Page 815 - 2021-22 Auto Performance_Circle Track

Closed-Tube Rear Axle Assemblies
“Sprint Center” Quick Change

tubes, differentials, and gear covers. All 10" dia. ring gear, 12-bolt rears include the Posi-Lock assembly (WIN8104), pinion nose roller bearing (WIN8143), 31-spline aluminum spool (WIN8115), and 4.86 ring and pinion assembly. “Sprint Centers” are stocked in Wide 5,
2" (Howe, PCR), and 2-1/2" (Winters, AFCO) Grand National styles. For special order options, see the listing below or a complete breakdown of component parts on the
following page.
Part No. Description
2-1/2" Grand National Quick Change Kits
Closed-tube kits include solid axles, Platinum 5 x 5" 4140 heat- treated steel hubs (WIN2255C-P), and 11.75" dia. x .810" thick ro- tors. Each 10" dia., 12-bolt rear has a magnesium center with 6-rib bells (WIN8186P), Posi-Lock assembly (WIN8104), pinion nose roller bearing (WIN8143), 31-spline aluminum spool (WIN8115), and 4.86 ring and pinion assembly. For special order options, see the listing below or consult the complete breakdown of component parts on the following page.
Part No. Description
* Signifies IMCA-legal. ** Assemblies do not include axles.
Options for “Sprint Center” and Grand National Quick-Change
Part No. Description Part No.
Included Options
Axles
Housing Width
WINK5063-60-2K-P
Wide 5 Quick Change with 4.86 Ring and Pinion
WINK5270-A6
Aluminum Tube, Standard Dirt/Mastersbilt Rear
WIN8106, WIN8133, WIN8137, WIN8140, WIN8186P
33"/35"
61-5/8"
WINK5270-LT
Less Axle Tubes
WIN8106, WIN8133, WIN8137, WIN8186P
N/A
N/A
Included Options
Description
Axles
Housing Width
WINK5063-60C**
Steel Tube, Centered Modified Rear, AFCO/Winters
WIN8106, WIN8131, WIN8133, WIN8143
30.5"/30.5"
60"
WINK5063-60-2-6**
Steel Tube, 2" Offset Modified Rear
WIN8106, WIN8131, WIN8133-10-6, WIN8155PMHD,WIN8208, WIN8265-156, WIN9116
32.5"/28.5"
60"
WINK5063-60-2K-P*
Steel Tube, 2" Offset Modified Rear
WIN8106, WIN8131, WIN8133
32.5"/28.5"
60"
WINK5063-60CK-P*
Steel Tube, Centered Modified Rear
WIN8106, WIN8131, WIN8133
30.5"/30.5"
60"
Part No.
Description
WIN8136P
4-Rib Lightweight Side Bell with Inspect. Plug
WIN8137
Heavy-Duty Gear Cover
WIN8138
Alum. Tubes with Steel Spindle
WIN8139
8-Bolt Spindles
WIN8140
Alum. Side Tubes
WIN8143
Roller Brg. On Pinion Nose
WIN8151
Steel Swedged Wide 5 Tubes
WIN8152
Titanium Lower Shaft
WIN8154
Closed Drive
WIN8155P
8-Rib Side Bell with Inspection Plug
WIN8155PMHD
8-Rib Bell W/Inspection Plug
WIN8162
Super Cover with Pump
WIN8171
Billet Aluminum Locker
WIN8183
“Triple Track” Differential
WIN8100
Gear Cover with Roller Brgs.
WIN8102
Super Gear Cover
WIN8104
Posi-Lock Assembly
WIN8106
Heat-Treated Lower Shaft
WIN8111
4.11 Ratio Ring and Pinion
WIN8114
Superlight Steel Spool
WIN8115
Aluminum Spool
WIN8117
Magnesium Side Bells
WIN8130
Ultralight Aluminum Spool
WIN8131
Machined Side Tubes
WIN8132
Alum. 8-Bolt Side Tubes
WIN8133
“Sprint Center”
WIN8133-10-6
Sprint Center with 6-Bolt Rear Cover
WIN8136
4-Rib Lightweight Side Bell
WIN8186P
6-Rib Mach. Side Bell with Inspection Plug
WIN8201
Tube Seal
WIN8202-XXX
EDM Ring and Pinion (XXX-Specify Ratio)
WIN8208
Thermal Dispersant Coating
WIN8218-RP
REM Ring and Pinion
WIN8244C-CT
Differential Bearings, Low-Drag Ceramic
WIN8244C-P
Pinion Bearings, Low-Drag Ceramic
WIN8244S-CT
Differential Bearings, Low-Drag Steel
WIN8244S-P
Pinion Bearings, Low-Drag Steel
WIN8265-156
Tube Option .156" Wall
WIN9116
Pinion Plate Delete
Note: A complete exploded view and breakdown of all component parts can be seen on the following page.
MATT FRAZIER
JEFF BOZELL
TRACK
CIRCLE 2021-22
JIM DENHAMER
813