Lift nightmare part II
11-21-2005, 02:53 AM
#21
Guest
Posts: n/a
Re: Lift nightmare part II
You need to make the two ends parallel, as Mike says. You need to use some
kind of instrument, to measure where they are both pointing, and then bring
them in line with each other. If you don't know what is going on, then
tilting the pinion up or the transfer case down, by guess work, is not going
to solve the problem.
Earle
"Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
news:ZYednSExvrvixhzeRVn-qA@comcast.com...
> I home-brewed a 1" T-case drop today. It helped a little, but the noise is
> worse now on the freeway, nearly gone at low speeds.
>
> What gives?
>
> Carl
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43810FB3.9E8735DB@sympatico.ca...
> > You are going to have to change some angles then. How far off are the
> > two ends from being parallel? Folks use an angle finder or a string
> > plumb bob and protractor to compare them or a small level and
> > protractor.
> >
> > The vib is actually the u-joint jamming and popping loose from the jam.
> > It will eat them fast and damage the bearings and seals at the t-case
> > and pinion.
> >
> > My CJ7 is at the edge and buzzes when run empty. If I put a load on, it
> > runs smooth.
> >
> > Mike
> >
> > Carl wrote:
> >>
> >> Checked all my fasteners... everything was tight as can be. The vibe is
> >> only
> >> really noticeable between 25 and 35mph, after that it smoothes out. I
> >> have
> >> stock shackles, the rear lift is just 3.5" lift springs.
> >>
> >> Any input?
> >>
> >> Carl
> >>
> >> "Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
> >> news:--CdneDdlbLPIh3eRVn-rA@comcast.com...
> >> > The pinion is looks to be at the stock angle of pretty much nill. The
> >> > T-case is the same. I'll check all the bolts and everything.
> >> >
> >> > Thanks Mike.
> >> >
> >> > Carl
> >> >
> >> >
> >> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> >> > news:438093A3.40632F94@sympatico.ca...
> >> >> You need to see what way the new springs set the pinion. It might
> >> >> need
> >> >> to tip down. It will need to tip down if the lift used longer
> >> >> shackles.
> >> >>
> >> >> You are looking for the pinion to be parallel with the t-case
output.
> >> >> So if the T-case output is flat or | , then you want |------| .
If
> >> >> the t-case is tilted down /, then you want /------/ . If you use a
> >> >> double cardan driveshaft, you want to point the rear pinion right at
> >> >> the
> >> >> t-case.
> >> >>
> >> >> I have seen kits for lowering XJ skid plates at one of the online
4x4
> >> >> places. Here is one: http://www.4wd.com/shop/search.asp
> >> >>
> >> >> I would be double checking the nuts and bolts first though.
Something
> >> >> could just have worked loose.
> >> >>
> >> >> Mike
> >> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> >> 88 Cherokee 235 BFG AT's
> >> >> Canadian Off Road Trips Photos: Non members can still view!
> >> >> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> >> >> (More Off Road album links at bottom of the view page)
> >> >>
> >> >> Carl wrote:
> >> >>>
> >> >>> 91 XJ 4.0, D35. 3.5" RE Super-Ride kit w/full rear springs.
> >> >>>
> >> >>> Got my brakes fixed today.. to the tune of $200. Ended up with all
> >> >>> new
> >> >>> steel
> >> >>> lines and a total brake job. Brakes are great now.
> >> >>>
> >> >>> Last night, there was a slight vibe from the rear between 25-35mph.
> >> >>> Today
> >> >>> while driving around looking for my car that was stolen, the vibe
has
> >> >>> increased to 20-50mph, and is much worse. It's more the noise than
> >> >>> the
> >> >>> feeling. I'm thinking rear U-joints? The pinion angle is stock, but
> >> >>> the
> >> >>> driveshaft angle didn't look bad. Will new U-joints cure my
problem?
> >> >>>
> >> >>> I was thinking a T-case drop might be my best bet if the vibe
> >> >>> continues
> >> >>> after new u-joints, but two of the four bolts holding the T-case up
> >> >>> are
> >> >>> studs instead of bolts. :-( Failing the T-case drop, I'll need some
> >> >>> shims to
> >> >>> tip the pinion up a bit. How many degrees for a 3.5" lift? I was
> >> >>> thinking
> >> >>> 2-3?
> >> >>>
> >> >>> What a day...
