Finished lift kit, now have drive shaft vibration
02-12-2004, 11:11 AM
#21
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Vibrations are typically caused because of mismatched angles (I was told)
I solved that problem when I was doing a T18/Dana300 - T150/dana20 swap.
I used thicker motor mounts so the engine/tranny/transfercase pointed
downwards a bit more. I had to have a custom made skidplate/crossmember
because of the new driveline. What I did is, make sure that the
imaginary line of the outputshaft of the tranfercase and the imaginary
line "straight out" of the rear differential are close to parallel.
When that's the case then there's (almost) no difference in angle of the
u-joint near the transfercase and u-joint near the rear differential.
when that is done the u-joints cancel out each others vibrations.
The angle the u-joint has to overcome might "still" be larger then
"spec" but not having noticable vibrations keeps the u-joints and other
parts alive longer then having the same driveline angle problems WITH
vibrations. The guy in a shop that build my new driveshafts for after
the conversion told me that (and showed me).
According to him u-joints are supposed to operate between certain
angles, but (according to him) it is really important that the front and
rear ujoints have the same angle. He told me that the vibrations are
caused by [1] driveline angles that are too big. [2] teh difference in
driveline angle between the rear and front should be 180 degrees so that
vibrations can cancle each other out.
Also ... get real good u-joints.
I listened to his advice and my just over 1ft rear driveshaft that has a
pretty steep "angle" never caused any notible vibrations etc with my 4"
lift.
As for the front driveshaft, yes the angles are mismatched there, but
within the specs of the ujoints (rear driveshaft got real short, front
driveshaft got real long) besides I almost never drive "fast" in 4wd anyway.
Ron
btw: a CJ7 is about 12" longer, so you should be able to get rid of
that vibration.
Bob wrote:
> BTW, I would have loved to see what that looked like, you driving
> around with your front end lifted 4" and your rear at stock height.
> Must've been an amusing site. Not to mention interesting to drive...
> ;-)
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message news:<c0f6ea$166d50$1@ID-193866.news.uni-berlin.de>...
>
>>First I put the lift kit (4" superlift kit) on the front end of my 83 CJ7
>>and drove it till the next weekend when I put the rear half on. Everything
>>was fine with only the front on. Now, with the rear on I get a vibration
>>from the drive shaft it seems at around 40 and up. The when I let off the
>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>only heavier, click click click click.... etc.
>>
>>The kit came with a transfer case drop kit but I didn't install it. Others
>>I have talked to said they didn't use the transfer case drop kit.
>>
>>Has anyone else had this problem or can anyone give a comment or help?
>>
>>Thanks,
I solved that problem when I was doing a T18/Dana300 - T150/dana20 swap.
I used thicker motor mounts so the engine/tranny/transfercase pointed
downwards a bit more. I had to have a custom made skidplate/crossmember
because of the new driveline. What I did is, make sure that the
imaginary line of the outputshaft of the tranfercase and the imaginary
line "straight out" of the rear differential are close to parallel.
When that's the case then there's (almost) no difference in angle of the
u-joint near the transfercase and u-joint near the rear differential.
when that is done the u-joints cancel out each others vibrations.
The angle the u-joint has to overcome might "still" be larger then
"spec" but not having noticable vibrations keeps the u-joints and other
parts alive longer then having the same driveline angle problems WITH
vibrations. The guy in a shop that build my new driveshafts for after
the conversion told me that (and showed me).
According to him u-joints are supposed to operate between certain
angles, but (according to him) it is really important that the front and
rear ujoints have the same angle. He told me that the vibrations are
caused by [1] driveline angles that are too big. [2] teh difference in
driveline angle between the rear and front should be 180 degrees so that
vibrations can cancle each other out.
Also ... get real good u-joints.
I listened to his advice and my just over 1ft rear driveshaft that has a
pretty steep "angle" never caused any notible vibrations etc with my 4"
lift.
