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Unread 01-05-2013, 10:37 AM   #16
biffgnar
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While I agree that he should have an SYE and double cardan driveshaft for the lift he has, I've got to say that I don't think the pinion setting is necessarily wrong as is. You guys are focusing on the fact that the pinion and driveshaft are inline, but take a look at the relationship between the pinion and the TC output. They look pretty parallel to me which is the correct setting. It just so happens that with his TC drop in place that puts the driveshaft inline also. Yes, the TW diagram has both outputs horizontal, but thats not the point. The point is they should parallel whatever that is so the ujoints are splitting the angles equally.

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Unread 01-05-2013, 10:45 AM   #17
TroubleNEO
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Quote:
Originally Posted by biffgnar View Post
While I agree that he should have an SYE and double cardan driveshaft for the lift he has, I've got to say that I don't think the pinion setting is necessarily wrong as is. You guys are focusing on the fact that the pinion and driveshaft are inline, but take a look at the relationship between the pinion and the TC output. They look pretty parallel to me which is the correct setting. It just so happens that with his TC drop in place that puts the driveshaft inline also. Yes, the TW diagram has both outputs horizontal, but thats not the point. The point is they should parallel whatever that is so the ujoints are splitting the angles equally.
I agree with you on them being parallel, but after running angles just like that on my rear I was blowing through ujoints fairly quickly. After getting ready to replace them a third time between Nov-Jul I said screw it and went with the CV shaft and changed everything around to be correct.
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Unread 01-05-2013, 10:49 AM   #18
Imped
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One thing is for sure. The PO of that Jeep had no clue what they were doing.
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Unread 01-05-2013, 10:55 AM   #19
biffgnar
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Originally Posted by TroubleNEO View Post
I agree with you on them being parallel, but after running angles just like that on my rear I was blowing through ujoints fairly quickly. After getting ready to replace them a third time between Nov-Jul I said screw it and went with the CV shaft and changed everything around to be correct.
Yes, but that is the point of needing the CV shaft which I acknowledged. But you told him the geometry of his current shaft was wrong, which is bad advice. The geometry is correct for the shaft he has. Or put another way, with the shaft he has how would you change the pinion orientation?
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Unread 01-05-2013, 11:00 AM   #20
TroubleNEO
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Originally Posted by Imped View Post
One thing is for sure. The PO of that Jeep had no clue what they were doing.
I think we can all agree on that.

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Originally Posted by biffgnar View Post
Yes, but that is the point of needing the CV shaft which I acknowledged. But you told him the geometry of his current shaft was wrong, which is bad advice. The geometry is correct for the shaft he has. Or put another way, with the shaft he has how would you change the pinion orientation?
You are right, his geometry is not technically "wrong" if we're going by the book. I was saying it was wrong from a personal experience standpoint where I ran like that and had issues. I will admit there is nothing he can currently change or adjust to make the angles "right" and it was incorrect to say that his current geometry is "wrong" going by the book.
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Unread 01-05-2013, 11:24 AM   #21
skizman
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Allright. Now you guys got me in a tailspin. Thankyou for the bad news...I mean it....thankyou! I'm picking up a new track bar today, so I'll start with that. I've got my homework
now. I really appreciate you guys to take the time to help me out. Hopefully in the next week I can make it all happen.
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Unread 01-05-2013, 11:30 AM   #22
TroubleNEO
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Originally Posted by skizman View Post
Allright. Now you guys got me in a tailspin. Thankyou for the bad news...I mean it....thankyou! I'm picking up a new track bar today, so I'll start with that. I've got my homework
now. I really appreciate you guys to take the time to help me out. Hopefully in the next week I can make it all happen.
What kind/brand of new track bar? Don't go buying more garbage and exacerbate your issues.
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Unread 01-05-2013, 07:18 PM   #23
tjsean0308
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A four inch lift really should have an adjustable trac bar. The stock one will have to use the new hole and that is not ideal. Also for the dry steering test leave the jeep on the ground. The weight of the vehicle on the tires will help expose any movement by creating more force on the trac bar and steering components.
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Unread 01-06-2013, 04:51 PM   #24
skizman
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My happy news! I installed a new track bar in the front and bolted it to the original hole on axle side and......95% of the steering wheel shaking is gone! What a relief! You guys made alot of comments about checking the track bar. I thought about just buying the bushing and tie rod end, but considered the major hassle of trying to press the old out and new in and I didn't need to go through all that grief, so I just bought the new track bar...ready to go.
Thankyou for you help!!! Now I need to smoke my brain about the rear drive shaft.
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Unread 01-06-2013, 05:22 PM   #25
The_Dealer
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Seeing the diagrams it looks backwards. I thought cv shafts/sye needed the pinion lower then being paralell? Or am I confused? In my yj with sye I had to remvoe the pinion shims that came on my loft springs.
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Unread 01-06-2013, 05:26 PM   #26
rchase559
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Quote:
Originally Posted by The_Dealer
Seeing the diagrams it looks backwards. I thought cv shafts/sye needed the pinion lower then being paralell? Or am I confused? In my yj with sye I had to remvoe the pinion shims that came on my loft springs.
Your YJ had axle wrap because of the leaf springs. Under load, the axle housing rotates causing the pinion to point slightly upwards.

This is not the case with the link suspension on the TJ
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Unread 01-07-2013, 07:40 PM   #27
The_Dealer
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ah ok, I thought maybe it was just a leaf thing. Now I.learned something new
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Unread 01-07-2013, 08:17 PM   #28
jeeptjrn
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If nothing else I would consider adjustable trac bar. The angles on your pitman arm seem sharp but may just be the picture.
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Unread 01-08-2013, 03:25 PM   #29
skizman
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Originally Posted by jeeptjrn View Post
If nothing else I would consider adjustable trac bar. The angles on your pitman arm seem sharp but may just be the picture.
I just installed a new stock trac bar and I'm glad I did.
Thanks.
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Unread 01-08-2013, 07:08 PM   #30
tjsean0308
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How far off center is your front axle? I would think about re-enforcing that axle bracket they tend to crack with that extra hole.
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