For all the people with or without an sye
#1
Member
Thread Starter
Join Date: Feb 2018
Posts: 111
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee(SJ)
For all the people with or without an sye
just curious wanted to get a poll going on what Jeep you have with specs (year, transfer case, axles, engine), and what lift you have and whether or not you had any vibrations and if you needed an sye for the vibrations? Or what else you did (t case drop, shims etc) to combat the vibration. I’m thinking of lifting my xj to 4.5 and am curious if I’m going to need a sye or not. I’m ok with minimal vibrations but concerned it may be more than that and getting a sye/ cv drive shaft ($750) or a hack and tap with a custom drive shaft ($400) for my np242 is definitely an added cost that’s going to be tough to afford with the lift.
#2
Seasoned Member
98', 242,30/ 8.25, first lift on it was 3.5 ", vibes were so bad i pulled the rear driveshaft off and drove it in front wheel drive until i soon did the hack & tap w/ a new cv driveshaft. like magic it was as smooth as a stock xj. used the hack & tap for 4 yrs w/ no problems at all until i recently installed a tj ruby 241.
#3
Seasoned Member
I have a SYE but have not installed it yet. I had pretty good vibes with a 3.5 in. lift that netted me 4 to 5 in. in the back at first that has settled a lot and very minimal vibes now. My suggestion would be to load the back up with as much weight as you can for a while, it will settle. What helped me is that mine is not a DD. I’m still going with the SYE but not until I do the no lift shackle boxes and I guess new shackles. Which is another suggestion I have is go with less lift than you want in the back then do shackle relocators, just sayin.
#4
Member
Thread Starter
Join Date: Feb 2018
Posts: 111
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee(SJ)
98', 242,30/ 8.25, first lift on it was 3.5 ", vibes were so bad i pulled the rear driveshaft off and drove it in front wheel drive until i soon did the hack & tap w/ a new cv driveshaft. like magic it was as smooth as a stock xj. used the hack & tap for 4 yrs w/ no problems at all until i recently installed a tj ruby 241.
#5
Member
Join Date: Feb 2014
Location: Ontario
Posts: 182
Likes: 0
Received 3 Likes
on
2 Posts
Year: 1989
Model: Cherokee
Engine: 4.0L inline 6
1996 auto np242 c8.25 3" lift stock rear shaft needed t case drop.
This lift went in with new u joints and had vibrations on acceleration and deceleration unless it was full of gas and tools. T case drop cured the vibe. I did not measure the actual lift amount when new (2012?) but I think it has settled and I could remove the drop.
1989 auto np231 d35 6.5" lift stock rear driveshaft with t case drop. Worked fine. No vibes.
Actual lift measures 8" over stock
Changed to manual, np231 with sye, ford 8.8 rear and used 33" collapsed length front driveshaft from 1980 chev 1/2 ton.
This lift went in with new u joints and had vibrations on acceleration and deceleration unless it was full of gas and tools. T case drop cured the vibe. I did not measure the actual lift amount when new (2012?) but I think it has settled and I could remove the drop.
1989 auto np231 d35 6.5" lift stock rear driveshaft with t case drop. Worked fine. No vibes.
Actual lift measures 8" over stock
Changed to manual, np231 with sye, ford 8.8 rear and used 33" collapsed length front driveshaft from 1980 chev 1/2 ton.
#6
CF Veteran
'88 3.5" lift with a swapped c8.25 rear and HP30 front. Just running the Rusty's HD crossmember that gives a 1" drop over stock while maintaining stock clearance. I have a SYE Tcase sitting for when I do swap over but no vibes as is.
#7
CF Veteran
Join Date: Feb 2016
Location: Northern New Mexico
Posts: 3,683
Likes: 0
Received 7 Likes
on
6 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
just curious wanted to get a poll going on what Jeep you have with specs (year, transfer case, axles, engine), and what lift you have and whether or not you had any vibrations and if you needed an sye for the vibrations? Or what else you did (t case drop, shims etc) to combat the vibration. I’m thinking of lifting my xj to 4.5 and am curious if I’m going to need a sye or not. I’m ok with minimal vibrations but concerned it may be more than that and getting a sye/ cv drive shaft ($750) or a hack and tap with a custom drive shaft ($400) for my np242 is definitely an added cost that’s going to be tough to afford with the lift.
Trending Topics
#8
CF Veteran
Join Date: Jun 2016
Location: Santa Clarita California
Posts: 2,138
Likes: 0
Received 277 Likes
on
243 Posts
Year: 2001
Model: Cherokee (XJ)
Engine: 4.0L
I used this hack an tap and it uses a stock front drive shaft . https://www.ironrockoffroad.com/prod...nator-kit.html
It is simple to install it only took me about 3 hours and that includes a few beers .
