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- From: beaubien@hardy.u.washington.edu (Scott deBeaubien)
- Subject: Re: Lifting a JEEP Wrangler?
- Message-ID: <1992Oct15.200953.11251@u.washington.edu>
- Sender: theronin@shelley.u.washinton.edu (Scott deBeaubien "The Ronin")
- Organization: University of Washington, Seattle
- References: <1992Oct9.220023.14270@jupiter.sun.csd.unb.ca>
- Date: Thu, 15 Oct 1992 20:09:53 GMT
- Lines: 87
-
- In article <1992Oct9.220023.14270@jupiter.sun.csd.unb.ca> q1hl@jupiter.sun.csd.unb.ca (Nameless CS Student) writes:
- >In article <Bvv7E6.6Dw@cup.hp.com> dhepner@cup.hp.com (Dan Hepner) writes:
- >>More arched springs will result in more wheel travel, useful when
- >>traveling over rough terrain. Spring shackle changes, or adding one
- >>block above the spring and below the diff, will all constitute fairly
- >>inexpensive ways of raising the fender well to clear larger tires.
- >>On jeeps with the spring below the diff, it is possible to move it
- >>above.
- >
- >PLEASE SAY WHERE I CAN GET THIS KIT! I've been searching *forever*
- >for a spring mount conversion to put my springs ABOVE the axel, but
- >most off-road shops just look at me like I've got 2 heads or
- >something.... I know they exist, but where? (I have an '88 Jeep
- >Wrangler/YJ) Please send MAIL, as the newsgroups sometimes scroll
- >between reads.
- >
-
- No such kit exists. All the jeeps I've seen with this "over the axle"
- spring conversion have been strictly custom.
-
- ... stuff deleted...
-
- >Well, with a 2" add-a-leaf lift and a Rugged Trail RS5000 shock on
- >each corner, I can now feel every crack and pebble on the pavement.
- >Mind you, I can also carry over 1000 lbs of people and equipment
- >off-road without even *thinking* about ground clearance or bottoming
- >the shocks. :-)
- >
-
- Two things: First, your machine still would not "bottom" the shocks,
- that's what bump stops on the frame are for -- to prevent you from
- damaging your shocks -- and if you've just got an add-a-leaf with
- stock shocks -- then you can't "bottom" your shock; Second, just an
- observation, these stiff suspensions that we jeepers have on our rigs
- are similar to the suspensions on sports coupes (ala MG and Datsun 2000)
- a friend once observed "I can feel a dime at 5 miles per hour, but I could
- sure drive right over a 3" bump at 70 miles an hour with no problem"
- He owned a sports coupe my '85 Scrambler with a Rancho 2.5" and extended
- shackles and 33" tires should handle a 5" to 6" bump with no problem :).
-
-
- >>Significant lifts require modified steering and driveline parts.
- >
- >What is significant?
-
- Rancho says 2.5" is the max you can go, thus, their 2.5" suspension
- lift kit. Superlift sells a 4" lift kit that comes with the drop-down
- pitman arm -- this is to keep all your steering components as close to
- horizontal as possible. This is the way the system is designed to be!
- If your center link is not horizontal, your steering may experience
- abnormal stresses which manifest themselves as "pulling" or wander.
-
-
- >What do the mods entail? The drive shafts
- >(front and rear) are both telescoping, and the steering shouldn't
- >require more than a simple adjustment to re-center the wheels- the
- >Jeep steering seems *designed* for high-lift use: the wheels are
- >connected by a tie-rod (which controls toe-in/out), and the wheels
- >are turned via a "center link" which runs from the right wheel to
- >the steering arm on the left side of the vehicle. Raising the Jeep
- >should involve no more than lengthening the center link to adjust
- >for the (marginally) greater distance between the right tire and
- >the steering arm. 6-inches of lift would require less than a
- >half-inch of adjustment, well within the adjustable range of the
- >center-link ends.
- >--
- >Chris.
-
- (see above). And as to drive shafts, in a suspension lift, you not only
- change the angle of the driveline, you change the length as well. This
- IS significant as the yoke only has so much tolerance beyond which, well
- let's just say if you got airborn on a vehicle that was overlifted and
- you came down real hard and bounced, you might find your vehicle not
- drivable anymore as the yoke will pull out from the differential. This
- is the reason (I think) why Rancho only goes 2.5" where Superlift goes
- 4" on a suspension lift.
-
- I'm not a mechanic so I don't claim to be really technical or anything.
- I am just a jeep lover who has done a lot of modification to my own rig
- and I've done a lot of looking around at the various after-market products
- that are available. As to the original question as to what is the "best"
- way to lift a rig? My answer is go talk to someone at one of those
- after-market 4WD places and let them give you their opinions! It really
- does depend on the application.
-
-
-
-