Chain slap NP231
08-23-2004, 10:25 PM
#1
Guest
Posts: n/a
Chain slap NP231
My 99 TJ has been making some interesting noises/vibrations lately. Had it
out on the trails this weekend, and when alternating the clutch/gas
(climbing something, usually) I got a lot of... rattle... I guess you could
call it. The guys from the shop that's been doing the work lately said that
didn't sound good. Eventually they agreed it sounded like "chain slap" from
the transfer case.
They called another guy who knows these x-fer cases inside and out, and he
seemed to think it might just be natural "gear slap" and not a big deal.
UNLESS, he said, the front driveshaft can be rotated "more than just a
little" while in gear. I jacked up the front, put it in gear (4Hi) and
found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
it's hard to determine distance during rotation...
SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
My TJ only has 48k miles on it. I can't believe this would happen so
soon -- and the sound has been there for the past 20 thousand miles. It
ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
succession.
Money is an issue... thanks guys.
Eric
99 TJ SE
out on the trails this weekend, and when alternating the clutch/gas
(climbing something, usually) I got a lot of... rattle... I guess you could
call it. The guys from the shop that's been doing the work lately said that
didn't sound good. Eventually they agreed it sounded like "chain slap" from
the transfer case.
They called another guy who knows these x-fer cases inside and out, and he
seemed to think it might just be natural "gear slap" and not a big deal.
UNLESS, he said, the front driveshaft can be rotated "more than just a
little" while in gear. I jacked up the front, put it in gear (4Hi) and
found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
it's hard to determine distance during rotation...
SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
My TJ only has 48k miles on it. I can't believe this would happen so
soon -- and the sound has been there for the past 20 thousand miles. It
ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
succession.
Money is an issue... thanks guys.
Eric
99 TJ SE
08-25-2004, 04:20 AM
#2
Guest
Posts: n/a
Re: Chain slap NP231
There's play, but it's not going to add to a quarter inch rotation:
http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
on you: http://www.----------.com/BrokenTCase.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Eric wrote:
>
> My 99 TJ has been making some interesting noises/vibrations lately. Had it
> out on the trails this weekend, and when alternating the clutch/gas
> (climbing something, usually) I got a lot of... rattle... I guess you could
> call it. The guys from the shop that's been doing the work lately said that
> didn't sound good. Eventually they agreed it sounded like "chain slap" from
> the transfer case.
>
> They called another guy who knows these x-fer cases inside and out, and he
> seemed to think it might just be natural "gear slap" and not a big deal.
> UNLESS, he said, the front driveshaft can be rotated "more than just a
> little" while in gear. I jacked up the front, put it in gear (4Hi) and
> found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
> it's hard to determine distance during rotation...
>
> SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
> I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
> My TJ only has 48k miles on it. I can't believe this would happen so
> soon -- and the sound has been there for the past 20 thousand miles. It
> ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> succession.
>
> Money is an issue... thanks guys.
>
> Eric
> 99 TJ SE
http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
on you: http://www.----------.com/BrokenTCase.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Eric wrote:
>
> My 99 TJ has been making some interesting noises/vibrations lately. Had it
> out on the trails this weekend, and when alternating the clutch/gas
> (climbing something, usually) I got a lot of... rattle... I guess you could
> call it. The guys from the shop that's been doing the work lately said that
> didn't sound good. Eventually they agreed it sounded like "chain slap" from
> the transfer case.
>
> They called another guy who knows these x-fer cases inside and out, and he
> seemed to think it might just be natural "gear slap" and not a big deal.
> UNLESS, he said, the front driveshaft can be rotated "more than just a
> little" while in gear. I jacked up the front, put it in gear (4Hi) and
> found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
> it's hard to determine distance during rotation...
>
> SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
> I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
> My TJ only has 48k miles on it. I can't believe this would happen so
> soon -- and the sound has been there for the past 20 thousand miles. It
> ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> succession.
>
> Money is an issue... thanks guys.
>
> Eric
> 99 TJ SE
08-25-2004, 04:20 AM
#3
Guest
Posts: n/a
Re: Chain slap NP231
There's play, but it's not going to add to a quarter inch rotation:
http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
on you: http://www.----------.com/BrokenTCase.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Eric wrote:
>
> My 99 TJ has been making some interesting noises/vibrations lately. Had it
> out on the trails this weekend, and when alternating the clutch/gas
> (climbing something, usually) I got a lot of... rattle... I guess you could
> call it. The guys from the shop that's been doing the work lately said that
> didn't sound good. Eventually they agreed it sounded like "chain slap" from
> the transfer case.
>
> They called another guy who knows these x-fer cases inside and out, and he
> seemed to think it might just be natural "gear slap" and not a big deal.