I have a 4.5" lift . so now my xj uses the same drive shaft front and rear .
It is simple to install it only took me about 3 hours and that includes a few beers .
I have a 4.5" lift . so now my xj uses the same drive shaft front and rear .
#9
Member
Thread Starter
Join Date: Feb 2018
Posts: 111
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee(SJ)
I used this hack an tap and it uses a stock front drive shaft . https://www.ironrockoffroad.com/prod...nator-kit.html
It is simple to install it only took me about 3 hours and that includes a few beers .
I have a 4.5" lift . so now my xj uses the same drive shaft front and rear .
It is simple to install it only took me about 3 hours and that includes a few beers .
I have a 4.5" lift . so now my xj uses the same drive shaft front and rear .
#10
CF Veteran
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,679
Likes: 0
Received 15 Likes
on
13 Posts
Year: 1990
Model: Cherokee
Engine: 4.0
PORC SYE from Amazon and front XJ shaft, ~$200 total. Took me 3-4 hours to install with basic tools. Where are you getting $750?!
I'm at 5" of lift w/ 8.8 rear axle. No vibs. I did the lift, SYE, and rear axle all at the same time. No clue if it would have been ok without the SYE.
I'm at 5" of lift w/ 8.8 rear axle. No vibs. I did the lift, SYE, and rear axle all at the same time. No clue if it would have been ok without the SYE.
#11
Member
Thread Starter
Join Date: Feb 2018
Posts: 111
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee(SJ)
PORC SYE from Amazon and front XJ shaft, ~$200 total. Took me 3-4 hours to install with basic tools. Where are you getting $750?!
I'm at 5" of lift w/ 8.8 rear axle. No vibs. I did the lift, SYE, and rear axle all at the same time. No clue if it would have been ok without the SYE.
I'm at 5" of lift w/ 8.8 rear axle. No vibs. I did the lift, SYE, and rear axle all at the same time. No clue if it would have been ok without the SYE.
http://www.rustysoffroad.com/advance...riveshaft.html
tom Woods has a kit as well but you fork out $900 up front and once you send back your tail shaft as a core it ends up being $500
#12
Seasoned Member
#14
Junior Member
Join Date: Mar 2018
Location: Arizona
Posts: 87
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0L I6
1999 Cherokee Sport, 4.0L I6
NP231 transfer case
C8.25 rear axle
G2 SYE
3" Rough Country lift w/ new full spring packs
The SYE did not solve my vibrations. It in fact made them worse in my estimation. Vibs are not good. I'm sure my bearings are taking a beating. It sounds like a lawn mower at highway speeds.
Some looking at it revealed that the rear pinion is 7 degrees off from the transfer case output. No good, that needs to be zero. I considered shims, but at that big of an angle, the shock mounts will bind/break. Also not good.
At the beginning of April I'm having a local off-road shop re-weld the spring perches and shock mounts to correctly point the rear pinion at the transfer case. I already have the parts. The labor will cost me around $350-$400 (I'm pretty awful at welding, otherwise I'd do it myself.) I am taking this opportunity to install high-clearance shock mounts (link). If I have to get new ones anyway, I might as well raise them. Putting in beefier spring perches too. Again, might as well.
-T.
NP231 transfer case
C8.25 rear axle
G2 SYE
3" Rough Country lift w/ new full spring packs
The SYE did not solve my vibrations. It in fact made them worse in my estimation. Vibs are not good. I'm sure my bearings are taking a beating. It sounds like a lawn mower at highway speeds.
Some looking at it revealed that the rear pinion is 7 degrees off from the transfer case output. No good, that needs to be zero. I considered shims, but at that big of an angle, the shock mounts will bind/break. Also not good.
At the beginning of April I'm having a local off-road shop re-weld the spring perches and shock mounts to correctly point the rear pinion at the transfer case. I already have the parts. The labor will cost me around $350-$400 (I'm pretty awful at welding, otherwise I'd do it myself.) I am taking this opportunity to install high-clearance shock mounts (link). If I have to get new ones anyway, I might as well raise them. Putting in beefier spring perches too. Again, might as well.
-T.
#15
CF Veteran
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,679
Likes: 0
Received 15 Likes
on
13 Posts
Year: 1990
Model: Cherokee
Engine: 4.0
How attached are you to the 242? You can pull a 231 at Pick n Pull for $139.99, PORC SYE on Amazon $175, and XJ front shaft $35 (for rear).
Buy TC, do SYE and any other maintenance items while you have it on the bench. Then swap it for the 242. I understand the 242s command a decent price used, so you should be able to recoup a fair amount of your investment.
Buy TC, do SYE and any other maintenance items while you have it on the bench. Then swap it for the 242. I understand the 242s command a decent price used, so you should be able to recoup a fair amount of your investment.