> >> >>>
> >> >>> Carl
> >> >
> >> >
>
>
kind of instrument, to measure where they are both pointing, and then bring
them in line with each other. If you don't know what is going on, then
tilting the pinion up or the transfer case down, by guess work, is not going
to solve the problem.
Earle
"Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
news:ZYednSExvrvixhzeRVn-qA@comcast.com...
> I home-brewed a 1" T-case drop today. It helped a little, but the noise is
> worse now on the freeway, nearly gone at low speeds.
>
> What gives?
>
> Carl
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43810FB3.9E8735DB@sympatico.ca...
> > You are going to have to change some angles then. How far off are the
> > two ends from being parallel? Folks use an angle finder or a string
> > plumb bob and protractor to compare them or a small level and
> > protractor.
> >
> > The vib is actually the u-joint jamming and popping loose from the jam.
> > It will eat them fast and damage the bearings and seals at the t-case
> > and pinion.
> >
> > My CJ7 is at the edge and buzzes when run empty. If I put a load on, it
> > runs smooth.
> >
> > Mike
> >
> > Carl wrote:
> >>
> >> Checked all my fasteners... everything was tight as can be. The vibe is
> >> only
> >> really noticeable between 25 and 35mph, after that it smoothes out. I
> >> have
> >> stock shackles, the rear lift is just 3.5" lift springs.
> >>
> >> Any input?
> >>
> >> Carl
> >>
> >> "Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
> >> news:--CdneDdlbLPIh3eRVn-rA@comcast.com...
> >> > The pinion is looks to be at the stock angle of pretty much nill. The
> >> > T-case is the same. I'll check all the bolts and everything.
> >> >
> >> > Thanks Mike.
> >> >
> >> > Carl
> >> >
> >> >
> >> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> >> > news:438093A3.40632F94@sympatico.ca...
> >> >> You need to see what way the new springs set the pinion. It might
> >> >> need
> >> >> to tip down. It will need to tip down if the lift used longer
> >> >> shackles.
> >> >>
> >> >> You are looking for the pinion to be parallel with the t-case
output.
> >> >> So if the T-case output is flat or | , then you want |------| .
If
> >> >> the t-case is tilted down /, then you want /------/ . If you use a
> >> >> double cardan driveshaft, you want to point the rear pinion right at
> >> >> the
> >> >> t-case.
> >> >>
> >> >> I have seen kits for lowering XJ skid plates at one of the online
4x4
> >> >> places. Here is one: http://www.4wd.com/shop/search.asp
> >> >>
> >> >> I would be double checking the nuts and bolts first though.
Something
> >> >> could just have worked loose.
> >> >>
> >> >> Mike
> >> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> >> 88 Cherokee 235 BFG AT's
> >> >> Canadian Off Road Trips Photos: Non members can still view!
> >> >> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> >> >> (More Off Road album links at bottom of the view page)
> >> >>
> >> >> Carl wrote:
> >> >>>
> >> >>> 91 XJ 4.0, D35. 3.5" RE Super-Ride kit w/full rear springs.
> >> >>>
> >> >>> Got my brakes fixed today.. to the tune of $200. Ended up with all
> >> >>> new
> >> >>> steel
> >> >>> lines and a total brake job. Brakes are great now.
> >> >>>
> >> >>> Last night, there was a slight vibe from the rear between 25-35mph.
> >> >>> Today
> >> >>> while driving around looking for my car that was stolen, the vibe
has
> >> >>> increased to 20-50mph, and is much worse. It's more the noise than
> >> >>> the
> >> >>> feeling. I'm thinking rear U-joints? The pinion angle is stock, but
> >> >>> the
> >> >>> driveshaft angle didn't look bad. Will new U-joints cure my
problem?
> >> >>>
> >> >>> I was thinking a T-case drop might be my best bet if the vibe
> >> >>> continues
> >> >>> after new u-joints, but two of the four bolts holding the T-case up
> >> >>> are
> >> >>> studs instead of bolts. :-( Failing the T-case drop, I'll need some
> >> >>> shims to
> >> >>> tip the pinion up a bit. How many degrees for a 3.5" lift? I was
> >> >>> thinking
> >> >>> 2-3?
> >> >>>
> >> >>> What a day...