As for the front driveshaft, yes the angles are mismatched there, but
within the specs of the ujoints (rear driveshaft got real short, front
driveshaft got real long) besides I almost never drive "fast" in 4wd anyway.
Ron
btw: a CJ7 is about 12" longer, so you should be able to get rid of
that vibration.
Bob wrote:
> BTW, I would have loved to see what that looked like, you driving
> around with your front end lifted 4" and your rear at stock height.
> Must've been an amusing site. Not to mention interesting to drive...
> ;-)
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message news:<c0f6ea$166d50$1@ID-193866.news.uni-berlin.de>...
>
>>First I put the lift kit (4" superlift kit) on the front end of my 83 CJ7
>>and drove it till the next weekend when I put the rear half on. Everything
>>was fine with only the front on. Now, with the rear on I get a vibration
>>from the drive shaft it seems at around 40 and up. The when I let off the
>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>only heavier, click click click click.... etc.
>>
>>The kit came with a transfer case drop kit but I didn't install it. Others
>>I have talked to said they didn't use the transfer case drop kit.
>>
>>Has anyone else had this problem or can anyone give a comment or help?
>>
>>Thanks,
02-12-2004, 11:11 AM
#22
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Vibrations are typically caused because of mismatched angles (I was told)
I solved that problem when I was doing a T18/Dana300 - T150/dana20 swap.
I used thicker motor mounts so the engine/tranny/transfercase pointed
downwards a bit more. I had to have a custom made skidplate/crossmember
because of the new driveline. What I did is, make sure that the
imaginary line of the outputshaft of the tranfercase and the imaginary
line "straight out" of the rear differential are close to parallel.
When that's the case then there's (almost) no difference in angle of the
u-joint near the transfercase and u-joint near the rear differential.
when that is done the u-joints cancel out each others vibrations.
The angle the u-joint has to overcome might "still" be larger then
"spec" but not having noticable vibrations keeps the u-joints and other
parts alive longer then having the same driveline angle problems WITH
vibrations. The guy in a shop that build my new driveshafts for after
the conversion told me that (and showed me).
According to him u-joints are supposed to operate between certain
angles, but (according to him) it is really important that the front and
rear ujoints have the same angle. He told me that the vibrations are
caused by [1] driveline angles that are too big. [2] teh difference in
driveline angle between the rear and front should be 180 degrees so that
vibrations can cancle each other out.
Also ... get real good u-joints.
I listened to his advice and my just over 1ft rear driveshaft that has a
pretty steep "angle" never caused any notible vibrations etc with my 4"
lift.
As for the front driveshaft, yes the angles are mismatched there, but
within the specs of the ujoints (rear driveshaft got real short, front
driveshaft got real long) besides I almost never drive "fast" in 4wd anyway.
Ron
btw: a CJ7 is about 12" longer, so you should be able to get rid of
that vibration.
Bob wrote:
> BTW, I would have loved to see what that looked like, you driving
> around with your front end lifted 4" and your rear at stock height.
> Must've been an amusing site. Not to mention interesting to drive...
> ;-)
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message news:<c0f6ea$166d50$1@ID-193866.news.uni-berlin.de>...
>
>>First I put the lift kit (4" superlift kit) on the front end of my 83 CJ7
>>and drove it till the next weekend when I put the rear half on. Everything
>>was fine with only the front on. Now, with the rear on I get a vibration
>>from the drive shaft it seems at around 40 and up. The when I let off the
>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>only heavier, click click click click.... etc.
>>
>>The kit came with a transfer case drop kit but I didn't install it. Others
>>I have talked to said they didn't use the transfer case drop kit.
>>
>>Has anyone else had this problem or can anyone give a comment or help?
>>
>>Thanks,
I solved that problem when I was doing a T18/Dana300 - T150/dana20 swap.
I used thicker motor mounts so the engine/tranny/transfercase pointed
downwards a bit more. I had to have a custom made skidplate/crossmember
because of the new driveline. What I did is, make sure that the
imaginary line of the outputshaft of the tranfercase and the imaginary
line "straight out" of the rear differential are close to parallel.
