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Old 04-02-2013, 07:58 PM   #1
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Angry Bump steer issue?

I have a 4" fabtech lift on 33's and i am getting alot of bump steer. I have tried to search the forums but i am getting alot of conflicting statements. Currently, it looks like there is a drop pitman arm installed on it, but i dont see a trackbar drop bracket installed, however i do have one sitting around, i believe. would it be better to install the trackbar drop since i dont have a stock pitman arm. or should i just wait and buy a stock pitman arm and trash the drop bracket and dpa? thanks in advance for any advice.

I have some pictures to help...

I believe this is a dpa not a stock one..


and here is where my trackbar connects to the frame (no drop bracket):


and here are my angles:


also, I have a picture of the trackbar drop that I have, just want to make sure that this is actually the part. :


a year or so ago I put on the piece on the right, )i am not sure what the part on the left is for) and was then told that the drop trackbar bracket was throwing everything off and needed to be removed, so it was. I had a suspended license at the time this was being done so i dont recall what difference it made but my dad ended up taking it off. I really want to fix this bump steer issue, I am just not sure what needs to be done.

any help is appreciated! thanks! I also have many more pictures or can take different angles if needed.

http://www.fabtechmotorsports.com/pd...on%20Sheet.pdf

page 10 shows the drop trackbar install

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Old 04-02-2013, 08:00 PM   #2
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Remove the dropped pitman arm, replace it with a stock unit, and your bump steer will go away.

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Old 04-02-2013, 08:04 PM   #3
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That Pitman arm has a HUGE drop on it and is the cause of your bump steer. Replace it with the OE Pitman arm and life will be good again.

That dropped Pitman arm installed now would only be appropriate when that other monstrosity, the dropped track bar bracket in your last photo, is installed. Neither should be installed, both are bad news. Keep the track bar installed as it is in your #2 photo.
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Old 04-02-2013, 08:08 PM   #4
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^^X2^^..The bracket on the left looks like a rear track bar relocation bracket.
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Old 04-02-2013, 08:18 PM   #5
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thanks for the quick response guys! there is a special pitman arm remover that I will need to get to get it off, right? I should be able to just rent one from like autozone or somewhere? and then, correct me if i am wrong, but I should get an alignment after i get the OE arm back on there?

and since i don't have the old stock pitman arm, do most places charge about the same for one?
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Old 04-02-2013, 08:26 PM   #6
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I will post another picture up when I get it switched out, probably this weekend, if you guys could check my angles and make sure they look correct?

thanks
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Old 04-02-2013, 08:30 PM   #7
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If your alignment is ok now, replacing the Pitman arm won't affect anything but the steering wheel's position. Once the OE Pitman arm is in place, simply turn the short adjustment link on the drag link connected to the Pitman arm until the steering wheel is straight again. You'll need to adjust that link to make the drag link a bit longer which is done by rotating the drag bar's adjustment link downward in front.
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Old 04-02-2013, 08:31 PM   #8
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Replacing the drop pitman arm with a stock arm will raise the end of the drag link (obviously) which will increase toe in. So yes, you'll need to set the toe, and then center the steering wheel.
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Old 04-02-2013, 08:37 PM   #9
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Quote:
Originally Posted by Patrick H View Post
Replacing the drop pitman arm with a stock arm will raise the end of the drag link (obviously) which will increase toe in.
Not once you do the required lengthening of the drag link via its adjustment link to restore the steering wheel back to center. The tie rod will be at the same position it was once the drag link's proper length is re-set.
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Old 04-02-2013, 08:38 PM   #10
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You can rent the pitman arm puller at autozone. Do not turn the steering wheel while PA is disconnected or you can break your clock spring.
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Old 04-02-2013, 08:39 PM   #11
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Quote:
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Not when you do the required lengthening of the drag link to restore the steering wheel back to center. The tie rod will be at the same position it was once the drag link's proper length is re-set.
No, lengthening the drag link will not change it's angle. It will still be pulled up higher at the steering box end, effectively shortening the tie rod.

If that were the case, adjusting the drag link length to center the steering wheel would change the toe-in.
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Old 04-02-2013, 08:46 PM   #12
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Moving the end of the drag linkup also moves it's connection point at the tie rod up, which shortens the tie rod's overall length. Look at the pic, and picture what happens when the end of the drag link is raised. It will pull the front tires together.
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Old 04-02-2013, 08:49 PM   #13
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Any time the steering box end of the drag link is moved in relation to the steering knuckles (where the tie rods are connected) it changes the effective length of the tie rod (drag link and LH tie rod, which as an assembly make up the total tie rod)

The inverted "Y" angles change.
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Old 04-09-2013, 11:42 PM   #14
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i have bad bump steer. Its so bad that siting in the drive way if i push down on the front bumper the steering wheel turns one way when i let off or even pull up on the front bumper it turns the other way. The wheel turns a total of 4-6". So i am planing to try the stock pit-man arm.

Has anyone ever noticed this with theirs before they swapped the pit-man back to the stock?
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Old 04-10-2013, 12:17 AM   #15
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A dropped Pitman arm will cause bump steer on TJ suspensions unless there is also a dropped upper track bar mount which isn't commonly installed. Reinstalling the OE Pitman arm should completely cure your bump steer.
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Old 04-10-2013, 10:32 PM   #16
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Quote:
Originally Posted by sag View Post
i have bad bump steer. Its so bad that siting in the drive way if i push down on the front bumper the steering wheel turns one way when i let off or even pull up on the front bumper it turns the other way. The wheel turns a total of 4-6". So i am planing to try the stock pit-man arm.

Has anyone ever noticed this with theirs before they swapped the pit-man back to the stock?
I was having that same issue, it was pretty bad. i could also turn the steering wheel by pushing down and lifting the bumper. Put the stock pitman arm back on!!!! I just finished installing the stock pitman arm about an hour ago. everything is working great now just like it should. I adjusted my toe using the tie rod adjustments and got it pretty close, however, still going to be taking it somewhere to get it aligned. i ran out of light before i could adjust the steering wheel back to center, so that will be done tomorrow when i get off work.
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Old 04-10-2013, 11:19 PM   #17
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well i know what i am doing latter today. thanks for all the input. i think this info will probably help many others.

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