pro comp 57289 - Page 7

57289
REVISED
2.1.06
7
ing bracket between the bolt holes for differ-
ential clearance. See ILLUSTRATION 2.
4) Remove eccentric bolts (front and
rear) on front lower a-arm.
5) Install the 4 a-arm drop brackets into
OEM brackets. Use new 5/8” x 4-1/2” hex
bolts and 5/8” lock nuts, placing the a-arm
drop bracket locating spacers on the outside.
NOTE: Locating spacers will go in only
one way and all 8 spacers are the same.
Reinstall front crossmember with OEM bolts.
Hand tighten bolts until brackets are aligned.
See ILLUSTRATION 3.
6) Using a straight edge, line up bottom
bracket tabs with upper OEM tabs. Then
tighten bolts. Torque to 100 ft./lbs. (Not
crossmember bolts yet). Install OEM bolts
and nut into front crossmember to front dif-
ferential. Tighten bolts and then tighten
crossmember bolts.
7) Install new rear crossmember using
7/16” x 1” bolts, 7/16” flat washers and ny-
loc nuts. Torque to 45 ft./lbs. Using a
straight edge, align upper tabs with lower
tabs and tighten bolts. Torque to 100 ft./lbs.
See ILLUSTRATION 4.
8) Install lower a-arms into lower a-arm
brackets. Reinstall OEM eccentric bolts with
hole in OEM cam washers at bottom. Install
OEM nuts and tighten nuts. NOTE:
Tighten nut, not bolt because cam will not
turn inside of tabs. Torque to 103 ft./lbs.
Refer back to ILLUSTRATION 3, if neces-
sary.
9) Lower differential (keep steady so not
to pull out front driveshaft). Install center dif-
ferential bracket (90-1277) at rear of front
differential as shown in ILLUSTRATION 5.
a) Install the 1/4” spacer tube at rear
lower mounting between differential and
EXISTING
SPACER
90-2136
HEX BOLT,
1/2” X 2-1/4”
LG.
HEX BOLT,
1/2” X 2-1/2”
LG.
FLAT
WASHER,
1/2”
SPACER
90-2022
CENTER
DIFFERENTIAL
BRACKET 90-1277
SPACER
90-2014
NYLOC
NUT, 1/2”
F
R
O
N
T
O
F
V
E
H
I
C
L
E
ILLUSTRATION 5
F
R
O
N
T
O
F
V
E
H
I
C
L
E
HEX BOLT,
1/2” X 1-
1/4” LG.
PASSENGER SIDE
DIFFERENTIAL
DROP BRACKET
90-1282
NYLOC
NUT, 1/2”
FLAT
WASHER
, 1/2”
EXISTING OEM
BOLT
(USE LOCTITE)
ILLUSTRATION 6