Tuff Country 14955 - GM 99-05 Silverado K1500 4 kit - Manual (Page 7)

hardware. This will help you make sure that the
bracket is installed properly.
44. With the help from a buddy, carefully lift the modified
front differential back onto a pair of hydraulic floor jacks
and move the hydraulic floor jacks back underneath the
vehicle so that the newly modified front differential can be
re-installed.
45. Locate (2) 9/16” x 1 3/4” bolts, (4) 1/2” USS flat
washers and (2) 9/16” unitorque nuts from hardware bag
14955NB4. Carefully install the passenger side of the
stock front differential to the previously installed
passenger side differential drop bracket. Secure using
the new 9/16” x 1 3/4” bolts and hardware. Do not
tighten at this point and make sure to use thread
locker or lock tite.
Photo # 18
46. Working on the driver side, using a tie down strap or
bungee cord, carefully tie the driver side of the stock front
differential up and out of the way so that the new one
piece lower sub frame can be installed. Once the driver
side of the front differential is tied up and out of the way,
remove the hydraulic floor jacks from under the front
differential.
Photo # 19
47. Locate the new one piece lower sub frame and the
stock lower control arm mounting hardware that was
removed from step # 27. On the driver side, install the
front and rear part of the new one piece lower sub frame
into the stock front and rear lower control arm mounting
points using the stock hardware. Do not tighten at this
point and make sure to use thread locker or lock tite.
Repeat procedure on passenger side.
48. Carefully remove the tie down strap or the bungee
cord that is holding the driver side of the stock front
differential up and out of the way. Let the stock front
differential rest on the newly installed one piece lower
sub frame.
49. Locate the stock hardware that was removed from
step # 29. Install the rear portion of the front differential
into the tab on the rear portion of the new one piece
lower sub frame. Secure using the stock hardware. Do
not tighten at this point and make sure to use thread
locker or lock tite.
Photo # 20
50. Locate the stock hardware that was removed from
step # 36. Secure the newly installed front differential
relocation bracket to the front portion of the new one
piece lower sub frame. Secure using the stock hardware.
Do not tighten at this point and make sure to use
thread locker or lock tite.
Photo # 21
Note: If you are going to re-install the stock front
upper skid plate, please follow step #’s 51 - 53
Note: If you are not going to install the stock front
upper skid plate please skip to step # 54
51. Locate the stock front upper skid plate and the
mounting hardware that was removed from step # 3.
Secure the stock front upper skid plate to the upper stock
location using the (3) stock bolts. Do not tighten at this
point and make sure to use thread locker or lock tite.
52. Install the lower portion of the stock front skid plate
between the newly installed one piece lower sub frame
and the stock front cross member. Using a pair of
hydraulic floor jacks, carefully raise up on the front
portion on the one piece lower sub frame, and smash the
stock upper skid plate between the stock front cross
member and front portion of the newly installed one piece
sub frame.
53. Locate (2) stock upper skid plate lower bolts that
were removed from step # 3. Working on the driver side,
secure the newly installed one piece lower sub frame to
the stock front cross member using the stock hardware.
Torque to 38 ft lbs. Special note: Make sure to use
thread locker or lock tite. Also, make sure that the
bolts secure the lower portion of the stock upper skid
plate into the stock location. Repeat procedure on the
passenger side. Move back to the (3) stock upper bolts
and torque to 38 ft lbs. Carefully remove both hydraulic
floor jacks from under the front portion of the one piece
lower sub frame.
Note: If you installed the stock front upper skid plate,
please skip to step # 56
54. Using a pair of hydraulic floor jacks, carefully raise up
on the front portion on the one piece lower sub frame
until the one piece lower sub frame sits flush with the
stock front cross member.
55. Locate (2) stock upper skid plate lower bolts that
were removed from step # 3. Working on the driver side,
secure the newly installed one piece sub frame to the
stock front cross member using the stock hardware.
Torque to 38 ft lbs. Special note: Make sure to use
thread locker or lock tite. Repeat procedure on the
passenger side. Carefully remove both hydraulic floor
jacks from under the front portion of the one piece lower
sub frame.
56. Working in this order, torque the following stock and
new hardware to proper torque specifications. First, on
the driver side of the vehicle, torque the stock hardware
that connects the rear portion of the stock front
differential into the rear pocket of the new one piece
lower sub frame to 75 ft lbs. Next, working on the
passenger side, torque the stock hardware that connects
the new passenger side differential drop bracket to the
stock location to 75 ft lbs. Next, working on the
passenger side, torque the new hardware that connects
the stock front differential to the new passenger side
differential drop bracket to 85 ft lbs. Next, working on the