> UNLESS, he said, the front driveshaft can be rotated "more than just a
> little" while in gear. I jacked up the front, put it in gear (4Hi) and
> found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
> it's hard to determine distance during rotation...
>
> SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
> I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
> My TJ only has 48k miles on it. I can't believe this would happen so
> soon -- and the sound has been there for the past 20 thousand miles. It
> ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> succession.
>
> Money is an issue... thanks guys.
>
> Eric
> 99 TJ SE
http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
on you: http://www.----------.com/BrokenTCase.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Eric wrote:
>
> My 99 TJ has been making some interesting noises/vibrations lately. Had it
> out on the trails this weekend, and when alternating the clutch/gas
> (climbing something, usually) I got a lot of... rattle... I guess you could
> call it. The guys from the shop that's been doing the work lately said that
> didn't sound good. Eventually they agreed it sounded like "chain slap" from
> the transfer case.
>
> They called another guy who knows these x-fer cases inside and out, and he
> seemed to think it might just be natural "gear slap" and not a big deal.
> UNLESS, he said, the front driveshaft can be rotated "more than just a
> little" while in gear. I jacked up the front, put it in gear (4Hi) and
> found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
> it's hard to determine distance during rotation...
>
> SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
> I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
> My TJ only has 48k miles on it. I can't believe this would happen so
> soon -- and the sound has been there for the past 20 thousand miles. It
> ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> succession.
>
> Money is an issue... thanks guys.
>
> Eric
> 99 TJ SE
08-25-2004, 04:20 AM
#4
Guest
Posts: n/a
Re: Chain slap NP231
There's play, but it's not going to add to a quarter inch rotation:
http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
on you: http://www.----------.com/BrokenTCase.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Eric wrote:
>
> My 99 TJ has been making some interesting noises/vibrations lately. Had it
> out on the trails this weekend, and when alternating the clutch/gas
> (climbing something, usually) I got a lot of... rattle... I guess you could
> call it. The guys from the shop that's been doing the work lately said that
> didn't sound good. Eventually they agreed it sounded like "chain slap" from
> the transfer case.
>
> They called another guy who knows these x-fer cases inside and out, and he
> seemed to think it might just be natural "gear slap" and not a big deal.
> UNLESS, he said, the front driveshaft can be rotated "more than just a
> little" while in gear. I jacked up the front, put it in gear (4Hi) and
> found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
> it's hard to determine distance during rotation...
>
> SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
> I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
> My TJ only has 48k miles on it. I can't believe this would happen so
> soon -- and the sound has been there for the past 20 thousand miles. It
> ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> succession.
>
> Money is an issue... thanks guys.
>
> Eric
> 99 TJ SE
http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
on you: http://www.----------.com/BrokenTCase.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Eric wrote:
>
> My 99 TJ has been making some interesting noises/vibrations lately. Had it
> out on the trails this weekend, and when alternating the clutch/gas
> (climbing something, usually) I got a lot of... rattle... I guess you could
> call it. The guys from the shop that's been doing the work lately said that
> didn't sound good. Eventually they agreed it sounded like "chain slap" from
> the transfer case.
>
> They called another guy who knows these x-fer cases inside and out, and he
> seemed to think it might just be natural "gear slap" and not a big deal.
> UNLESS, he said, the front driveshaft can be rotated "more than just a
> little" while in gear. I jacked up the front, put it in gear (4Hi) and
> found the front driveshaft rotates between 1/4" and 1/2". That's a guess as
> it's hard to determine distance during rotation...
>
> SO, if it is chain slap (and if so, it sounds pretty bad) what do I do? Do
> I buy a new NP 231 or rebuild this one (adding a tera-low kit, obviously)?
> My TJ only has 48k miles on it. I can't believe this would happen so
> soon -- and the sound has been there for the past 20 thousand miles. It
> ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> succession.
>
> Money is an issue... thanks guys.
>
> Eric
> 99 TJ SE
08-25-2004, 09:38 PM
#5
Guest
Posts: n/a
Re: Chain slap NP231
So what the heck do I do? Is there a way to "fix" it???
Eric
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:412C4BC8.7A4D748F@***.net...
> There's play, but it's not going to add to a quarter inch rotation:
> http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
> on you: http://www.----------.com/BrokenTCase.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Eric wrote:
> >
> > My 99 TJ has been making some interesting noises/vibrations lately. Had
it
> > out on the trails this weekend, and when alternating the clutch/gas
> > (climbing something, usually) I got a lot of... rattle... I guess you
could
> > call it. The guys from the shop that's been doing the work lately said
that
> > didn't sound good. Eventually they agreed it sounded like "chain slap"
from
> > the transfer case.
> >
> > They called another guy who knows these x-fer cases inside and out, and
he
> > seemed to think it might just be natural "gear slap" and not a big deal.
