Power Train Disassembly & Assembly
2. Look at the pinion cone (“pc”) variation number on
the old drive pinion that is being replaced. Record
the number for later use. If (“pc”) variation number
cannot be located, assemble gear set with shim
pack thickness found in step 1.
NOTE : The pinion cone number can be either
100ths of a millimeter or 1,000ths of an inch. Refer to
the following example.
PC +3, PC -3, +3 or -3 = 0.003 inch
PC +.03, PC -0.03 mm, +0.03 mm or -0.03 =0.03 mm
To change millimeters to inches – millimeters x 0.039
To change inches to millimeters – inches x 25.40
3. If the old pinion cone (PC) number is a plus (+)
mumber, subtract the number from the old shim
pack thickness that was measured in step 2.
4. If the old pinion cone (PC) number is a minus (-)
number, add the number to the old shim pack
thickness that was measured in step 2.
NOTE : The value calculated in step 3 or 4 is the
thickness of the standard shim pack, without a
variation.
5. Look at the pinion cone (PC) variation number on
the new drive pinion that will be installed. Record
the number for later use.
6. If the new pinion cone (PC) number in a rear
differential carrier is a plus (+) number, add the
number to the standard shim pack thickness that
was calculated in step 3 or 4.
7. If the new pinion cone (PC) number in a rear
differential carrier is a minus (-) number, subtract
the number from the standard shim pack thickness
that was calculated in step 3 or 4.
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