Did you put on longer shackles on the front? Unless you have a
shackle reversal you changed the caster. My Jeep ('73 CJ5) has 3
degrees of caster with the stock set up. I install a 2.5 Rancho lift
and made shackles that were longer than stock to give me the travel I
wanted. I shimmed the front axil accordingly to maintain this angle
to keep it from doing the death wobble thing. Stock shackle length on
mine is 2 5/8 between bolts. I made 4" shackles. This rotated my
axil about 4 degrees giving me 1 degree in the wrong direction. I
installed a 6 degree shim (what I had handy)between the axil and the
spring. This castered me a little further than stock but it drives
fine.


"Gerald G. McGeorge" <gmcgeorge@frontier.net> wrote in message news:<bnq7lv07jt@enews1.newsguy.com>...
> No sweat. There are a lot of factors here that should be run down one at a
> time. (BTW, the body lift won't directly affect what you're describing.)
> <ABanks5@columbus.rr.com> wrote in message
> news:46_nb.94044$uJ2.66086@fe3.columbus.rr.com...
> > Thanks for the input George. I'm not sure if they shimmed the rear axle or
> > not...I'm not sure what all that involves or even what it's good for
> > (laughing). I have a combination of 4 inches of lift with the body
> > lift...but I'm not sure that has anything really to do with actual
> > suspension lift...I don't think it does. The tires were just balanced and
> > wheels/tires are all brand new. It shook before just at different speeds
> so
> > I'm inclined to believe it's something else like U joints. The alignment
> > could be the problem. Also keep in mind it's a YJ tub on a CJ...not sure
> if
> > that has anything to do with it. Seems pretty solid.
> > Thanks again!
> > Allen
> >
> > "Gerald G. McGeorge" <gmcgeorge@frontier.net> wrote in message
> > news:bnpouq02g8u@enews1.newsguy.com...
> > > Ok, time to pontificate. NEVER install a lift and larger tires without
> > > correcting things like bad motor mounts, driveline angles, alignment,
> etc.
> > > You;re just asking for trouble, from the death and injury type, to
> simply
> > > being disappointed.
> > >
> > > With a 2.5" lift you won;t need to drop the pitman, 4", yes you will.
> Also,
> > > on a CJ7 with a 2.5" lift you may be able to get away with not dropping
> the
> > > t-case, it's simply a matter of correcting the angles . (Did they shim
> the
> > > rear axle?)
> > >
> > > As for the shake, get it aligned and see what the caster angle is in
> front,
> > > plus recheck the tire balance and wheel runout. This doesn't sound right
> and
> > > it SURE doesn't sound safe.
> > >
> > >
> > >
> > > <ABanks5@columbus.rr.com> wrote in message
> > > news:epZnb.93872$uJ2.2171@fe3.columbus.rr.com...
> > > > Just got my 83 CJ7 back from getting a new skyjacker 2.5 inch lift and
> new
> > > > steering stabilizer. The jeep had a 2 inch body lift on it. Also put
> 10
> inch
> > > > wheels with 33 x 13.5 superswamper TSLs on it. Before it had shocks
> that
> > > > were shot, bushings that were falling apart, and 31 inch tires with 8
> in
> > > > wheels. Also before, it had a bad vibration at around 50-60 mph.
> > > > Also,...with 4 inches of lift...they didn't think it was necessary to
> > > > replace the pitman arm,...or adjust the transfer case...is this cool
> or
> > > > not?!?
> > > >
> > > > Now....my first impression was a low growl "seemingly" coming from up
> front
> > > > like a bearing going out?!?! This only happens at slow speeds. These
> tires
> > > > are actually very very quite compared to BFG MTs I had on another
> jeep.
> > > > Anyway...my second impression was a bit of wandering that the jeep
> never
> > > > had! On the highway there is also a bit of death wobble....slight back
> and
> > > > forth motion. I'm a bit afraid to take it over 65. The next....and
> most
> > > > horrendous part....that shake I had....it's 10 times worse...only this
> time
> > > > it happens between 45-55 mph! And I mean it shakes the HELL out of me.
> > > >
> > > > So my questions are....where is this shake coming from? U joints???
> It's
> got
> > > > a bad transmission mount/motor mounts but I doubt this is the problem.
> And
> > > > what can I do about the wandering??? It's got all new body mount
> bushings,
> > > > New shackles and bushings, new shocks, steering stabilizer. What is up
> with
> > > > this?!?!
> > > > All in all the ride is very very smooth over bumps etc. But I've got
> tons
> > > > more rattles, wander characteristics, and a more pronounced shake!
> > > >
> > > > Thanks!
> > > > Allen
> > > >
> > > >
> > > >
> > >
> > >
> >
> >

 

Did you put on longer shackles on the front? Unless you have a
shackle reversal you changed the caster. My Jeep ('73 CJ5) has 3
degrees of caster with the stock set up. I install a 2.5 Rancho lift
and made shackles that were longer than stock to give me the travel I
wanted. I shimmed the front axil accordingly to maintain this angle
to keep it from doing the death wobble thing. Stock shackle length on
mine is 2 5/8 between bolts. I made 4" shackles. This rotated my
axil about 4 degrees giving me 1 degree in the wrong direction. I
installed a 6 degree shim (what I had handy)between the axil and the
spring. This castered me a little further than stock but it drives
fine.