> > UNLESS, he said, the front driveshaft can be rotated "more than just a
> > little" while in gear. I jacked up the front, put it in gear (4Hi) and
> > found the front driveshaft rotates between 1/4" and 1/2". That's a
guess as
> > it's hard to determine distance during rotation...
> >
> > SO, if it is chain slap (and if so, it sounds pretty bad) what do I do?
Do
> > I buy a new NP 231 or rebuild this one (adding a tera-low kit,
obviously)?
> > My TJ only has 48k miles on it. I can't believe this would happen so
> > soon -- and the sound has been there for the past 20 thousand miles. It
> > ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> > succession.
> >
> > Money is an issue... thanks guys.
> >
> > Eric
> > 99 TJ SE
Eric
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:412C4BC8.7A4D748F@***.net...
> There's play, but it's not going to add to a quarter inch rotation:
> http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
> on you: http://www.----------.com/BrokenTCase.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Eric wrote:
> >
> > My 99 TJ has been making some interesting noises/vibrations lately. Had
it
> > out on the trails this weekend, and when alternating the clutch/gas
> > (climbing something, usually) I got a lot of... rattle... I guess you
could
> > call it. The guys from the shop that's been doing the work lately said
that
> > didn't sound good. Eventually they agreed it sounded like "chain slap"
from
> > the transfer case.
> >
> > They called another guy who knows these x-fer cases inside and out, and
he
> > seemed to think it might just be natural "gear slap" and not a big deal.
> > UNLESS, he said, the front driveshaft can be rotated "more than just a
> > little" while in gear. I jacked up the front, put it in gear (4Hi) and
> > found the front driveshaft rotates between 1/4" and 1/2". That's a
guess as
> > it's hard to determine distance during rotation...
> >
> > SO, if it is chain slap (and if so, it sounds pretty bad) what do I do?
Do
> > I buy a new NP 231 or rebuild this one (adding a tera-low kit,
obviously)?
> > My TJ only has 48k miles on it. I can't believe this would happen so
> > soon -- and the sound has been there for the past 20 thousand miles. It
> > ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> > succession.
> >
> > Money is an issue... thanks guys.
> >
> > Eric
> > 99 TJ SE
08-25-2004, 09:38 PM
#6
Guest
Posts: n/a
Re: Chain slap NP231
So what the heck do I do? Is there a way to "fix" it???
Eric
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:412C4BC8.7A4D748F@***.net...
> There's play, but it's not going to add to a quarter inch rotation:
> http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
> on you: http://www.----------.com/BrokenTCase.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Eric wrote:
> >
> > My 99 TJ has been making some interesting noises/vibrations lately. Had
it
> > out on the trails this weekend, and when alternating the clutch/gas
> > (climbing something, usually) I got a lot of... rattle... I guess you
could
> > call it. The guys from the shop that's been doing the work lately said
that
> > didn't sound good. Eventually they agreed it sounded like "chain slap"
from
> > the transfer case.
> >
> > They called another guy who knows these x-fer cases inside and out, and
he
> > seemed to think it might just be natural "gear slap" and not a big deal.
> > UNLESS, he said, the front driveshaft can be rotated "more than just a
> > little" while in gear. I jacked up the front, put it in gear (4Hi) and
> > found the front driveshaft rotates between 1/4" and 1/2". That's a
guess as
> > it's hard to determine distance during rotation...
> >
> > SO, if it is chain slap (and if so, it sounds pretty bad) what do I do?
Do
> > I buy a new NP 231 or rebuild this one (adding a tera-low kit,
obviously)?
> > My TJ only has 48k miles on it. I can't believe this would happen so
> > soon -- and the sound has been there for the past 20 thousand miles. It
> > ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> > succession.
> >
> > Money is an issue... thanks guys.
> >
> > Eric
> > 99 TJ SE
Eric
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:412C4BC8.7A4D748F@***.net...
> There's play, but it's not going to add to a quarter inch rotation:
> http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
> on you: http://www.----------.com/BrokenTCase.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Eric wrote:
> >
> > My 99 TJ has been making some interesting noises/vibrations lately. Had
it
> > out on the trails this weekend, and when alternating the clutch/gas
> > (climbing something, usually) I got a lot of... rattle... I guess you
could
> > call it. The guys from the shop that's been doing the work lately said
that
> > didn't sound good. Eventually they agreed it sounded like "chain slap"
from
> > the transfer case.
> >
> > They called another guy who knows these x-fer cases inside and out, and
he
> > seemed to think it might just be natural "gear slap" and not a big deal.
> > UNLESS, he said, the front driveshaft can be rotated "more than just a
> > little" while in gear. I jacked up the front, put it in gear (4Hi) and
> > found the front driveshaft rotates between 1/4" and 1/2". That's a
guess as
> > it's hard to determine distance during rotation...
> >
> > SO, if it is chain slap (and if so, it sounds pretty bad) what do I do?
