Typically you want around 5 degrees of caster, give or take a half a degree. But it also depends on things like tire size and how you like your Jeep to drive. More caster is more stability, but there is always a price. More caster can make the steering slower.wow, a lot of posts! I just did Metalcloak 2.5" lift and thought I needed 6* caster but reading here it sounds like I should have the shop set it at 5.5" instead? is that right?
35" tires, 2.5" Metalcloak True Dual Rate lift with adjustable upper control arms.
gains right about 2 inches of lift on my 2913 JK Rubi 10A.
If your pinion angle for the front axle is off, it can cause vibrations whether you are in 2WD or 4WD. The drive shaft is always spinning, so the potential for driveline vibrations is always there.Could you get vibrations in the front driving in 2wd with too much caster and too little pinion angle? Saw 5* caster vs 4.5*?
I'm thinking my telling them 6* was too much but trying to decide if I should have them set it closer to 4.5* to see if that eliminates the minimal vibration I felt at 40mph -- though that may have been caused by other issues (track bar length off, steering out of wack, toe etc etc...
Maybe have them set to 5* and complete alignment and then see what happens?
If no driveline vibrations then leave it. Assuming you have the stock driveshaft? Its a little more lenient with pinion angle.Thanks -- I can do that, though these have only one adjustable end so I'd have to remove that end, rotate, put back on and then do the other one etc. I can do that.
Should I just have them set the caster at 4.5* or 5* with the alignment instead of the 6* I was originally thinking? Just looking for the best start point.