"Gerald G. McGeorge" <gmcgeorge@frontier.net> wrote in message news:<bnq7lv07jt@enews1.newsguy.com>...
> No sweat. There are a lot of factors here that should be run down one at a
> time. (BTW, the body lift won't directly affect what you're describing.)
> <ABanks5@columbus.rr.com> wrote in message
> news:46_nb.94044$uJ2.66086@fe3.columbus.rr.com...
> > Thanks for the input George. I'm not sure if they shimmed the rear axle or
> > not...I'm not sure what all that involves or even what it's good for
> > (laughing). I have a combination of 4 inches of lift with the body
> > lift...but I'm not sure that has anything really to do with actual
> > suspension lift...I don't think it does. The tires were just balanced and
> > wheels/tires are all brand new. It shook before just at different speeds
> so
> > I'm inclined to believe it's something else like U joints. The alignment
> > could be the problem. Also keep in mind it's a YJ tub on a CJ...not sure
> if
> > that has anything to do with it. Seems pretty solid.
> > Thanks again!
> > Allen
> >
> > "Gerald G. McGeorge" <gmcgeorge@frontier.net> wrote in message
> > news:bnpouq02g8u@enews1.newsguy.com...
> > > Ok, time to pontificate. NEVER install a lift and larger tires without
> > > correcting things like bad motor mounts, driveline angles, alignment,
> etc.
> > > You;re just asking for trouble, from the death and injury type, to
> simply
> > > being disappointed.
> > >
> > > With a 2.5" lift you won;t need to drop the pitman, 4", yes you will.
> Also,
> > > on a CJ7 with a 2.5" lift you may be able to get away with not dropping
> the
> > > t-case, it's simply a matter of correcting the angles . (Did they shim
> the
> > > rear axle?)
> > >
> > > As for the shake, get it aligned and see what the caster angle is in
> front,
> > > plus recheck the tire balance and wheel runout. This doesn't sound right
> and
> > > it SURE doesn't sound safe.
> > >
> > >
> > >
> > > <ABanks5@columbus.rr.com> wrote in message
> > > news:epZnb.93872$uJ2.2171@fe3.columbus.rr.com...
> > > > Just got my 83 CJ7 back from getting a new skyjacker 2.5 inch lift and
> new
> > > > steering stabilizer. The jeep had a 2 inch body lift on it. Also put
> 10
> inch
> > > > wheels with 33 x 13.5 superswamper TSLs on it. Before it had shocks
> that
> > > > were shot, bushings that were falling apart, and 31 inch tires with 8
> in
> > > > wheels. Also before, it had a bad vibration at around 50-60 mph.
> > > > Also,...with 4 inches of lift...they didn't think it was necessary to
> > > > replace the pitman arm,...or adjust the transfer case...is this cool
> or
> > > > not?!?
> > > >
> > > > Now....my first impression was a low growl "seemingly" coming from up
> front
> > > > like a bearing going out?!?! This only happens at slow speeds. These
> tires
> > > > are actually very very quite compared to BFG MTs I had on another
> jeep.
> > > > Anyway...my second impression was a bit of wandering that the jeep
> never
> > > > had! On the highway there is also a bit of death wobble....slight back
> and
> > > > forth motion. I'm a bit afraid to take it over 65. The next....and
> most
> > > > horrendous part....that shake I had....it's 10 times worse...only this
> time
> > > > it happens between 45-55 mph! And I mean it shakes the HELL out of me.
> > > >
> > > > So my questions are....where is this shake coming from? U joints???
> It's
> got
> > > > a bad transmission mount/motor mounts but I doubt this is the problem.
> And
> > > > what can I do about the wandering??? It's got all new body mount
> bushings,
> > > > New shackles and bushings, new shocks, steering stabilizer. What is up
> with
> > > > this?!?!
> > > > All in all the ride is very very smooth over bumps etc. But I've got
> tons
> > > > more rattles, wander characteristics, and a more pronounced shake!
> > > >
> > > > Thanks!
> > > > Allen
> > > >
> > > >
> > > >
> > >
> > >
> >
> >

 

Did you put on longer shackles on the front? Unless you have a
shackle reversal you changed the caster. My Jeep ('73 CJ5) has 3
degrees of caster with the stock set up. I install a 2.5 Rancho lift
and made shackles that were longer than stock to give me the travel I
wanted. I shimmed the front axil accordingly to maintain this angle
to keep it from doing the death wobble thing. Stock shackle length on
mine is 2 5/8 between bolts. I made 4" shackles. This rotated my
axil about 4 degrees giving me 1 degree in the wrong direction. I
installed a 6 degree shim (what I had handy)between the axil and the
spring. This castered me a little further than stock but it drives
fine.