When that's the case then there's (almost) no difference in angle of the
u-joint near the transfercase and u-joint near the rear differential.
when that is done the u-joints cancel out each others vibrations.
The angle the u-joint has to overcome might "still" be larger then
"spec" but not having noticable vibrations keeps the u-joints and other
parts alive longer then having the same driveline angle problems WITH
vibrations. The guy in a shop that build my new driveshafts for after
the conversion told me that (and showed me).
According to him u-joints are supposed to operate between certain
angles, but (according to him) it is really important that the front and
rear ujoints have the same angle. He told me that the vibrations are
caused by [1] driveline angles that are too big. [2] teh difference in
driveline angle between the rear and front should be 180 degrees so that
vibrations can cancle each other out.
Also ... get real good u-joints.
I listened to his advice and my just over 1ft rear driveshaft that has a
pretty steep "angle" never caused any notible vibrations etc with my 4"
lift.
As for the front driveshaft, yes the angles are mismatched there, but
within the specs of the ujoints (rear driveshaft got real short, front
driveshaft got real long) besides I almost never drive "fast" in 4wd anyway.
Ron
btw: a CJ7 is about 12" longer, so you should be able to get rid of
that vibration.
Bob wrote:
> BTW, I would have loved to see what that looked like, you driving
> around with your front end lifted 4" and your rear at stock height.
> Must've been an amusing site. Not to mention interesting to drive...
> ;-)
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message news:<c0f6ea$166d50$1@ID-193866.news.uni-berlin.de>...
>
>>First I put the lift kit (4" superlift kit) on the front end of my 83 CJ7
>>and drove it till the next weekend when I put the rear half on. Everything
>>was fine with only the front on. Now, with the rear on I get a vibration
>>from the drive shaft it seems at around 40 and up. The when I let off the
>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>only heavier, click click click click.... etc.
>>
>>The kit came with a transfer case drop kit but I didn't install it. Others
>>I have talked to said they didn't use the transfer case drop kit.
>>
>>Has anyone else had this problem or can anyone give a comment or help?
>>
>>Thanks,
02-12-2004, 11:17 AM
#23
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
If the clicking were the U-Joints, wouldn't I hear it all the time and not
only when I come down from 40 + mph?
I recently installed the U-Joint closer to the transfer case, about 4 months
ago.
I'll install the transfer case drop kit and see what that gets me.
Thanks,
Bill
"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20040212095433.11385.00001820@mb-m05.aol.com...
> Bill O wrote:
>
> >when I let off the
> >gas I hear a noise like a 10 speed bike would make when you are coasting
> >only heavier, click click click click.... etc.
> >
> >The kit came with a transfer case drop kit but I didn't install it.
>
>
> The clicking you hear is the sound of your driveshaft ujoints. They have
worn
> in at a particular angle and are now running at a greater angle. Be sure
they
> are freshly lubed. The clicking may go away as the joints wear at the new
> angle, however they are likely to fail at the most inopportune moment. If
I
> were you, I would replace them.
>
> The vibrations at 40 mph are caused by the now incorrect driveline angle.
> Install the transfer case drop.
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com
only when I come down from 40 + mph?
I recently installed the U-Joint closer to the transfer case, about 4 months
ago.
I'll install the transfer case drop kit and see what that gets me.
Thanks,
Bill
"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20040212095433.11385.00001820@mb-m05.aol.com...
> Bill O wrote:
>
> >when I let off the
> >gas I hear a noise like a 10 speed bike would make when you are coasting
> >only heavier, click click click click.... etc.
> >
> >The kit came with a transfer case drop kit but I didn't install it.
>
>
> The clicking you hear is the sound of your driveshaft ujoints. They have
worn
> in at a particular angle and are now running at a greater angle. Be sure
they
> are freshly lubed. The clicking may go away as the joints wear at the new
> angle, however they are likely to fail at the most inopportune moment. If
I
> were you, I would replace them.
