ididit Retrofit Steering Column: 1955-59 Chevy Truck - Manual (Page 4)

2
Delrin Installation
Slide the provided Delrin seal for the gearbox over the
shaft and push down. Secure the Delrin by screwing
in the 3 set screws. Do not over tighten. Next slide
the coupler onto the shaft of the gearbox and tighten
the Coupler.
Underdash & Floor Mount Installation:
Now that we have the column tube removed and
the box has been modified, the
Underdash Mount has been
removed and the Floor Mount
removed we will then need to
clean and prepare the new dash
and floor mounts.
2 1/4”
Measure up the shaft from the face of the gearbox 2 1/4” and cut the input
shaft. The shaft of the gearbox will now need to be cut into a DD shaft.
This is a round shaft with flats centered on two sides. An easy way to do
this is to make a paper template. Create your own template by using the
measurements from the diagram below.
Starting from an 1/8 from the bottom, wrap the paper template around the
shaft and match the horizontal arrows together.
Mark the shaft at the 8 vertical arrow points and draw a line down the length
of the shaft, connecting the marks. This will create the shaded “D” sections
found on the template.
With a grinder or similar tool, grind flat the shaded “D” sections to match
the DD shaft. As you work, use the coupler as a guide and test fit to ensure
proper fitting.
Another option would be to remove the gearbox and take it to your local
machine shop to be modified.
Note: Diagram
not to scale
.395
.945
1.525
2.075
2.356
1.000”
DD SHAFT
TEMPLATE
To make 3/4 DD shaft
remove .100” from opposite
sides of the shaft
Original Shaft
New DD Shaft