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NOTE: The OEM Stall Speeds listed in this catalog are estimates only.
This information has been gathered from technical bulletins,
technical forums, other publications, and our own research.
FM30
DIA SPLINE PILOT HUB MTG CLUTCH
11 1/4" 21 .750"
1.610"
FLATS
4
STUDS
YES
M10 X 1.0 THREADS, 8 13/16" BOLT CIRCLE, CLUTCH TYPE UNIT
FEATURING SONNAX CLUTCH CONVERSION PLATE
ID CODE: 3PGD, 4R3P
FM51
DIA SPLINE PILOT HUB MTG CLUTCH
11" 21 .750"
1.610"
FLATS
4
STUDS
YES
9 3/16" BOLT CIRCLE, HIGH STALL
STEPPED PILOT VARIES IN LENGTH 1 5/16" - 1 7/16"
FM66
DIA SPLINE PILOT HUB MTG CLUTCH
11" 21 .750"
1.610"
FLATS
4
STUDS
YES
9 3/16" BOLT CIRCLE, HIGH STALL
STEPPED PILOT LENGTH 15/16"
ID CODE: CA, CE, DE
A4LD, 4R44, 4R55, 5R55 ALL WITH .750" PILOT CONTINUED
FM66N
DIA SPLINE PILOT HUB MTG CLUTCH
11" 21 .825"
1.610"
FLATS
4
STUDS
YES
9 3/16" BOLT CIRCLE, HIGH STALL
NON-STEPPED PILOT LENGTH 1 3/16", ID CODE:
IL5AB, IL5AC, IL5AD, YL2AB, YL2BA, 2L5AA, 4L5AD, 4L5BD
NOTE: UNITS WITH ID CODES AF, BAA, & BAB ARE MANUFACTURED BY FORD WITH MULTIPLE CLUTCH PLATE
ASSEMBLIES, CVC REPLACES THESE WITH A SINGLE PLATE ASSEMBLY FOR LONGEVITY.
FM78
DIA SPLINE PILOT HUB MTG CLUTCH
11" 21 .750"
1.610"
FLATS
4
STUDS
YES
9 3/16" BOLT CIRCLE, LOW STALL
STEPPED PILOT VARIES IN LENGTH 1 5/16" - 1 7/16"
ID CODE: AA, AF, BAA, BAB, DAA, DBA, FEA, HFB, HFC, HFD,
HKA, SDAA, 1L2AB, 1L2AC, 2L2BA, 4L2AC, YL2CA, XL2AA
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