Tuff Country 14056 - GM 07-13 Silverado 1500 4wd 4 lift kit - Manual (Page 8)

22. Locate the driver side differential spacer. Locate (1) 12
mm x 35 mm socket head bolt and (1) 12 mm x 45 mm sock-
et head bolt from hardware bag 14056NB1. Install the the
new spacer to the OE bracket and secure using the new
hardware. Special note: The thicker part of the spacer
will be installed towards the front of the vehicle. Also,
the new 12 mm x 35 mm socket head bolt will be
installed towards the rear of the vehicle and the new 12
mm x 45 mm socket head bolt will be installed towards
the front of the vehicle. Make sure to use loctite and torque
to 55 ft lbs.
23. Locate the passenger side differential spacer. Locate the
(1) 12 mm x 70 mm socket head bolt, (1) 12 mm x 80 mm
socket head bolt and (2) 12 mm flange nuts from hardware
bag 14056NB1. Install the the new spacer to the OE brack-
et and secure using the new hardware. Special note: The
thicker part of the spacer will be installed towards the
front of the vehicle. Also, the new 12 mm x 70 mm sock-
et head bolt will be installed towards the rear of the vehi-
cle and the new 12 mm x 80 mm socket head bolt will be
installed towards the front of the vehicle. Make sure to
use loctite and torque to 55 ft lbs.
24. Locate (2) 12 mm x 35 mm bolts from hardware bag
14056NB1. Also, locate (2) 12 mm lock washers from hard-
ware bag 14056NB3. With the help from a buddy, carefully lift
the modified front differential back onto the pair of hydraulic
floor jacks and move the hydraulic floor jacks back under-
neath the vehicle so that the newly modified front differential
can be re-installed. Secure the driver side of the differential
to the newly installed driver side differential spacer using the
new hardware. Make sure to use loctite and torque to 55 ft
lbs.
25. Locate (4) 12 mm x 35 mm bolts from hardware bag
14056NB1. Also, locate (2) 12 mm lock washers and (2) 12
mm fender washers from hardware bag 14056NB3. Secure
the passenger side of the differential to the newly installed
passenger side differential spacer using the new hardware.
Make sure to use loctite and torque to 55 ft lbs.