>
> The vibrations at 40 mph are caused by the now incorrect driveline angle.
> Install the transfer case drop.
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com
02-12-2004, 11:17 AM
#24
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
If the clicking were the U-Joints, wouldn't I hear it all the time and not
only when I come down from 40 + mph?
I recently installed the U-Joint closer to the transfer case, about 4 months
ago.
I'll install the transfer case drop kit and see what that gets me.
Thanks,
Bill
"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20040212095433.11385.00001820@mb-m05.aol.com...
> Bill O wrote:
>
> >when I let off the
> >gas I hear a noise like a 10 speed bike would make when you are coasting
> >only heavier, click click click click.... etc.
> >
> >The kit came with a transfer case drop kit but I didn't install it.
>
>
> The clicking you hear is the sound of your driveshaft ujoints. They have
worn
> in at a particular angle and are now running at a greater angle. Be sure
they
> are freshly lubed. The clicking may go away as the joints wear at the new
> angle, however they are likely to fail at the most inopportune moment. If
I
> were you, I would replace them.
>
> The vibrations at 40 mph are caused by the now incorrect driveline angle.
> Install the transfer case drop.
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com
only when I come down from 40 + mph?
I recently installed the U-Joint closer to the transfer case, about 4 months
ago.
I'll install the transfer case drop kit and see what that gets me.
Thanks,
Bill
"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20040212095433.11385.00001820@mb-m05.aol.com...
> Bill O wrote:
>
> >when I let off the
> >gas I hear a noise like a 10 speed bike would make when you are coasting
> >only heavier, click click click click.... etc.
> >
> >The kit came with a transfer case drop kit but I didn't install it.
>
>
> The clicking you hear is the sound of your driveshaft ujoints. They have
worn
> in at a particular angle and are now running at a greater angle. Be sure
they
> are freshly lubed. The clicking may go away as the joints wear at the new
> angle, however they are likely to fail at the most inopportune moment. If
I
> were you, I would replace them.
>
> The vibrations at 40 mph are caused by the now incorrect driveline angle.
> Install the transfer case drop.
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com
02-12-2004, 11:17 AM
#25
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
If the clicking were the U-Joints, wouldn't I hear it all the time and not
only when I come down from 40 + mph?
I recently installed the U-Joint closer to the transfer case, about 4 months
ago.
I'll install the transfer case drop kit and see what that gets me.
Thanks,
Bill
"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20040212095433.11385.00001820@mb-m05.aol.com...
> Bill O wrote:
>
> >when I let off the
> >gas I hear a noise like a 10 speed bike would make when you are coasting
> >only heavier, click click click click.... etc.
> >
> >The kit came with a transfer case drop kit but I didn't install it.
>
>
> The clicking you hear is the sound of your driveshaft ujoints. They have
worn
> in at a particular angle and are now running at a greater angle. Be sure
they
> are freshly lubed. The clicking may go away as the joints wear at the new
> angle, however they are likely to fail at the most inopportune moment. If
I
> were you, I would replace them.
>
> The vibrations at 40 mph are caused by the now incorrect driveline angle.
> Install the transfer case drop.
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com
only when I come down from 40 + mph?
I recently installed the U-Joint closer to the transfer case, about 4 months
ago.
I'll install the transfer case drop kit and see what that gets me.
Thanks,
Bill
"Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
news:20040212095433.11385.00001820@mb-m05.aol.com...
> Bill O wrote:
>
> >when I let off the
> >gas I hear a noise like a 10 speed bike would make when you are coasting
> >only heavier, click click click click.... etc.
> >
> >The kit came with a transfer case drop kit but I didn't install it.
>
>
> The clicking you hear is the sound of your driveshaft ujoints. They have
worn
> in at a particular angle and are now running at a greater angle. Be sure
they
> are freshly lubed. The clicking may go away as the joints wear at the new
> angle, however they are likely to fail at the most inopportune moment. If
I
> were you, I would replace them.
