|04-24-2013 09:51 AM|
I never updated....
Getting the rear upper adjustable CA's & bracket installed solved my vibes. Pinion angle dialed in within 1 degree & all is well. Removed the T-case drop too so gained an inch of clearance.
|04-24-2013 06:44 AM|
|All Terrain JK|
|04-24-2013 01:07 AM|
|02-21-2013 08:47 PM|
The rest of this is just a learning process, slowly making it better!
I just thought of something too, after eliminating the tcase drop, that should get the front driveshaft angle closer to the pinion angle as well. Bonus!
|02-21-2013 08:33 PM|
Ordered the bracket, as well as some Savvy alum rear upper ca's, can't wait!
Also need to service my diffs and do a pinion seal....
Then lose the tcase drop!
|02-21-2013 08:28 PM|
|02-21-2013 06:01 PM|
|Shark_13||Doh! One more part to buy. Thanks, didn't realize i needed an angled bracket.|
|02-21-2013 09:06 AM|
|beerly||i have the same set up. The rear bracket is common with most lifts. But once you roll the axle back with the rear upper CA's to get the pinion angle right for the SYE, you will need the angled track bar mount to keep the TB from hitting your gas tank. I have this one JKS Manufacturing OGS160 - JKS Manufacturing Rear Angled CV Trackbar Bracket for 97-06 Jeep® Wrangler TJ & Unlimited with Over 3" Lift - Quadratec. Also watch for the shocks hitting the spring pads. Some use shock relocation brackets, others just notch the pads.|
|02-20-2013 05:11 PM|
Ok, front track bar is adjustable.
Rear is not (stock??), but it appears there is a relocation bracket on the axle side.
|02-19-2013 10:28 PM|
I'll have to crawl under again and verify, but i think both front and rear track bars are aftermarket and I thought I saw a non stock looking bracket on the rear....
I'll double check tomorrow.
|02-19-2013 09:52 PM|
|Bigkidneys||You got lucky with getting all that. Gonna do the same myself as the PO of mine had a BB with shocks that were not original.|
|02-19-2013 09:50 PM|
|Patrick H||You'll also need an angled track bar bracket to keep the track bar bushing aligned after the rear differential is pitched up to align your pinion angle.|
|02-19-2013 09:44 PM|
Thanks for the reply Patrick,
Confirms what i was thinking, just wanted to make sure before i go ordering parts.
Hopefully adding the adjustable rear uppers I will get rid of the vibes, and would be nice to gain 1" clearance by removing the tcase drop.
My guess is PO had the tcase drop because of the stock control arms...
At least they had installed the sye and dc drive shaft...one of the few things they did right....even if everything else wasn't finished lol.
|02-19-2013 08:49 PM|
|Patrick H||Same story on the front. You want your front pinion angle to be within 1 degree of the drive shaft angle.|
|02-19-2013 08:41 PM|
BUT, since you have a DC rear shaft, the pinion shaft should be aimed almost directly at the transfer case output, about 1 degree below. You need adjustable upper rear control arms to adjust this. And you can lose the transfer case drop once you accomplish this.
|02-19-2013 08:14 PM|
This is what appears to be the tcase drop...???....
Hoping i can remove those after getting the adjustable rear upper control arms...thoughts?
|02-18-2013 06:08 PM|
|Shark_13||Forgot, it also has a SYE (obviously) to go along with the DC rear driveshaft.|
|02-18-2013 05:36 PM|
Driveline angles, MML, TC drop, round 2...help please :)
I have the jeep handling much better (no wandering etc). I do however have slight vibes around 55mph. Would love some comments to make sure I am heading in the right direction.
Bit of history of what I did already (thanks for the info in there!)
This is what I currently have (installed by PO):
-98 sport 4.0L, 4" lift, 33"x12.5" tires.
- 1" MML
- 1" TC drop (do I even need this??, or were these stock on '98 sports? not sure if the skid plate normally bolts directly to frame)
- Double cardan rear drive shaft w/ spicer joints
- Stock control arms (pretty sure I need adj rear uppers at a minimum)
So I crawled under the jeep & measured some stuff:
- Rear flange off tcase - 11 degrees
- Rear DC driveshaft - 14 degrees
- Rear pinion angle - 11 degrees (this is the cause of the vibes right??? Needs to be in line with DS aka 14 degrees, fixable with adjustable upper control arms??....)
- Front stock driveshaft - 7.5 degrees
- Front pinion angle - 9 degrees
- Caster angle - 5.5 - 6 degrees (measured on knuckle & top of ball joints)
- Stock control arms, lowers have cam bolts and appear to be holding after my one & only off-road trip
Not terribly worried about front anymore as the wandering issue has been resolved.
So.....adjustable rear upper CA's, dial the pinion angle to match driveshaft angle, hopefully get rid of the vibes?
Thoughts on removing Tcase spacers? What problems will I encounter after that??....