"Gerald G. McGeorge" <gmcgeorge@frontier.net> wrote in message news:<bnq7lv07jt@enews1.newsguy.com>...
> No sweat. There are a lot of factors here that should be run down one at a
> time. (BTW, the body lift won't directly affect what you're describing.)
> <ABanks5@columbus.rr.com> wrote in message
> news:46_nb.94044$uJ2.66086@fe3.columbus.rr.com...
> > Thanks for the input George. I'm not sure if they shimmed the rear axle or
> > not...I'm not sure what all that involves or even what it's good for
> > (laughing). I have a combination of 4 inches of lift with the body
> > lift...but I'm not sure that has anything really to do with actual
> > suspension lift...I don't think it does. The tires were just balanced and
> > wheels/tires are all brand new. It shook before just at different speeds
> so
> > I'm inclined to believe it's something else like U joints. The alignment
> > could be the problem. Also keep in mind it's a YJ tub on a CJ...not sure
> if
> > that has anything to do with it. Seems pretty solid.
> > Thanks again!
> > Allen
> >
> > "Gerald G. McGeorge" <gmcgeorge@frontier.net> wrote in message
> > news:bnpouq02g8u@enews1.newsguy.com...
> > > Ok, time to pontificate. NEVER install a lift and larger tires without
> > > correcting things like bad motor mounts, driveline angles, alignment,
> etc.
> > > You;re just asking for trouble, from the death and injury type, to
> simply
> > > being disappointed.
> > >
> > > With a 2.5" lift you won;t need to drop the pitman, 4", yes you will.
> Also,
> > > on a CJ7 with a 2.5" lift you may be able to get away with not dropping
> the
> > > t-case, it's simply a matter of correcting the angles . (Did they shim
> the
> > > rear axle?)
> > >
> > > As for the shake, get it aligned and see what the caster angle is in
> front,
> > > plus recheck the tire balance and wheel runout. This doesn't sound right
> and
> > > it SURE doesn't sound safe.
> > >
> > >
> > >
> > > <ABanks5@columbus.rr.com> wrote in message
> > > news:epZnb.93872$uJ2.2171@fe3.columbus.rr.com...
> > > > Just got my 83 CJ7 back from getting a new skyjacker 2.5 inch lift and
> new
> > > > steering stabilizer. The jeep had a 2 inch body lift on it. Also put
> 10
> inch
> > > > wheels with 33 x 13.5 superswamper TSLs on it. Before it had shocks
> that
> > > > were shot, bushings that were falling apart, and 31 inch tires with 8
> in
> > > > wheels. Also before, it had a bad vibration at around 50-60 mph.
> > > > Also,...with 4 inches of lift...they didn't think it was necessary to
> > > > replace the pitman arm,...or adjust the transfer case...is this cool
> or
> > > > not?!?
> > > >
> > > > Now....my first impression was a low growl "seemingly" coming from up
> front
> > > > like a bearing going out?!?! This only happens at slow speeds. These
> tires
> > > > are actually very very quite compared to BFG MTs I had on another
> jeep.
> > > > Anyway...my second impression was a bit of wandering that the jeep
> never
> > > > had! On the highway there is also a bit of death wobble....slight back
> and
> > > > forth motion. I'm a bit afraid to take it over 65. The next....and
> most
> > > > horrendous part....that shake I had....it's 10 times worse...only this
> time
> > > > it happens between 45-55 mph! And I mean it shakes the HELL out of me.
> > > >
> > > > So my questions are....where is this shake coming from? U joints???
> It's
> got
> > > > a bad transmission mount/motor mounts but I doubt this is the problem.
> And
> > > > what can I do about the wandering??? It's got all new body mount
> bushings,
> > > > New shackles and bushings, new shocks, steering stabilizer. What is up
> with
> > > > this?!?!
> > > > All in all the ride is very very smooth over bumps etc. But I've got
> tons
> > > > more rattles, wander characteristics, and a more pronounced shake!
> > > >
> > > > Thanks!
> > > > Allen
> > > >
> > > >
> > > >
> > >
> > >
> >
> >