Wilwood Forged Narrow Superlite 4R Big Brake Rear Parking Brake Kit - Manual (Page 3)

Installation of this kit should ONLY be performed by persons experienced in the
installation and proper operation of disc brake systems.
Before assembling the
Wilwood rear axle disc brake kit, double check the following items to ensure a trouble-
free installation.
•Make sure this is the correct kit to fit the axle housing flange, not necessarily the rear
end make. Many times after market manufacturers put a different make of axle
housing flange on the stock rear end housing (see Figure 6). Example; Big Ford rear
ends with Olds-Pontiac flanges, therefore, an Olds-Pontiac rear disc brake kit would
be the correct kit to order. Also, shock clearance may be a problem. They may have
to be modified and/or relocated to clear the Wilwood kit after final assembly.
•Inspect the package contents against the parts list to ensure that all components and
hardware are included.
•Verify The Following Measurements Before Assembly.
• Bearing outside diameter.
• Axle housing flange mounting pattern to pattern in bracket.
• Stud pattern on axle flange to stud pattern in hat.
• Axle center register diameter is 2.80”, Figure 3. This kit uses Wilwood’s
removable center register adapters. Rotors can either be centered on the axle
register, i.e. register-centric or centered on the wheel studs, i.e. stud-centric.
Due to variations in wheel stud final diameters, register-centric centering can be
a more accurate method of centering the rotor to the axle. Wilwood offers
various diameter adapters for purchase in addition to the ones supplied in this
kit, see Table 1.
Figure 2. Wheel Clearance Diagram
CENTER
LINE OF
WHEEL
.50 (12,7)
RADIUS .20 (5,1)
3.60 (91,4)
4.94
(125,5)
7.92
(201,2)
.29
(7,4)
CALIPER
WILWOOD ROTOR
WHEEL MOUNT SURFACE
NOTE: A MINIMUM OF .080” CLEARANCE MUST BE MAINTAINED
BETWEEN THE WHEEL AND CALIPER IN ALL AREAS
1.10 (27,9) ROTOR THICKNESS
2.81 (71,3)
CENTER REGISTRATION
Parts List
General Information
1
2
3
4
4A
5
6
7
8
9
10
11
12
13
14
14A
14B
15
16
17
18
19
1
2
2
2
2
24
24
2
6
16
18
1
12
2
2
2
2
4
4
4
4
2
249-7463/64
250-11223
170-9492
160-8402/03
160-8400/01
240-11240
230-6738
249-9495/96
230-6318
240-1159
240-10191
150-8855K
240-9609
300-9503
120-11782-BK
120-8062-RP/LP
120-11782-RD
230-9183
240-10190
230-9079
300-7392
300-11337 Bracket Kit (pair, one each, left and right)
Retainer, Bearing
Hat, 5 x 4.50/4.75/5.00, 1.54 offset, 12 x 8.75 Bolt Circle
Rotor, GT 1.10” Thk x 14.00” Dia, 12 x 8.75” Bolt Circle, Right & Left
Rotor, SRP Drilled and Slotted
Washer, .265 I.D. x .500 O.D. x .063 Thick
Bolt, 1/4-28 x .75 Long, 12 Point
Bracket Caliper Mounting (pair, one each, left and right)
Bolt, 5/16-24 x 1.75 Long, SHCS
Shim, .035 Thick
Washer, .328 I.D. x .562 O.D. x .063 Thick
Pad, BP-10 Compound, Axle Set
Shim, .015 Thick
Spacer, Caliper Bracket
Caliper, Superlite 4R
Caliper, Superlite 4R, Polished
Caliper, Superlite 4R, Red
Nut, 3/8-24 Self-Locking, 12 Point
Washer, .391 I.D. x .625 O.D. x.063 Thick
Stud, 3/8-16 x 3/8-24 x 3.15 Long (pre installed in bracket)
Spacer, .573 Long
Adapter, Rotor Registration
ITEM NO. PART NO. DESCRIPTION QTY
NOTES: Part Number 250-11223 is included with the bracket kit assembly 249-7463/64
P/N 230-8217 Rotor Bolt Kit, includes part numbers 230-6738 and 240-11240
P/N 249-9633L/R Caliper Bracket Mounting Bolt Kit, includes P/N’s 230-9183, 230-9079, 240-1159, 240-10190, 249-9495/96 & 300-7392
P/N 300-9738 Spacer Kit, includes part numbers 230-6318, 240-10191, 240-9609 and 300-9503
Item 4A is an optional item and included with the “-D” kits. Add ”-D” to end of part number when ordering.
Item 14A is an optional item and included with the “-P” kits. Add “-P” to end of part number when ordering.
Item 14B is an optional item and included with the “-R” kits. Add “-R” to end of part number when ordering.
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