>
> The vibrations at 40 mph are caused by the now incorrect driveline angle.
> Install the transfer case drop.
>
> Robert Bills
> KG6LMV
> Orange County CA
>
> http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
> http://www.RobertBills.com
02-12-2004, 11:18 AM
#26
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Is not the SYE kit for a automatic tranny or not needed for a CJ7? Please
correct me if I'm wrong.
"Bert Boks" <tandartsbus@hotmail.com> wrote in message
news:402b6090$0$139$e4fe514c@dreader7.news.xs4all. nl...
> I had exactly the same problem. Only I didnot know where to put them 6
large
> shims I got left.....
> After I dropped the transfer case with those Shims, the problem was gone.
>
> There is another solution to that problem, the Slip Yoke Eliminator Kit.
It
> helps to give you ground clearence, but it will cost you an arm and a leg.
>
>
> --
> --
> Greetings from the Netherlands,
>
> Bert
>
>
> "William Oliveri" <wuji@bigvalley.net> schreef in bericht
> news:c0f6ea$166d50$1@ID-193866.news.uni-berlin.de...
> > First I put the lift kit (4" superlift kit) on the front end of my 83
CJ7
> > and drove it till the next weekend when I put the rear half on.
> Everything
> > was fine with only the front on. Now, with the rear on I get a
vibration
> > from the drive shaft it seems at around 40 and up. The when I let off
the
> > gas I hear a noise like a 10 speed bike would make when you are coasting
> > only heavier, click click click click.... etc.
> >
> > The kit came with a transfer case drop kit but I didn't install it.
> Others
> > I have talked to said they didn't use the transfer case drop kit.
> >
> > Has anyone else had this problem or can anyone give a comment or help?
> >
> > Thanks,
> >
> >
>
>
correct me if I'm wrong.
"Bert Boks" <tandartsbus@hotmail.com> wrote in message
news:402b6090$0$139$e4fe514c@dreader7.news.xs4all. nl...
> I had exactly the same problem. Only I didnot know where to put them 6
large
> shims I got left.....
> After I dropped the transfer case with those Shims, the problem was gone.
>
> There is another solution to that problem, the Slip Yoke Eliminator Kit.
It
> helps to give you ground clearence, but it will cost you an arm and a leg.
>
>
> --
> --
> Greetings from the Netherlands,
>
> Bert
>
>
> "William Oliveri" <wuji@bigvalley.net> schreef in bericht
> news:c0f6ea$166d50$1@ID-193866.news.uni-berlin.de...
> > First I put the lift kit (4" superlift kit) on the front end of my 83
CJ7
> > and drove it till the next weekend when I put the rear half on.
> Everything
> > was fine with only the front on. Now, with the rear on I get a
vibration
> > from the drive shaft it seems at around 40 and up. The when I let off
the
> > gas I hear a noise like a 10 speed bike would make when you are coasting
> > only heavier, click click click click.... etc.
> >
> > The kit came with a transfer case drop kit but I didn't install it.
> Others
> > I have talked to said they didn't use the transfer case drop kit.
> >
> > Has anyone else had this problem or can anyone give a comment or help?
> >
> > Thanks,
> >
> >
>
>
02-12-2004, 11:18 AM
#27
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Is not the SYE kit for a automatic tranny or not needed for a CJ7? Please
correct me if I'm wrong.
"Bert Boks" <tandartsbus@hotmail.com> wrote in message
news:402b6090$0$139$e4fe514c@dreader7.news.xs4all. nl...
> I had exactly the same problem. Only I didnot know where to put them 6
large
> shims I got left.....
> After I dropped the transfer case with those Shims, the problem was gone.
>
> There is another solution to that problem, the Slip Yoke Eliminator Kit.
It
> helps to give you ground clearence, but it will cost you an arm and a leg.
