Rear castor and pinion angle adjustment on a 5-1/2" lift

EROCK

EROCK

TJ Enthusiast
Original poster
Joined
Dec 1, 2018
Messages
200
Location
Arkansas
Hello,
Just installed Core "Rear" Adjustable Upper and Lower control arms on my 2000 TJ 6cyl. What degree castor should I shoot for with a (measured) 5 1/2 in lift. I have 1 degree difference between pinion and shaft and 4 degrees between balancer and shaft. I've read its best to even the degree difference between balance/shaft and pinion/ shaft. So that its 2.5 and 2.5 difference. But before i get under there and remove the arms again I want to get my rear castor dialed. I know this isn't as popular as front castor. But i can definitely tell a major difference with the longer control arms in the back. The back is planted now. With the stock arms it was all over the place in the back so i want to get the best castor possible to get the full benefit from these adjustable arms. Thank you.
 
Wel
mrblaine said:
Caster is the angle of the steering axis. You don't have rear steer do you?
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Haha, woops. I'm letting my green show.. I'm still new to this and learning alot. Perhaps I'm using the wrong terminology. How do I center my rear axel as close to factory with adjustable upper and lower control arms . The pinion angle can be adjusted to correct angle and any length. I need to know what length to make the control arms and then set pinion angle. Sorry if I used any wrong terminology in that. Hopefully you can understand what I'm asking.
 
Centering your axle requires an adjustable track bar.

There is no specified length for aftermarket control arms when setting your pinion angle. Every jeep has their own specific measurements. When I installed mine I set them at factory lengths based off OE control arms. From there I fine-tuned the lengths by cycling the suspension (coils removed) to make the bumpstops centered with the bumpstop pad (spring pad) at full bump.
 
toximus said:
Do you have a track bar or is this a 4 link? If you don't know, post up a few pictures.
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Yes, its a fixed track bar. I am talking about centering the wheels in the wheel well. Not the side to side adjustment of an adjustable track bar. That is something i will be doing in the future though.
 
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