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Re: Alignment after UCA swap [Re: justice] #883944 05/04/08 06:46 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
Quote
the mounting shaft on the gen 2 arms, can be rotated 180 degrees.


As can the Gen1 pivot.... that's how you adjust caster angle.

Frank


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: Alignment after UCA swap [Re: justice] #883945 05/04/08 09:54 PM
Joined: Dec 2004
Posts: 5,231
CapnCrunch Offline
Trail Leader
***
Quote
It may be too late for this but from what others have said and from what I remember of looking at the set In my garage, the mounting shaft on the gen 2 arms, can be rotated 180 degrees. The thought being that the other side is a little bit thicker from the center axis making it easier to get the proper camber without the need for adding as many shimms. Maybe Tag or captn' can chime in on this one.


I've mentioned that several times in the past. The mount-shaft of the Gen I UCA is even on both sides, while the mount-shaft of the Gen II is very noticeably thicker on one side.

When I first mounted mine, I mounted them with the thinner side against the frame. Even after cranking the t-bars, I had a very obvious positive camber (i.e., top of the tires leaning out from the truck). I decided to flip the mount-shafts so that the thicker sides were against the frame. This brought the camber much closer to zero, and I was able to correct it with one shim each side.

It was easy to flip the shafts. I just:

- jacked up the front of the truck, putting it on jack-stands (weight supported at the forward crossmember)

- supported the LCA somewhat with a jack - just enough to take the strain off the UCA mount-shafts

- loosened the mount-bolts for the UCA enough to verify that the shaft could be moved at least with a wrench but wasn't going to pop away from the frame when the nuts and bolts were removed completely (adjusted jack supporting LCA accordingly)

- IIRC, I think I may have even loosened (but not removed) the ball-joint nut connecting the UCA ball-joint to the knuckle

- removed the UCA mount-shaft bolts and used a wrench (and/or perhaps a screwdriver in the bolt-holes) to get the shafts rotated 180?

- reassembled


?_________
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Stay the Trail!

Re: Alignment after UCA swap [Re: CapnCrunch] #883946 05/04/08 11:18 PM
Joined: May 2007
Posts: 435
DirtDriver Offline OP
Mudrunner
I installed the UCA's with the thicker side against the frame, so that's good to go.

Originally, there were 2 2mm shims on the driver's side and 3 2mm shims on the passenger side. I left 2 on the driver's and 2 on right. I cranked the torsion bars until there was 4 inches from the lower bump stop and the bottom of the lower rubber bumper on each side. Driver's side is about 3/8" higher unloaded. That left about 5/8" between each upper bump stop and the trimmed upper rubber bumper. With the old UCA's I only had about 1/4" between the upper bump stop and the trimmed upper rubber bumper. So I have more downward articulation than before, which results in a smoother ride. It looks like this.

[Linked Image]

With this setup, I have 0.9 positive camber (54 minutes) on the driver's side and 0.2 (12 minutes) on the passenger side.

To get 0* camber I've got a couple of choices. One, I could crank the t-bars more, which decreases camber. But that would limit downward travel and result in a rougher ride, hitting the bumpers more. No likee.

So I'm going to add 2 more 2mm shims on the driver's side (52 minutes correction) and 1 more 1mm shim on the passenger's side (13 minutes correction). That should bring me real close to 0* on both sides.

The really sharp among you will have noticed something ugly about that picture that will eventually involve many hours of fun.


1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.
Re: Alignment after UCA swap [Re: DirtDriver] #883947 05/05/08 02:28 AM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline
Web Wheeler
*****
Is that a welded on sway bar?


Not responsible for advice not taken...
Re: Alignment after UCA swap [Re: fasteddy] #883948 05/05/08 05:11 AM
Joined: May 2007
Posts: 435
DirtDriver Offline OP
Mudrunner
No way. Do people do that? Oh, I see what you're seeing; that's just a petrified glob of grease in front of the tie rod.


1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.
Re: Alignment after UCA swap [Re: DirtDriver] #883949 05/05/08 01:23 PM
Joined: May 2007
Posts: 4,628
hazy_daze Offline
Roll Me Over
*****
Looks like a split in the inboard CV boot <img src="/forums/images/graemlins/frown.gif" alt="" />


Fasteddy's advice is occasionally sound...
Re: Alignment after UCA swap [Re: hazy_daze] #883950 05/06/08 04:05 AM
Joined: May 2007
Posts: 435
DirtDriver Offline OP
Mudrunner
Bingo. While doing all this front end work, I noticed both sides are the same way. Funny, there is no band with boot remnants on either side suggesting that they were never installed right. I'm not even sure the boots are correct because the ends are perfectly round and smooth--they don't look torn. And the ends don't have the grooving that the band would attach to. Definitely going to have to take care of it soon.


1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.
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