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Unread 06-29-2013, 10:01 AM   #1
MrMoosecakes
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Drop Pitman Arm?

So I recently purchased the IRO 4.5 inch lift kit for my zj and I was talking to my mechanic and he said its going to require a drop pitman arm with that much lift. So I've been looking and I noticed they come in a lot of lengths so I was hoping someone on here could tell me what size I should get. The IRO website only seems to have a 1 3/4 inch one. Will that be enough? Any input would be greatly appreciated

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Unread 06-29-2013, 10:18 AM   #2
Timo_90xj
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You would get much better results from running OTK steering and flipping the trackbar above the axle from under it. Requires welding, but you get much more horizontal angles on the trackbar & draglink, and the tierod above the axle centerline, away from rocks etc..

If you want to run drop pitman arm, you MUST have a trackbar frame-end mount that drops the trackbar mounting point lower so that draglink and trackbar are parallel. If you don't do that, you'll get bumpsteer.
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Unread 06-29-2013, 10:25 AM   #3
MrMoosecakes
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Quote:
Originally Posted by Timo_90xj
You would get much better results from running OTK steering and flipping the trackbar above the axle from under it. Requires welding, but you get much more horizontal angles on the trackbar & draglink, and the tierod above the axle centerline, away from rocks etc..

If you want to run drop pitman arm, you MUST have a trackbar frame-end mount that drops the trackbar mounting point lower so that draglink and trackbar are parallel. If you don't do that, you'll get bumpsteer.
Alright thanks and yea I'm just going to run a drop pitman because I don't have the tools or the know-how to start cutting and welding things. Basically I just need to know what size arm I need for a 4.5 inch lift
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Unread 06-29-2013, 11:39 AM   #4
WhiteOut
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To put it bluntly, your mechanic is a retard. You do not need a DPA or OTK steering at 4.5" of lift.
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Unread 06-29-2013, 12:09 PM   #5
Timo_90xj
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Quote:
Originally Posted by WhiteOut View Post
To put it bluntly, your mechanic is a retard. You do not need a DPA or OTK steering at 4.5" of lift.
Not needed for sure. DPA really is never needed; if you need one, then go OTK. If that's not enough, then you've got way too much lift

However, OTK steering at 4.5" of lift will result in a lot better steering geometry - and as I mentioned it'll raise the tierod out of the way on the trails.. I'm running OTK at 1.75" lift, and haven't seen one single drawback going that route. IMO every single offroad vehicle should've come equipped with OTK steering from the factory. Who was the idiot who thought it's a good idea to put the tierod below the centerline of the axle?!
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1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...

http://www.jeepforum.com/forum/f13/d...s-etc-1222317/


1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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Unread 06-29-2013, 12:30 PM   #6
MrMoosecakes
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Quote:
Originally Posted by Timo_90xj

Not needed for sure. DPA really is never needed; if you need one, then go OTK. If that's not enough, then you've got way too much lift

However, OTK steering at 4.5" of lift will result in a lot better steering geometry - and as I mentioned it'll raise the tierod out of the way on the trails.. I'm running OTK at 1.75" lift, and haven't seen one single drawback going that route. IMO every single offroad vehicle should've come equipped with OTK steering from the factory. Who was the idiot who thought it's a good idea to put the tierod below the centerline of the axle?!
Alright cool thanks. So I'm kinda on a budget right now so could I want till further down the road to upgrade to OTK? What would the major drawbacks be keeping the original steering for he time being? I will be driving this jeep to work so it needs to be street safe haha
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Unread 06-29-2013, 01:06 PM   #7
WhiteOut
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Zero drawbacks. I ran the stock setup until I bent it, then changed to Currie.

Still aligns and drives fine. No DPA and no OTK.
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Unread 06-29-2013, 02:31 PM   #8
Timo_90xj
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Quote:
Originally Posted by WhiteOut View Post
Zero drawbacks
More prone to DW, a bit more strain on the steering linkage/ trackbar/ trackbar mount. When wheeling, under extreme flex can run out of TRE flex. Stuff will wear out a bit faster compared to OTK due to steeper angles.

Other than that, no issues. I ran stock steering on my XJ on 4.5" lift and it was fine. I'm not saying OTK is needed, but it is better than UTK @ 4.5" lift
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1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...

http://www.jeepforum.com/forum/f13/d...s-etc-1222317/


1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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