> >> >>>
> >> >>> Carl
> >> >
> >> >
>
>
11-21-2005, 02:53 AM
#22
Guest
Posts: n/a
Re: Lift nightmare part II
You need to make the two ends parallel, as Mike says. You need to use some
kind of instrument, to measure where they are both pointing, and then bring
them in line with each other. If you don't know what is going on, then
tilting the pinion up or the transfer case down, by guess work, is not going
to solve the problem.
Earle
"Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
news:ZYednSExvrvixhzeRVn-qA@comcast.com...
> I home-brewed a 1" T-case drop today. It helped a little, but the noise is
> worse now on the freeway, nearly gone at low speeds.
>
> What gives?
>
> Carl
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43810FB3.9E8735DB@sympatico.ca...
> > You are going to have to change some angles then. How far off are the
> > two ends from being parallel? Folks use an angle finder or a string
> > plumb bob and protractor to compare them or a small level and
> > protractor.
> >
> > The vib is actually the u-joint jamming and popping loose from the jam.
> > It will eat them fast and damage the bearings and seals at the t-case
> > and pinion.
> >
> > My CJ7 is at the edge and buzzes when run empty. If I put a load on, it
> > runs smooth.
> >
> > Mike
> >
> > Carl wrote:
> >>
> >> Checked all my fasteners... everything was tight as can be. The vibe is
> >> only
> >> really noticeable between 25 and 35mph, after that it smoothes out. I
> >> have
> >> stock shackles, the rear lift is just 3.5" lift springs.
> >>
> >> Any input?
> >>
> >> Carl
> >>
> >> "Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
> >> news:--CdneDdlbLPIh3eRVn-rA@comcast.com...
> >> > The pinion is looks to be at the stock angle of pretty much nill. The
> >> > T-case is the same. I'll check all the bolts and everything.
> >> >
> >> > Thanks Mike.
> >> >
> >> > Carl
> >> >
> >> >
> >> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> >> > news:438093A3.40632F94@sympatico.ca...
> >> >> You need to see what way the new springs set the pinion. It might
> >> >> need
> >> >> to tip down. It will need to tip down if the lift used longer
> >> >> shackles.
> >> >>
> >> >> You are looking for the pinion to be parallel with the t-case
output.
> >> >> So if the T-case output is flat or | , then you want |------| .
If
> >> >> the t-case is tilted down /, then you want /------/ . If you use a
> >> >> double cardan driveshaft, you want to point the rear pinion right at
> >> >> the
> >> >> t-case.
> >> >>
> >> >> I have seen kits for lowering XJ skid plates at one of the online
4x4
> >> >> places. Here is one: http://www.4wd.com/shop/search.asp
> >> >>
> >> >> I would be double checking the nuts and bolts first though.
Something
> >> >> could just have worked loose.
> >> >>
> >> >> Mike
> >> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> >> 88 Cherokee 235 BFG AT's
> >> >> Canadian Off Road Trips Photos: Non members can still view!
> >> >> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> >> >> (More Off Road album links at bottom of the view page)
> >> >>
> >> >> Carl wrote:
> >> >>>
> >> >>> 91 XJ 4.0, D35. 3.5" RE Super-Ride kit w/full rear springs.
> >> >>>
> >> >>> Got my brakes fixed today.. to the tune of $200. Ended up with all
> >> >>> new
> >> >>> steel
> >> >>> lines and a total brake job. Brakes are great now.
> >> >>>
> >> >>> Last night, there was a slight vibe from the rear between 25-35mph.
> >> >>> Today
> >> >>> while driving around looking for my car that was stolen, the vibe
has
> >> >>> increased to 20-50mph, and is much worse. It's more the noise than
> >> >>> the
> >> >>> feeling. I'm thinking rear U-joints? The pinion angle is stock, but
> >> >>> the
> >> >>> driveshaft angle didn't look bad. Will new U-joints cure my
problem?
> >> >>>
> >> >>> I was thinking a T-case drop might be my best bet if the vibe
> >> >>> continues
> >> >>> after new u-joints, but two of the four bolts holding the T-case up
> >> >>> are
> >> >>> studs instead of bolts. :-( Failing the T-case drop, I'll need some
> >> >>> shims to
> >> >>> tip the pinion up a bit. How many degrees for a 3.5" lift? I was
> >> >>> thinking
> >> >>> 2-3?
> >> >>>
> >> >>> What a day...
