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Unread 06-23-2013, 10:28 PM   #1
Raimundo
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1993 ZJ 
 
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Caster

Anyone knows what is the factory caster setting for '93 ZJs? With the new coil springs and spacers I gave it about 1 1/2" lift, so I need to adjust the caster to factory set by rotating the differential towards the front, right? But I don't know how much. Thanks

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Unread 06-24-2013, 04:23 AM   #2
denn34
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It's going to be nearly impossible to do on your own, and get it right without an alignment
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Unread 06-25-2013, 11:41 AM   #3
Raimundo
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I already did alignment/balancing. Took it to a shop with one of those computerized ramps.But they didn't do caster The front suspension/steering is entirely new. It goes straight, doesn't pull to sides, but I'm getting this vibration at 60-65mph and bump steer sometimes. I feel like if the differential is "dancing" a rapid waltz from side to side!!May it be the "variable" rate coil springs? Poly isolators? Control arms?( all that from Autozone) ALL metal pars-tie rods etc are tightAny ideas as to why this is happening would be really appreciated. Thanks.
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Unread 06-25-2013, 02:16 PM   #4
HighLonesome
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The vibration is likely from a bad pinion angle. If you lifted it and didn't reset it I'd bet on it.
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Unread 06-25-2013, 02:27 PM   #5
Raimundo
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Hey HighLonesome!!!I really appreciate your input.( and others) See,,,I'm going crazy with this but now,,,,How do I reset that angle? I think I'm getting somewhere here. Please respond. Thanks again.
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Unread 06-25-2013, 03:10 PM   #6
speedbucket
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Keep the pinion inline with the driveshaft
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V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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Unread 06-25-2013, 03:20 PM   #7
Raimundo
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wow! That's a hard ball jaja, So that means I have to rotate the differential a little towards the front right? I've been thinking for days, to remove the front drive shaft and drive it to see if it goes away,,,if so, that's it!!! I have to play with it 'till I get it right??..
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Unread 06-25-2013, 03:26 PM   #8
speedbucket
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The bolts should be closer to the rear of the eccentric slot than they were
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V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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Unread 06-25-2013, 03:37 PM   #9
HighLonesome
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^this

These are the same bolts that adjust the caster. The lower control arm cambolts. Get it straight as you can. Whatever caster you end up with is what it is. Pinion angle takes precendence over caster.
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Unread 06-25-2013, 03:59 PM   #10
Raimundo
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Very Good!!!. I already rotated the differential a little,,I would say about 1/4", I know 'cause I marked the cam bolt position so, I guess I have to move it more
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Unread 06-25-2013, 04:08 PM   #11
Raimundo
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By the way guys, do ZJ's come with any kind of spacer between the steering gear case and the frame?. I saw it somewhere online and I wonder if that has anything to do with anything down there at all.I'll adjust that angle ASAP and post again. Thank you all.
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Unread 06-25-2013, 04:26 PM   #12
HighLonesome
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no spacer
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Unread 06-25-2013, 05:20 PM   #13
Raimundo
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good, thanks
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