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-   -   Pitman Arm... OEM or dropped for 4" lift? (http://www.wranglerforum.com/f282/pitman-arm-oem-or-dropped-for-4-lift-235454.html)

RufusT 04-15-2013 12:53 PM

Pitman Arm... OEM or dropped for 4" lift?
 
I am in the process if installing my rough country 4" x-series lift. It came with a drop pitman arm. The instructions seem to indicate this is necessary, but reading on this forum, it seems it may not be. What potential downfall comes from installing or nit installing? Advice?

UnlimitedLJ04 04-15-2013 12:59 PM

if you want bad bumpsteer and a Jeep that drives like crap, go ahead and install it.

if you'd rather have a Jeep that drives well, keep the stock pitman arm, combine it with a Currie TJS/TJJ front track bar from Savvy off-road, and properly set the caster & axle position with adjustable control arms. if you really want to get fancy, get the Currie steering too.

Jerry Bransford 04-15-2013 01:30 PM

Stay with the OE Pitman arm. Where a TJ is concerned, dropped Pitman arms are only used in special/unique configurations and when installed outside of those configurations, bump steer is the result.

Your configuration doesn't require a dropped Pitman arm and installing it would just cause bump steer. I'm running 4" now and previously ran a 5", all with the OE (non-dropped) Pitman arm.

Jad4271 04-15-2013 01:47 PM

I was wondering the same thing...thanks for the info

bmpage84 04-15-2013 02:07 PM

Listen to these guys their right on the money! (as usual!:rofl:)

I have a 4" RC N2.0 lift in my Jeep, and I'm running a stock pitman arm. I also added adjustable LCA's, UCA's, Track bar, and the Currie Correctlink steering system. I did away with the factory LCA mounts/cam adjusters (mostly because I tore one off going up some big rocks) and replaced them with Currie LCA mounts and mini-skids. I think it was worth the extra money because my front end is a snap to align/set castor, my pinion angle is right on the money, and I have 0 bumpsteer, 0 Death wobble, 0 shimmy/vibrations.

97TJAC 04-15-2013 03:49 PM

i myself went with the must install drop pitman arm with my 4" kit
and didn't take long i was removing it and putting the stock pitman arm back on
drives alot better

MrAutoPilot 04-24-2013 08:28 PM

I just removed mine and put the OEM pitman arm back on. Night and stinkin' day. I'm most upset about what I went through to remove the old one in order to install the darned thing to begin with. What a waste of time.

Newly installed long arm 04-24-2013 08:39 PM

They need to say if u drop one u need to drop both when u buy

Lowrollin12 04-25-2013 08:44 AM

I just installed Rock Krawlers short arm kit with the drop pitman arm and it the sterling is great and very responsive. no bump stear... I guess it depends on the application? IDK

Jerry Bransford 04-25-2013 10:16 AM

Do you know what bump steer is? Please don't take offense, most people have no idea what bump steer really is. With the TJ's steering geometry, installing a dropped Pitman arm without a corresponding drop at the driver's side track bar mount will cause bump steer.

wrangler dad 73 04-25-2013 10:25 AM

I ran a 4" sky jacker for many years and they require you to change the pitman, if I don't it would have voided their warranty. You need to buy a pit man arm puller (they are cheap to purchase) which you will need to use when removing the arm to prevent any damage to the steering box. I did not having driving or wheeling issues by changing the arm.
Of course different manufactures may or may not require you to change the arm

Jerry Bransford 04-25-2013 11:09 AM

I would like to see the verbage in Skyjacker's warranty that requires the use of a dropped Pitman arm.

Dextreme 04-25-2013 12:08 PM

I would really like to see a official response from SkyJacker and RoughCountry as to why they feel they need include a pitman drop in their kits...when it's not needed and messes up the handing if installed.

That lead me to believe these companies did very little (if any) testing of their kits. Scary stuff!

Shark_13 04-25-2013 12:18 PM

Quote:

Originally Posted by Dextreme (Post 3681592)
I would really like to see a official response from SkyJacker and RoughCountry as to why they feel they need include a pitman drop in their kits...when it's not needed and messes up the handing if installed.

That lead me to believe these companies did very little (if any) testing of their kits. Scary stuff!

My guess is they were designed for similar Jeep platforms, then changed minor lengths etc to fit the others.....probably right on the lack of testing.
It was night and day when i removed my drop Pitman that the previous owner had installed.

Jerry Bransford 04-25-2013 12:47 PM

Dropped Pitman arms have been required on lifted 4x4 vehicles including older Jeeps (CJ, YJ, etc.) for so many years that many (even some lazy manufacturers) just assume the TJ is no different & throw one into the kit.

But anyone who truly understands the geometry involved in preventing bump steer would quickly understand why a DPA is not usually needed on a TJ... if they would just bother to investigate which it seems companies like Skyjacker have not bothered to do.

Lowrollin12 04-26-2013 09:36 AM

Quote:

Originally Posted by Jerry Bransford (Post 3681190)
Do you know what bump steer is? Please don't take offense, most people have no idea what bump steer really is. With the TJ's steering geometry, installing a dropped Pitman arm without a corresponding drop at the driver's side track bar mount will cause bump steer.

Yes I do and I don't take offense. You are the Guru on the site and I take everything you say as GOLD.

The Rock Krawler Kit included a drop mount of the Track bar, roughly the same amount as the drop in pitman arm. Again IMO and why I chose RK, I think they put a lot of R&D into their lift for on and off road. Rides great so far.

UnlimitedLJ04 04-26-2013 09:45 AM

Quote:

Originally Posted by Lowrollin12 (Post 3685448)
The Rock Krawler Kit included a drop mount of the Track bar, roughly the same amount as the drop in pitman arm. Again IMO and why I chose RK, I think they put a lot of R&D into their lift for on and off road. Rides great so far.

problem is drop track bar brackets whack the tie-rod. that's why RK's tie-rod kicks way out in front of the diff, unlike the stock stuff....

Jerry Bransford 04-26-2013 11:50 AM

Quote:

Originally Posted by Lowrollin12 (Post 3685448)
. The Rock Krawler Kit included a drop mount of the Track bar, roughly the same amount as the drop in pitman arm. Again IMO and why I chose RK, I think they put a lot of R&D into their lift for on and off road. Rides great so far.

Ah there's the reason you're not getting bump steer! Yes that makes sense, thanks for the update. I'm not a fan of dropped track bar mounts, been there done that with Rubicon Express, but at least yours is working for you. :punk:


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