New owner / member with some questions

Geis32

New Member
Original poster
Joined
Feb 19, 2020
Messages
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Location
USA
Hello all, I'm new to the site and a new TJ owner. Not new to off-roading or wrenching on my own vehicles, but I have a couple questions specific to my jeep that I hope you guys can help with. I recently purchased a 2005 jeep TJ Rubicon that only had 58,000miles with a 4.0 and a 6 speed manual. The jeep has a lot of aftermarket parts on it currently to include a Rubicon Express long arm kit guessing a 4.5 inch lift, an atlas 2 transfer case, 34 inch tires front and rear bumpers etc etc. I'm currently going thru it fixing some previous owner sins such as bad wiring for lights and aftermarket stereo, and some shoddy welding and crappy exhaust. Overall the jeep is in great shape and drives well, but I have noticed that it has a vibration on acceleration or constant throttle. It smooths out off the throttle. After doing some research it seems that the common problem is the rear pinion angle. Common fixes seem to be dropped transfer case or SYE. Question is, is there a SYE kit for an atlas transfer case or does it need one?? Never owned a vehicle with this transfer case so I'm definitely a rookie on this!! Any help or advise would be greatly appreciated!!
 
A Rubicon doesn't have a slip yoke to eliminate . You will want to look at your pinion angle , and do it soon .... vibes damage seals, etc. ..that long arm kit should be adustable ..lotta info on here on that , use the search engine.

I have an 03 Rubi with 50,000 and an 06 with 88,000, both smooth .

You will get it dialed . Sounds like a good one .
 
WIth that much suspension lift make sure your rear driveshaft is a double-cardan (CV) style which has one u-joint at the rear and two u-joints up front where it connects to the transfer case.

If it has just one u-joint up front you need to replace that driveshaft with a double-cardan like you can get from Tom Wood at www.4xshaft.com

If the rear driveshaft does have the three required u-joints (two up front), make sure your rear axle's pinion angle points directly up the driveshaft like it was aimed at the two front u-joints which is the double-cardan (aka C.V./constant velocity) joint. If your rear axle's pinion shaft is at the wrong angle it will cause vibrations. Especially if the pinion shaft is at too high of an angle.

It should look like this...

cv_angle.gif
 
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You can take what Jerry says to the bank sir . He ran the Rubicon just to get a break from the hard trails he normally wheels.
 
A Rubicon doesn't have a slip yoke to eliminate . You will want to look at your pinion angle , and do it soon .... vibes damage seals, etc. ..that long arm kit should be adustable ..lotta info on here on that , use the search engine.

I have an 03 Rubi with 50,000 and an 06 with 88,000, both smooth .

You will get it dialed . Sounds like a good one .

Thank you for the reply, definitely confirmed my suspicions!! Looks to be an easy enough fix!!
 
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Thank you sir, this is exactly what I was looking for!! I appreciate you sharing the knowledge!!



WIth that much suspension lift make sure your rear driveshaft is a double-cardan (CV) style which has one u-joint at the rear and two u-joints up front where it connects to the transfer case.

If it has just one u-joint up front you need to replace that driveshaft with a double-cardan like you can get from Tom Wood at www.4xshaft.com

If the rear driveshaft does have the three required u-joints (two up front), make sure your rear axle's pinion angle points directly up the driveshaft like it was aimed at the two front u-joints which is the double-cardan (aka C.V./constant velocity) joint. If your rear axle's pinion shaft is at the wrong angle it will cause vibrations. Especially if the pinion shaft is at too high of an angle.

It should look like this...

View attachment 141826