The HD Pro aluminum 3.25-inch-bore case helps keep the rear
assembly light. The heat-treated 206-T4 case features 32 percent
more tensile strength than the more common 356-T6 aluminum,
according to Strange Engineering. It uses^9 ⁄ 16 -inch through-bolts for
durability and reduced gear deflection.The Strange Engineering G-body 9-inch housing comes as shown,
with or without a built centersection. It depends on certain factors
(like how you make the power, slicks, and setup), but this housing is
suitable for 1,000 hp. It arrives with spring perches and control-arm
brackets, ready to install into a stock G-body.
supplies top-tier NASCAR teams
with 9-inch rear axles. We called
its sister company, Strange Engi-
neering, for a Street Floater 9-inch
G-body housing (PN HF9GGME,
$839) with an HD Pro center-
section (PN P3203BB, $540) and
3:50 gears. Most rearends are
built to order, but a kit with
mostly the same components
retails for $2,685.
While we’re under the car, we’ll
finish our UMI Performance Stage
3.5 suspension (PN GBF035-2,
$3,799.99) and Wilwood Superlite
4R brakes (PN 140-12435,
$2,066.39) with parking brake.
Every component of our assembly
applies specifically to our goals:
be streetable, adjustable, hold
700 hp, improve the handling, and
save weight.
The Strange Engineering
G-body 9-inch housing features
0.141-inch mild steel, a heavy-
duty 0.282-inch-thick faceplate
with internal gussets, and
3-inch-diameter, 0.25-inch-wall
axletubes. Inside, Strange Engi-
neering’s 35-spline S-Trac is a
torque-biased, mechanical,
clutchless Posi-traction unit
(PN N1980, $995). It uses helical
gears for smooth and progressive
power transfer. During a turn, the
external force generates friction
that slows the spinning tire and
sends power to the tire with
the most traction. According to
Strange, the S-Trac will not inter-
fere with our car’s steering. It’s
claimed to be quiet, dependable,
and maintenance-free with a life-
time breakage warranty. Strange
told us the HD Pro 9, 35-spline
axles, and S-Trac are some of its
most well-rounded products that
will handle street, drag, and the
road course with ease.