93 TECH TIPS
TECH TIPS STEERING BOXES & RACKS
APPLICATION SIZE DIA. SPLINE
FORD RACK
Mustang II & Pinto Manual
9/16”-26
.563
26
Mustang II & Pinto Power
3/4”-36
.750
36
FORD BOX
Manual & Power 3/4”-36 .750 36
GM BOX MANUAL
Vega
5/8”-36
.625
Corvair
5/8”-36
.625
Corvette (63-68)
3/4”-36
.750
Corvette (69-82)
3/4”-30
.750
Model 122 (65-85)
3/4”-30
.750
3/4”-36
.750
Model 525 (86 - Present)
3/4”-30
.750
36
36
36
30
30
36
30
GM POWER BOX
Model 605 (78-84)
Model 800 (77-Prior)
Model 800 (78-Present)
3/4”-30
13/16”-36
3/4”-30
.750
.813
.750
30
36
30
GM RACK
79-Present
Variations
Corvette (84-Present)
Fiero
5/8”-36
3/4”-30
17MM DD
17MM DD
.625
.750
.670
.670
36
30
.570
.570
CHRYSTLER BOX OR RACK
Omni Manual
Omni Power
Power Box
Manual Box
9/16”-26
9/16”-36
5/8”-36C
3/4”-36
.563
.563
.750
26
36
36
36
MISC.
Jaguar & MGB
VW Rabbit - Diesel
BMW
3/4”-48
3/4”-36
17MM-54
.750
.750
.670
48
36
54
SIX SIMPLE STEPS FOR ORDERING A
FLAMING RIVER STEERING SYSTEM:
1
Choose the type of intermediate shaft you will be using—
Splined or DD. This will determine one side of the Universal
Joint that you will need to order.
2
Determine whether you will need a two or three U-Joint system.
This is dictated by the angle—we recommend a 15° angle for
the optimal setup, however up to 30° is acceptable. If using
a three U-Joint system, a Support Bearing is necessary. The
center U-Joint should either be 3/4” DD X 3/4” DD or 3/4”-36
X 3/4”-36 depending on whether you are using splined or DD
shafts.
3
Use the Reference Application Chart to select the proper Rack
and Pinion or Steering Box spline size for your system. If the
chart does not list your application, just measure the diameter
of the shaft and count the number of individual splines. If there
is a flat, count half of the splines and then double that number.
4
Measure your column’s output shaft. If it is a DD shaft (two
rounds, two flats), then measure the rounds—it will either be a
1” DD or 3/4” DD. If there are splines, then measure the diameter
and count the individual splines—it will either be 1”-48 or 3/4”-
36.
5
If you are using splined shafts and a two U-Joint system, then
measure the distance between the steering gear shaft and the
column and then subtract 3-1/4”. Round this number up to the
next whole number to determine the shaft length you require.
6
If you are using a three U-Joint system, we recommend using
dowel rods to mock up the system. Simply measure the length
of the dowel rod and this will be the length of the shaft you will
require. DD shafting can easily be cut down to size.
UNIVERSAL JOINT YOKE SHAPES
SHOWN DOWN BELOW
SMOOTH SPLINE
IMPORTANT NOTES:
DOUBLE-D
(DD)
PYRAMID
(LATE FORD/MUSTANG)
FLAMING RIVER
POWER RACK
Phasing – Keep the forks of the yokes closest to each other
in line, and parallel to the center of the shaft to avoid
binding.
NEVER weld a Universal Joint! Welding reduces the strength
of the metal and can melt the needle bearing seal.
Set screws are supplied on all splined and DD Universal
Joints. However, it is necessary to indent, by drilling, the
shaft to properly secure the set screw mechanism. A red
thread locker should also be used. Periodically inspect the
set screws to ensure tightness.
The shaft should be installed 7/8” into the yoke (flush).
A shaft that does not engage fully could sacrifice the
strength of the system. However, if a shaft is too long, it
can cause the shaft to interfere (bind) with the operation
of the system.