>
>
> --
> --
> Greetings from the Netherlands,
>
> Bert
>
>
> "William Oliveri" <wuji@bigvalley.net> schreef in bericht
> news:c0f6ea$166d50$1@ID-193866.news.uni-berlin.de...
> > First I put the lift kit (4" superlift kit) on the front end of my 83
CJ7
> > and drove it till the next weekend when I put the rear half on.
> Everything
> > was fine with only the front on. Now, with the rear on I get a
vibration
> > from the drive shaft it seems at around 40 and up. The when I let off
the
> > gas I hear a noise like a 10 speed bike would make when you are coasting
> > only heavier, click click click click.... etc.
> >
> > The kit came with a transfer case drop kit but I didn't install it.
> Others
> > I have talked to said they didn't use the transfer case drop kit.
> >
> > Has anyone else had this problem or can anyone give a comment or help?
> >
> > Thanks,
> >
> >
>
>
correct me if I'm wrong.
"Bert Boks" <tandartsbus@hotmail.com> wrote in message
news:402b6090$0$139$e4fe514c@dreader7.news.xs4all. nl...
> I had exactly the same problem. Only I didnot know where to put them 6
large
> shims I got left.....
> After I dropped the transfer case with those Shims, the problem was gone.
>
> There is another solution to that problem, the Slip Yoke Eliminator Kit.
It
> helps to give you ground clearence, but it will cost you an arm and a leg.
>
>
> --
> --
> Greetings from the Netherlands,
>
> Bert
>
>
> "William Oliveri" <wuji@bigvalley.net> schreef in bericht
> news:c0f6ea$166d50$1@ID-193866.news.uni-berlin.de...
> > First I put the lift kit (4" superlift kit) on the front end of my 83
CJ7
> > and drove it till the next weekend when I put the rear half on.
> Everything
> > was fine with only the front on. Now, with the rear on I get a
vibration
> > from the drive shaft it seems at around 40 and up. The when I let off
the
> > gas I hear a noise like a 10 speed bike would make when you are coasting
> > only heavier, click click click click.... etc.
> >
> > The kit came with a transfer case drop kit but I didn't install it.
> Others
> > I have talked to said they didn't use the transfer case drop kit.
> >
> > Has anyone else had this problem or can anyone give a comment or help?
> >
> > Thanks,
> >
> >
>
>
02-12-2004, 11:18 AM
#28
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Is not the SYE kit for a automatic tranny or not needed for a CJ7? Please
correct me if I'm wrong.
"Bert Boks" <tandartsbus@hotmail.com> wrote in message
news:402b6090$0$139$e4fe514c@dreader7.news.xs4all. nl...
> I had exactly the same problem. Only I didnot know where to put them 6
large
> shims I got left.....
> After I dropped the transfer case with those Shims, the problem was gone.
>
> There is another solution to that problem, the Slip Yoke Eliminator Kit.
It
> helps to give you ground clearence, but it will cost you an arm and a leg.
>
>
> --
> --
> Greetings from the Netherlands,
>
> Bert
>
>
> "William Oliveri" <wuji@bigvalley.net> schreef in bericht
> news:c0f6ea$166d50$1@ID-193866.news.uni-berlin.de...
> > First I put the lift kit (4" superlift kit) on the front end of my 83
CJ7
> > and drove it till the next weekend when I put the rear half on.
> Everything
> > was fine with only the front on. Now, with the rear on I get a
vibration
> > from the drive shaft it seems at around 40 and up. The when I let off
the
> > gas I hear a noise like a 10 speed bike would make when you are coasting
> > only heavier, click click click click.... etc.
> >
> > The kit came with a transfer case drop kit but I didn't install it.
> Others
> > I have talked to said they didn't use the transfer case drop kit.
> >
> > Has anyone else had this problem or can anyone give a comment or help?
> >
> > Thanks,
> >
> >
>
>
correct me if I'm wrong.
