Mounted
Flexplate
Axial Location Flatness
—AT 540/AT 542/
AT 545 models with
converter build date
stamp before 9/84
1.600–1.740 in.
(40.64–44.19 mm)
—AT 540/AT 542/
AT 545 models with
converter build date
stamp of 9/84
or later
1.581–1.741 in.
(40.16–44.22 mm)
—AT 543 models 1.600–1.721 in.
(40.64–43.71 mm)
—AT 1500 models 2.715–2.875 in.
(68.96–73.03 mm)
Flatness
—Formed Plates
†† 0.039 in. (0.99 mm)
—Flat Plates 0.157 in. (3.99 mm)
* Limits are for installed engines.
** T.I.R. per inch of diameter.
† Eccentricity with respect to crankshaft center of rotation.
†† A formed flexplate will not be flat, but may have raised areas at the bolt holes and/or have offset
bends in the plate.
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