It's got new u-joints. I think the angle of the driveline is too severe for
above 40mph... I have about 8" of lift on a stock front driveline. No t-case
drop.

Carl

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:434BE40C.8D38B44D@sympatico.ca...
> No, the YJ's have the vacuum disconnect so the driveshaft stays put when
> in 2 WD. Same for the CJ's with their manual disconnects and at least
> the first version of the 'new' XJ also have a vacuum disconnect.
>
> Those vibes over 40 in 4 high are not normal. That implies a bad
> u-joint either in the driveshaft or in the axle ends. You should be
> smooth as silk all the way up to at least 70 mph in 4 high.
>
> I use it in both my Jeeps at full highway speed in snow squalls. If I
> am driving along at 65 mph and see snow on the road ahead, I just shift
> into 4 high and keep on truckin'. See dry ahead and shift back to 2
> HI. I always lock my CJ7 up before going on the highway in those kind
> of conditions.
>
> Mike
>
> Carl wrote:
>>
>> My mistake.. is this the same on YJ? I drove on my front shaft for a week
>> after I sprung-over. Terrible vibes above 40mph in 4HI (which was
>> front-drive). No vibes in 2HI (rear drive).
>>
>> Carl
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:434BC4C1.6119F680@sympatico.ca...
>> > He has a TJ, the front shaft turns all the time.
>> >
>> > Mike
>> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> > 88 Cherokee 235 BFG AT's
>> >
>> > Carl wrote:
>> >>
>> >> Depending how high you are, your front driveshaft my vibrate worse.
>> >> The
>> >> front driveshaft should not rotate in 2wd.
>> >>
>> >> Carl
>> >>
>> >> <snowboardripper@hotmail.com> wrote in message
>> >> news:1128996172.251775.195480@g47g2000cwa.googlegr oups.com...
>> >> >I have a small vibration and want to try to solve the problem. It
>> >> >only
>> >> > occurs from 90 to 100km then stops. There is a vibration in the gas
>> >> > pedal and seat. I want to remove the rear drive shaft and take the
>> >> > jeep out to see if this is the problem. Is it safe to drive with
>> >> > out
>> >> > the rear drive shaft - put the jeep TJ 2002 in 4x4 and drive in
>> >> > front
>> >> > wheel drive? I have SYE. If this does not do the trick then I will
>> >> > try the front but this is a lot more work!
>> >> >

 

It's got new u-joints. I think the angle of the driveline is too severe for
above 40mph... I have about 8" of lift on a stock front driveline. No t-case
drop.

Carl

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:434BE40C.8D38B44D@sympatico.ca...
> No, the YJ's have the vacuum disconnect so the driveshaft stays put when
> in 2 WD. Same for the CJ's with their manual disconnects and at least
> the first version of the 'new' XJ also have a vacuum disconnect.
>
> Those vibes over 40 in 4 high are not normal. That implies a bad
> u-joint either in the driveshaft or in the axle ends. You should be
> smooth as silk all the way up to at least 70 mph in 4 high.
>
> I use it in both my Jeeps at full highway speed in snow squalls. If I
> am driving along at 65 mph and see snow on the road ahead, I just shift
> into 4 high and keep on truckin'. See dry ahead and shift back to 2
> HI. I always lock my CJ7 up before going on the highway in those kind
> of conditions.
>
> Mike
>
> Carl wrote:
>>
>> My mistake.. is this the same on YJ? I drove on my front shaft for a week
>> after I sprung-over. Terrible vibes above 40mph in 4HI (which was
>> front-drive). No vibes in 2HI (rear drive).
>>
>> Carl
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:434BC4C1.6119F680@sympatico.ca...
>> > He has a TJ, the front shaft turns all the time.
>> >
>> > Mike
>> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> > 88 Cherokee 235 BFG AT's
>> >
>> > Carl wrote:
>> >>
>> >> Depending how high you are, your front driveshaft my vibrate worse.
>> >> The
>> >> front driveshaft should not rotate in 2wd.
>> >>
>> >> Carl
>> >>
>> >> <snowboardripper@hotmail.com> wrote in message
>> >> news:1128996172.251775.195480@g47g2000cwa.googlegr oups.com...
>> >> >I have a small vibration and want to try to solve the problem. It
>> >> >only
>> >> > occurs from 90 to 100km then stops. There is a vibration in the gas
>> >> > pedal and seat. I want to remove the rear drive shaft and take the
>> >> > jeep out to see if this is the problem. Is it safe to drive with
>> >> > out
>> >> > the rear drive shaft - put the jeep TJ 2002 in 4x4 and drive in
>> >> > front
>> >> > wheel drive? I have SYE. If this does not do the trick then I will
>> >> > try the front but this is a lot more work!
>> >> >

 

I had a small vibration in the gas pedal and steering wheel on my 93 YJ -
replaced both U-joints on the rear axle (relatively inexpensive and easy)
found that just 1 bearing cap was bad,,,, vibration went away.

My recommendation is if you are going to drop the drive shaft, just replace
the u-joints (greasable) and let er rip!


<snowboardripper@hotmail.com> wrote in message
news:1128996172.251775.195480@g47g2000cwa.googlegr oups.com...
>I have a small vibration and want to try to solve the problem. It only
> occurs from 90 to 100km then stops. There is a vibration in the gas
> pedal and seat. I want to remove the rear drive shaft and take the
> jeep out to see if this is the problem. Is it safe to drive with out
> the rear drive shaft - put the jeep TJ 2002 in 4x4 and drive in front
> wheel drive? I have SYE. If this does not do the trick then I will
> try the front but this is a lot more work!
>

 

I had a small vibration in the gas pedal and steering wheel on my 93 YJ -
replaced both U-joints on the rear axle (relatively inexpensive and easy)
found that just 1 bearing cap was bad,,,, vibration went away.

My recommendation is if you are going to drop the drive shaft, just replace
the u-joints (greasable) and let er rip!


<snowboardripper@hotmail.com> wrote in message
news:1128996172.251775.195480@g47g2000cwa.googlegr oups.com...
>I have a small vibration and want to try to solve the problem. It only
> occurs from 90 to 100km then stops. There is a vibration in the gas
> pedal and seat. I want to remove the rear drive shaft and take the
> jeep out to see if this is the problem. Is it safe to drive with out
> the rear drive shaft - put the jeep TJ 2002 in 4x4 and drive in front
> wheel drive? I have SYE. If this does not do the trick then I will
> try the front but this is a lot more work!
>

 

I had a small vibration in the gas pedal and steering wheel on my 93 YJ -
replaced both U-joints on the rear axle (relatively inexpensive and easy)
found that just 1 bearing cap was bad,,,, vibration went away.

My recommendation is if you are going to drop the drive shaft, just replace
the u-joints (greasable) and let er rip!


<snowboardripper@hotmail.com> wrote in message
news:1128996172.251775.195480@g47g2000cwa.googlegr oups.com...
>I have a small vibration and want to try to solve the problem. It only
> occurs from 90 to 100km then stops. There is a vibration in the gas
> pedal and seat. I want to remove the rear drive shaft and take the
> jeep out to see if this is the problem. Is it safe to drive with out
> the rear drive shaft - put the jeep TJ 2002 in 4x4 and drive in front
> wheel drive? I have SYE. If this does not do the trick then I will
> try the front but this is a lot more work!
>