"Bert Boks" <tandartsbus@hotmail.com> wrote in message
news:402b6090$0$139$e4fe514c@dreader7.news.xs4all. nl...
> I had exactly the same problem. Only I didnot know where to put them 6
large
> shims I got left.....
> After I dropped the transfer case with those Shims, the problem was gone.
>
> There is another solution to that problem, the Slip Yoke Eliminator Kit.
It
> helps to give you ground clearence, but it will cost you an arm and a leg.
>
>
> --
> --
> Greetings from the Netherlands,
>
> Bert
>
>
> "William Oliveri" <wuji@bigvalley.net> schreef in bericht
> news:c0f6ea$166d50$1@ID-193866.news.uni-berlin.de...
> > First I put the lift kit (4" superlift kit) on the front end of my 83
CJ7
> > and drove it till the next weekend when I put the rear half on.
> Everything
> > was fine with only the front on. Now, with the rear on I get a
vibration
> > from the drive shaft it seems at around 40 and up. The when I let off
the
> > gas I hear a noise like a 10 speed bike would make when you are coasting
> > only heavier, click click click click.... etc.
> >
> > The kit came with a transfer case drop kit but I didn't install it.
> Others
> > I have talked to said they didn't use the transfer case drop kit.
> >
> > Has anyone else had this problem or can anyone give a comment or help?
> >
> > Thanks,
> >
> >
>
>
02-12-2004, 11:26 AM
#29
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Well vibration is a frequency thing. So it might get worse and better
at different speeds. Things that vibrate have an "eigen frequency" that
makes them vibrate/move pretty violant at certain frequencies.
Check the driveshaft for missing balancing weights. (or have a driveline
shop balance your driveshaft)
isn't the driveshaft hitting anything ?
Ron
William Oliveri wrote:
> If the clicking were the U-Joints, wouldn't I hear it all the time and not
> only when I come down from 40 + mph?
>
> I recently installed the U-Joint closer to the transfer case, about 4 months
> ago.
>
>
> I'll install the transfer case drop kit and see what that gets me.
>
> Thanks,
>
> Bill
>
>
>
> "Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
> news:20040212095433.11385.00001820@mb-m05.aol.com...
>
>>Bill O wrote:
>>
>>
>>>when I let off the
>>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>>only heavier, click click click click.... etc.
>>>
>>>The kit came with a transfer case drop kit but I didn't install it.
>>
>>
>>The clicking you hear is the sound of your driveshaft ujoints. They have
>
> worn
>
>>in at a particular angle and are now running at a greater angle. Be sure
>
> they
>
>>are freshly lubed. The clicking may go away as the joints wear at the new
>>angle, however they are likely to fail at the most inopportune moment. If
>
> I
>
>>were you, I would replace them.
>>
>>The vibrations at 40 mph are caused by the now incorrect driveline angle.
>>Install the transfer case drop.
>>
>>Robert Bills
>>KG6LMV
>>Orange County CA
>>
>>http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
>>http://www.RobertBills.com
>
>
>
at different speeds. Things that vibrate have an "eigen frequency" that
makes them vibrate/move pretty violant at certain frequencies.
Check the driveshaft for missing balancing weights. (or have a driveline
shop balance your driveshaft)
isn't the driveshaft hitting anything ?
Ron
William Oliveri wrote:
> If the clicking were the U-Joints, wouldn't I hear it all the time and not
> only when I come down from 40 + mph?
>
> I recently installed the U-Joint closer to the transfer case, about 4 months
> ago.
>
>
> I'll install the transfer case drop kit and see what that gets me.
>
> Thanks,
>
> Bill
>
>
>
> "Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
> news:20040212095433.11385.00001820@mb-m05.aol.com...
>
>>Bill O wrote:
>>
>>
>>>when I let off the
>>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>>only heavier, click click click click.... etc.
>>>
>>>The kit came with a transfer case drop kit but I didn't install it.
