Tuff Country 24814 - Ford 80-96 F150 4 performance box kit - Manual (Page 14)

62. Working on the driver side and using a pair of “C” chan-
nel vise grips, clamp the stock rear springs together. Place
one towards the front of the stock centering bolt and one
towards the rear. Special note: Make sure not to clamp the
stock over load. Repeat procedure on the passenger side.
63. Carefully remove the stock centering bolt from the stock
location and discard. Special note: Once the stock cen-
tering bolt has been removed, the stock over load will
fall out. Save the stock over load. Repeat procedure on
the passenger side.
64. Locate the new rear add-a-leafs. Also, locate the new
3/8” centering bolts and nuts from hardware bag CB38.
Working on the driver side, install the new add-a-leaf
between the stock spring and the stock overload. Secure
using the new 3/8” centering bolt and nuts. Tighten the new
centering bolt until all the springs come together and torque
to 40 ft lbs. Special note: Tuff Country does not recom-
mend using an air gun to tighten the nut all the way
down. Once the springs are starting to come together,
Tuff Country recommends using a hand wrench to finish
tightening the nut. If an air gun is used to tighten the
centering bolt all the way down, the centering bolt may
strip causing the springs to come apart. Repeat proce-
dure on the passenger side.
65. Working on the driver side and using a die grinder, care-
fully cut off the excess thread from the new centering bolt.
Repeat procedure on the passenger side.
66. Locate the stock blocks. Working on the driver side,
install the stock block into the stock location. Repeat proce-
dure on the passenger side. Carefully raise up on both
hydraulic floor jacks that are holding the rear axle until the
stock blocks make contact with the stock springs.
67. Locate (4) 9/16” x 3 1/2” x 10 1/2” round u-bolts. Locate
(8) 9/16” u-bolt high nuts and (8) 9/16” u-bolt harden wash-
ers from hardware bag 916NW. Also, locate the stock upper
u-bolt plate. Working on the driver side, secure the axle to
the stock spring using the new u-bolts, u-bolt hardware and
stock u-bolts plates. Torque to 110 ft lbs. Repeat procedure