Tuff Country 14810 - GM 88-98 K1500 / K2500 6lug 4 - Manual (Page 7)

42. Locate the stock driver side rear differential mounting
bracket hardware that was removed from step # 28.
Install the rear portion of the stock 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. Make sure to use thread locker
or lock tite.
See Illustration # 12
43. Locate the stock upper front differential hardware that
was removed from step # 32. Working on the driver side,
secure the new driver side differential relocation bracket
to the front part of the newly installed one piece lower
sub frame and secure using the stock hardware. Do not
tighten at this point. Make sure to use thread locker
or lock tite.
See Illustration # 13
44. Using a pair of hydraulic floor jacks, carefully raise up
on the front portion on the new one piece lower sub
frame until the front portion of the new one piece lower
sub frame sits flush with the stock front cross member.
Using the holes in the front portion of the new one piece
lower sub frame as a guide, carefully drill (2) 1/2” holes
into the stock front cross member.
45. Locate (2) 1/2” x 1 1/4” bolts, (2) 1/2” unitorque nuts,
(4) 1/2” flat washers and (2) 1/2” lock washers from
hardware bag 14810NB3. Secure the new front portion of
the new one piece lower sub frame to the stock front
cross member using the new 1/2” x 1 1/4” bolts and
hardware. Torque to 85 ft lbs. Make sure to use thread
locker or lock tite.
See Illustration # 14
46. Carefully remove both hydraulic floor jacks from
under the front portion of the new one piece lower sub
frame.
47. Working in this order, torque the following stock and
new hardware to their 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 driver
side, torque the stock hardware that connects the new
driver side differential relocation bracket to the front tabs
located on the front portion 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 driver
side, torque the stock hardware that connects the new
one piece lower sub frame to the stock front and rear
lower control arm pockets to 105 ft lbs. Finally, working
on the passenger side, torque the stock hardware that
connects the new one piece lower sub frame to the stock
front and rear lower control arm pockets to 105 ft lbs.
48. Locate (2) poly bump stops from hardware bag
14810PL. Also, locate (2) 3/8” lock nuts, (2) 3/8” flat
washers and (2) 3/8” lock washers from hardware bag
14810NB1. Working on the driver side, install the new
poly bump stop into the newly installed one piece lower
sub frame and secure using the new 3/8” hardware.
Torque to 28 ft. lbs. Make sure to use thread locker or
lock tite. Repeat procedure on passenger side.
See Illustration # 15
49. Locate (2) 5/8” x 4 1/2” bolts, (2) 5/8” x 5 1/2”, (4) 5/8”
unitorque nuts, (8) 5/8” flat washers, (4) 5/8” unitorque
nuts, (4) 5/8” lock washers from hardware bag
14810NB5. Also, locate the stock driver and passenger
side lower control arms that were removed from step #
26. Working on the driver side, install the stock lower
control into the newly installed one piece lower sub frame
front location and secure using the new 5/8” x 4 1/2” bolt
and hardware. Do not tighten at this point. Make sure
to use thread locker or lock tite. Next, secure the rear
portion of the stock lower control arm into the rear portion
of the newly installed one piece lower sub frame and
secure using the new 5/8” x 5 1/2” bolt and hardware. Do
not tighten at this point. Make sure to use thread
locker or lock tite. Repeat procedure on passenger
side.
See Illustration # 16 / Front Location
See Illustration # 17 / Rear Location
50. Locate the new driver side steering knuckle and the
stock hub assembly and the stock hardware for the upper
control arm ball joint and the stock hardware for the lower
control arm ball joint that was removed from step # 19.
Using the stock hardware, secure the new driver side
steering knuckle and stock hub assembly to the stock
upper control arm ball joint and the stock lower control
arm ball joint. Make sure to use thread locker or lock
tite. Special Note: Do not install the stock outer tie
rod to the new steering knuckle at this point. Torque
the stock upper ball joint hardware to 37 ft lbs. and the
stock lower ball joint hardware to 74 ft lbs. Repeat
procedure on the passenger side using the passenger
side steering knuckle.
See Illustration # 18
51. Locate (12) 10 mm x 55 mm bolts and (12) 10 mm
lock washers from hardware bag 14810NB1. Locate (2)
new axle half shaft spacers. Also, locate the stock driver
and passenger side CV axles that were removed from
step # 24. Working on the driver side, install the stock CV
axle into the newly installed steering knuckle. Special
Note: Take special care note to damage the threads
on the CV axle or the inner tulip joints. Install (1) new
axle spacer between the stock front differential and the
stock axle. Secure using the new 10 mm x 55 mm bolts
and hardware. Torque to 45 ft. lbs. Make sure to use
thread locker or lock tite. Special Note: Make sure
that the stock axle is re-installed back into the stock