What is the difference between the standard YJ kit and the Extreme duty kit?
The Extreme duty contains the following additional parts to complete the suspension
package; Front and rear greasable shackle kits, greasable main eye bushing kit,
front and rear stainless steel brake lines, and a drop pitman arm. In addition to
these parts, the springs included in the kit are the tried and true Extreme duty
springs. Made by a major North American leaf spring manufacture. These springs undergo
a strict material and production quality control so that the consumer gets nothing
but the best in leaf spring quality.
Are the Standard leaf springs military wrapped?
Yes, Both our standard and Extreme duty springs feature a military wrap on the
main eye end.
Which control arm should I run?
The choice of control arm depends on the type of use you intend for you Jeep.
For those wanting to lift there Jeep to clear larger tires but don???t intend using
the vehicle off-road we recommend using the Super-Ride series control arm. This
will provide the most control of road noise that can be transmitted to the cab of
the vehicle due to the use of rubber bushings at both ends of the control arm. If
you intend to use your Jeep off-road also, the Super-Flex series is recommended.
The spherical joint in the Super-Flex arm will provide the best performance for
on and off-road applications. Both series of arms are available in fixed and adjustable
lengths. TJ front and rear, and XJ/ZJ front, fixed length lower arms are used for
lifts up to 4.5". We recommend that adjustable arms are used in the upper positions
for maximum adjustability. For the ZJ rear, you must use the adjustable version
lower control arm.
Where does the coil spring spacer go, top or bottom? Where does the flat spot
go?
Coil spring spacers always go on the top of the coil. You can use them with
or without the stock spring isolator. The flat spot is only critical on a ZJ rear
where the spacer would other wise interfere with the side of the unibody.
Which drive shaft do I need to order?
The drive shaft style you chose is dependent on the SYE kit you choose. For
the RE1801 & RE1807 you need the RE1898 series shaft. The RE1811 SYE kit will
require the use of the RE1860 series drive shaft. Rubicon model Jeeps require the
RE1895 "direct fit" drive shaft.
How long of a driveshaft do I need to order?
The drive shaft length is determined from the length of your stock drive shaft.
To measure your drive shaft you need to measure from center to center of the upper
and lower u-joints. If you order a RE1801 or RE1807 you will need to add 5.5"
to your drive shaft length for the RE1811 add 4.5" to you measurement. Example,
If you measure your TJ wrangler stock drive shaft at 11" and your installing
a RE1807 you would need to order a RE1898-165. If you measurement does not match
exactly, round down to the nearest size for a short arm kit and round up for a long
arm kit. For YJ, XJ, & ZJ always round up to the nearest size.
What is the difference between the superride and superflex kits?
Super-Ride kits contain control arms with rubber bushings at both ends rather
than the Super-flex kits which have a rubber bushing on one end and a S/F joint
on the other. Super ride kits will generally transmit less road noise to the cab
of the vehicle due to the rubber at both ends of the arm. Super-flex kits will have
minimal axle bind when articulated off-road due to the Super-flex joint.
What are the measurements of the superflex joints? What size bolts do they use?
Rubicon Super-Flex joints are built to fit into factory bracketry. Small joints,
designed for use in the upper control arm location are 2" wide, ear to ear
and utilize a 10mm thru bolt. The large joint for the lower control arms are 2 5/8"
ear to ear and utilize a 9/16" thru bolt. We recommend using only grade 10.9
metric bolts and grade 8 SAE bolts with our S/F joints.
Which way do I install the RE3700???s?
The RE3700 installs with the rubber bushing at the chassis end and the S/F joint
at the axle end. At the axle the grease fitting will be on the top of the joint
out of harms way.
Why are my center pins bottoming out on the axle tube?
Rubicon specs our leaf spring with spacers or longer heads on the spring pins.
The reason for this is that most kits will require a shim of some sort. When adding
the shim the pin height is usually reduced. If not using a shim and the pin hits
the tube you can remove the spacer if equipped or grind the head of the pin down.
Either way it is very important that the pin does not hit the tube of the axle before
the spring is fully seated on the spring perch.
Do you make anything for the WJ or KJ?
Rubicon does not currently manufacture any products for the WJ over 2"
or anything for KJ.
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