>>
>>
>>The clicking you hear is the sound of your driveshaft ujoints. They have
>
> worn
>
>>in at a particular angle and are now running at a greater angle. Be sure
>
> they
>
>>are freshly lubed. The clicking may go away as the joints wear at the new
>>angle, however they are likely to fail at the most inopportune moment. If
>
> I
>
>>were you, I would replace them.
>>
>>The vibrations at 40 mph are caused by the now incorrect driveline angle.
>>Install the transfer case drop.
>>
>>Robert Bills
>>KG6LMV
>>Orange County CA
>>
>>http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
>>http://www.RobertBills.com
>
>
>
02-12-2004, 11:26 AM
#30
Guest
Posts: n/a
Re: Finished lift kit, now have drive shaft vibration
Well vibration is a frequency thing. So it might get worse and better
at different speeds. Things that vibrate have an "eigen frequency" that
makes them vibrate/move pretty violant at certain frequencies.
Check the driveshaft for missing balancing weights. (or have a driveline
shop balance your driveshaft)
isn't the driveshaft hitting anything ?
Ron
William Oliveri wrote:
> If the clicking were the U-Joints, wouldn't I hear it all the time and not
> only when I come down from 40 + mph?
>
> I recently installed the U-Joint closer to the transfer case, about 4 months
> ago.
>
>
> I'll install the transfer case drop kit and see what that gets me.
>
> Thanks,
>
> Bill
>
>
>
> "Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
> news:20040212095433.11385.00001820@mb-m05.aol.com...
>
>>Bill O wrote:
>>
>>
>>>when I let off the
>>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>>only heavier, click click click click.... etc.
>>>
>>>The kit came with a transfer case drop kit but I didn't install it.
>>
>>
>>The clicking you hear is the sound of your driveshaft ujoints. They have
>
> worn
>
>>in at a particular angle and are now running at a greater angle. Be sure
>
> they
>
>>are freshly lubed. The clicking may go away as the joints wear at the new
>>angle, however they are likely to fail at the most inopportune moment. If
>
> I
>
>>were you, I would replace them.
>>
>>The vibrations at 40 mph are caused by the now incorrect driveline angle.
>>Install the transfer case drop.
>>
>>Robert Bills
>>KG6LMV
>>Orange County CA
>>
>>http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
>>http://www.RobertBills.com
>
>
>
at different speeds. Things that vibrate have an "eigen frequency" that
makes them vibrate/move pretty violant at certain frequencies.
Check the driveshaft for missing balancing weights. (or have a driveline
shop balance your driveshaft)
isn't the driveshaft hitting anything ?
Ron
William Oliveri wrote:
> If the clicking were the U-Joints, wouldn't I hear it all the time and not
> only when I come down from 40 + mph?
>
> I recently installed the U-Joint closer to the transfer case, about 4 months
> ago.
>
>
> I'll install the transfer case drop kit and see what that gets me.
>
> Thanks,
>
> Bill
>
>
>
> "Robert Bills" <rdbillsjr@aol.comxxxxxxxx> wrote in message
> news:20040212095433.11385.00001820@mb-m05.aol.com...
>
>>Bill O wrote:
>>
>>
>>>when I let off the
>>>gas I hear a noise like a 10 speed bike would make when you are coasting
>>>only heavier, click click click click.... etc.
>>>
>>>The kit came with a transfer case drop kit but I didn't install it.
>>
>>
>>The clicking you hear is the sound of your driveshaft ujoints. They have
>
> worn
>
>>in at a particular angle and are now running at a greater angle. Be sure
>
> they
>
>>are freshly lubed. The clicking may go away as the joints wear at the new
>>angle, however they are likely to fail at the most inopportune moment. If
>
> I
>
>>were you, I would replace them.
>>
>>The vibrations at 40 mph are caused by the now incorrect driveline angle.
>>Install the transfer case drop.
>>
>>Robert Bills
>>KG6LMV
>>Orange County CA
>>
>>http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
>>http://www.RobertBills.com
>
>
>