> >> >>>
> >> >>> Carl
> >> >
> >> >
>
>
kind of instrument, to measure where they are both pointing, and then bring
them in line with each other. If you don't know what is going on, then
tilting the pinion up or the transfer case down, by guess work, is not going
to solve the problem.
Earle
"Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
news:ZYednSExvrvixhzeRVn-qA@comcast.com...
> I home-brewed a 1" T-case drop today. It helped a little, but the noise is
> worse now on the freeway, nearly gone at low speeds.
>
> What gives?
>
> Carl
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:43810FB3.9E8735DB@sympatico.ca...
> > You are going to have to change some angles then. How far off are the
> > two ends from being parallel? Folks use an angle finder or a string
> > plumb bob and protractor to compare them or a small level and
> > protractor.
> >
> > The vib is actually the u-joint jamming and popping loose from the jam.
> > It will eat them fast and damage the bearings and seals at the t-case
> > and pinion.
> >
> > My CJ7 is at the edge and buzzes when run empty. If I put a load on, it
> > runs smooth.
> >
> > Mike
> >
> > Carl wrote:
> >>
> >> Checked all my fasteners... everything was tight as can be. The vibe is
> >> only
> >> really noticeable between 25 and 35mph, after that it smoothes out. I
> >> have
> >> stock shackles, the rear lift is just 3.5" lift springs.
> >>
> >> Any input?
> >>
> >> Carl
> >>
> >> "Carl" <carlsaiyed@REMOVE.hotmail.com> wrote in message
> >> news:--CdneDdlbLPIh3eRVn-rA@comcast.com...
> >> > The pinion is looks to be at the stock angle of pretty much nill. The
> >> > T-case is the same. I'll check all the bolts and everything.
> >> >
> >> > Thanks Mike.
> >> >
> >> > Carl
> >> >
> >> >
> >> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> >> > news:438093A3.40632F94@sympatico.ca...
> >> >> You need to see what way the new springs set the pinion. It might
> >> >> need
> >> >> to tip down. It will need to tip down if the lift used longer
> >> >> shackles.
> >> >>
> >> >> You are looking for the pinion to be parallel with the t-case
output.
> >> >> So if the T-case output is flat or | , then you want |------| .
If
> >> >> the t-case is tilted down /, then you want /------/ . If you use a
> >> >> double cardan driveshaft, you want to point the rear pinion right at
> >> >> the
> >> >> t-case.
> >> >>
> >> >> I have seen kits for lowering XJ skid plates at one of the online
4x4
> >> >> places. Here is one: http://www.4wd.com/shop/search.asp
> >> >>
> >> >> I would be double checking the nuts and bolts first though.
Something
> >> >> could just have worked loose.
> >> >>
> >> >> Mike
> >> >> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >> >> 88 Cherokee 235 BFG AT's
> >> >> Canadian Off Road Trips Photos: Non members can still view!
> >> >> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> >> >> (More Off Road album links at bottom of the view page)
> >> >>
> >> >> Carl wrote:
> >> >>>
> >> >>> 91 XJ 4.0, D35. 3.5" RE Super-Ride kit w/full rear springs.
> >> >>>
> >> >>> Got my brakes fixed today.. to the tune of $200. Ended up with all
> >> >>> new
> >> >>> steel
> >> >>> lines and a total brake job. Brakes are great now.
> >> >>>
> >> >>> Last night, there was a slight vibe from the rear between 25-35mph.
> >> >>> Today
> >> >>> while driving around looking for my car that was stolen, the vibe
has
> >> >>> increased to 20-50mph, and is much worse. It's more the noise than
> >> >>> the
> >> >>> feeling. I'm thinking rear U-joints? The pinion angle is stock, but
> >> >>> the
> >> >>> driveshaft angle didn't look bad. Will new U-joints cure my
problem?
> >> >>>
> >> >>> I was thinking a T-case drop might be my best bet if the vibe
> >> >>> continues
> >> >>> after new u-joints, but two of the four bolts holding the T-case up
> >> >>> are
> >> >>> studs instead of bolts. :-( Failing the T-case drop, I'll need some
> >> >>> shims to
> >> >>> tip the pinion up a bit. How many degrees for a 3.5" lift? I was
> >> >>> thinking
> >> >>> 2-3?
> >> >>>
> >> >>> What a day...
> >> >>>
> >> >>> Carl
> >> >
> >> >
>
>
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