Tuff Country 16730 - GM 88-91 1/2 ton Blazer / Sub 6 box kit - Manual (Page 5)

40. Carefully remove both hydraulic floor jacks from
under the transfer case cross member.
41. Check and double check to make sure that all step
related with the front and rear end were performed
properly. Check and double check to make sure that all
stock and new hardware is torque to proper torque
specifications. Use the torque sheet at the beginning of
the installation manual.
42. Install the tires and wheels and safely lower the
vehicle to the ground.
43. Once the installation is complete, make sure to bleed
the brake lines. Also, using the proper brake fluid, make
sure to top off the brake fluid level.
CONGRATULATIONS INSTALLATION
Special Note: After the completion of the
installation, Tuff Country EZ-Ride
Suspension recommends taking the vehicle
to an alignment shop and having a proper
front end alignment performed.
It is also a good idea to keep a close watch
on the front and rear drive line U-joints. If
they start to wear out, make sure to replace
them.
If you have any questions or concerns,
please feel free to contact Tuff Country or
your local Tuff Country dealer.
Torque Settings
5/16” 15—18 ft lbs.
3/8” 28—32 ft lbs.
7/16” 30—35 ft lbs.
1/2” 65—85 ft lbs.
9/16” 85—120 ft lbs.
5/8” 95—130 ft lbs.
3/4” 100—140 ft lbs.
32. Locate (2) new 5.5” lifted rear blocks. Working on the
driver side, install (1) new 5.5” lifted block between the
stock rear axle and the stock spring assembly. Special
Note: The new 5.5” lifted block has a slight taper to
it, the small end of the new block needs to be
installed with the small end towards the front of the
vehicle. Repeat procedure on passenger side.
See Illustration # 9
33. Raise up on both hydraulic floor jacks at the same
time until the driver and passenger side stock spring
assembly seats flush with newly installed 5.5” block.
34. Locate (4) new 5/8” x 3” x 14” Round U-bolts, (8) 5/8”
U-bolt high nuts, (8) 5/8” U-bolt washers and the stock
upper U-bolt plates that were removed from step # 28.
Working on the driver side, install (2) new 5/8” x 3” x 14”
round U-bolts into the stock location and secure using
the new 5/8” high nuts and washers. Torque to 130 ft
lbs. Repeat procedure on passenger side. Special
Note: With a suitable cutting tool, cut off the excess
U-bolt threads on all (4) rear U-bolts.
See Illustration # 9
35. Working on the driver side, install the new rear
shocks absorbers using the stock hardware removed
from step # 27. Special Note: Shocks are not included
with this suspension system, shocks need to be
ordered as a separate part number, Tuff Country EZ-
Ride Suspension recommends using a 30” fully
extended nitrogen gas shocks. Repeat procedure on
passenger side.
See Illustration # 9
36. Place a pair of hydraulic floor jacks under the stock
transfer case cross member. Place one hydraulic floor
jack on the driver side and one on the passenger side.
Carefully raise up on both hydraulic floor jacks at the
same time until they come into contact with the stock
transfer case cross member.
37. Working on the driver side, remove the stock
hardware that connects the stock transfer case cross
member to the stock frame rail. The stock hardware may
be discarded. Repeat procedure on the passenger side.
38. Carefully lower down on both hydraulic floor jacks at
the same time approximately 2”. This will allow enough
room for the new transfer case drop kit to be installed.
39. Locate (2) transfer case drop tubes, (4) 7/16” x 3”
bolts, (4) 7/16” flat washers and (2) 7/16” unitorque nuts.
Working on the driver side, install the new transfer case
drop tube between the stock transfer case cross member
and the stock frame rail. Secure using the new 7/16” x
3” bolts and hardware. Torque to 35 ft lbs. Special
Note: The transfer case drop tubes are the tubes that
measure 1 1/2” tall. Repeat procedure on the
passenger side.
See Illustration # 10