Do
> > I buy a new NP 231 or rebuild this one (adding a tera-low kit,
obviously)?
> > My TJ only has 48k miles on it. I can't believe this would happen so
> > soon -- and the sound has been there for the past 20 thousand miles. It
> > ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> > succession.
> >
> > Money is an issue... thanks guys.
> >
> > Eric
> > 99 TJ SE
08-25-2004, 09:38 PM
#7
Guest
Posts: n/a
Re: Chain slap NP231
So what the heck do I do? Is there a way to "fix" it???
Eric
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:412C4BC8.7A4D748F@***.net...
> There's play, but it's not going to add to a quarter inch rotation:
> http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
> on you: http://www.----------.com/BrokenTCase.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Eric wrote:
> >
> > My 99 TJ has been making some interesting noises/vibrations lately. Had
it
> > out on the trails this weekend, and when alternating the clutch/gas
> > (climbing something, usually) I got a lot of... rattle... I guess you
could
> > call it. The guys from the shop that's been doing the work lately said
that
> > didn't sound good. Eventually they agreed it sounded like "chain slap"
from
> > the transfer case.
> >
> > They called another guy who knows these x-fer cases inside and out, and
he
> > seemed to think it might just be natural "gear slap" and not a big deal.
> > UNLESS, he said, the front driveshaft can be rotated "more than just a
> > little" while in gear. I jacked up the front, put it in gear (4Hi) and
> > found the front driveshaft rotates between 1/4" and 1/2". That's a
guess as
> > it's hard to determine distance during rotation...
> >
> > SO, if it is chain slap (and if so, it sounds pretty bad) what do I do?
Do
> > I buy a new NP 231 or rebuild this one (adding a tera-low kit,
obviously)?
> > My TJ only has 48k miles on it. I can't believe this would happen so
> > soon -- and the sound has been there for the past 20 thousand miles. It
> > ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> > succession.
> >
> > Money is an issue... thanks guys.
> >
> > Eric
> > 99 TJ SE
Eric
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:412C4BC8.7A4D748F@***.net...
> There's play, but it's not going to add to a quarter inch rotation:
> http://7slotgrille.com/tech/sye2/newshaft.jpg You don't want it wrap up
> on you: http://www.----------.com/BrokenTCase.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Eric wrote:
> >
> > My 99 TJ has been making some interesting noises/vibrations lately. Had
it
> > out on the trails this weekend, and when alternating the clutch/gas
> > (climbing something, usually) I got a lot of... rattle... I guess you
could
> > call it. The guys from the shop that's been doing the work lately said
that
> > didn't sound good. Eventually they agreed it sounded like "chain slap"
from
> > the transfer case.
> >
> > They called another guy who knows these x-fer cases inside and out, and
he
> > seemed to think it might just be natural "gear slap" and not a big deal.
> > UNLESS, he said, the front driveshaft can be rotated "more than just a
> > little" while in gear. I jacked up the front, put it in gear (4Hi) and
> > found the front driveshaft rotates between 1/4" and 1/2". That's a
guess as
> > it's hard to determine distance during rotation...
> >
> > SO, if it is chain slap (and if so, it sounds pretty bad) what do I do?
Do
> > I buy a new NP 231 or rebuild this one (adding a tera-low kit,
obviously)?
> > My TJ only has 48k miles on it. I can't believe this would happen so
> > soon -- and the sound has been there for the past 20 thousand miles. It
> > ONLY happens in 4Lo and ONLY when I alternate clutch/gas/brake in quick
> > succession.
> >
> > Money is an issue... thanks guys.
> >
> > Eric
> > 99 TJ SE
08-25-2004, 11:58 PM
#8
Guest
Posts: n/a
Re: Chain slap NP231
Replace the chain, was it ever low on fluid? Front drive shaft seal
leak?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Eric wrote:
>
> So what the heck do I do? Is there a way to "fix" it???
>
> Eric
leak?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Eric wrote:
>
> So what the heck do I do? Is there a way to "fix" it???
>
> Eric
08-25-2004, 11:58 PM
#9
Guest
Posts: n/a
Re: Chain slap NP231
Replace the chain, was it ever low on fluid? Front drive shaft seal
leak?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Eric wrote:
>
> So what the heck do I do? Is there a way to "fix" it???
>
> Eric
leak?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Eric wrote:
>
> So what the heck do I do? Is there a way to "fix" it???
>
> Eric
08-25-2004, 11:58 PM
#10
Guest
Posts: n/a
Re: Chain slap NP231
Replace the chain, was it ever low on fluid? Front drive shaft seal
leak?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Eric wrote:
>
> So what the heck do I do? Is there a way to "fix" it???
>
> Eric
leak?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Eric wrote:
>
> So what the heck do I do? Is there a way to "fix" it???
>
> Eric