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Old 06-03-2016, 10:17 AM   #1
rogerkb1936
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Default shortened pitman arms

hi, seeking opinions or experiences concerning the newer forged pitman arms. concerned about safety of these. i have used the welded ones for a few years. one of those threw the steering wheel center off. still usable but a bit of a pain. are the forged ones ok in that regard? thanx for your time
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Old 06-03-2016, 10:33 AM   #2
CarlG
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Default Re: shortened pitman arms

If you use an adjustable drag link with the short pitman arm, you can adjust the steering wheel center any way you want.
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Old 06-03-2016, 11:48 AM   #3
MikeK
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Default Re: shortened pitman arms

A second option is to bend the new forged arm in a hydraulic press. The ball center needs to move back only about 0.062" (1/16") to compensate for the short arm's triangulation difference of 1.5". Bend the arm in the center, do not bend the ball riser!

There are a lot of parts mfg. tolerance and other variables between cars in the entire steering assembly. To compensate for everything you can put a dial indicator on the back of the drag link and move the steering wheel from the existing driving center to the desired wheel center. You can measure exactly how much offset is needed for your particular car. Then remove and bend the arm once.
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Old 06-03-2016, 11:49 AM   #4
C26Pinelake
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Default Re: shortened pitman arms

do a search as there are many posts on this subject. Wayne
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Old 06-03-2016, 12:19 PM   #5
glenn in camino
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Default Re: shortened pitman arms

I just took one off of my 31 sport coupe and went back to the original. The short arm reduced my turning radius too much.
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Old 06-03-2016, 12:54 PM   #6
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Default Re: shortened pitman arms

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I installed one...I like it
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Old 06-03-2016, 12:57 PM   #7
C26Pinelake
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Default Re: shortened pitman arms

Most people would never return to the original. I think it is a major improvement and have installed them on all six of my Model A cars. Wayne

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Old 06-03-2016, 01:46 PM   #8
29spcoupe
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Default Re: shortened pitman arms

I have one on my Coupe. I bought my from Snyder's. I have noticed a wider turning radius, but not so much that it bothers me. I have a bad arm and the easier steering is welcome.
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Old 06-03-2016, 02:59 PM   #9
Al 29Tudor
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Default Re: shortened pitman arms

Am I missing something?
I think the spindle pin nut limits the amount of turning not the shorter pitman arm.
The spindles will rotate until they contact the spindle pin nut which is the designed limit stop.
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Old 06-03-2016, 04:00 PM   #10
CarlG
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Default Re: shortened pitman arms

The common misconception is that the shorter pitman arm has a longer turning radius than the standard one. In actuallity, it's shorter in one direction and conversly longer in the other direction by the same amount. The adjustable drag link enables you to bring everything back to normal, so there is no loss/gain in turning radius.
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Old 06-03-2016, 04:33 PM   #11
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Default Re: shortened pitman arms

I don't see why there should be any difference in turning right or left. There is enough travel on the worm gear for the extra rotation right and left. The pitman arm position can be set in the midway position from right to left and any adjustment needed to make the vehicle track straight can be made by adjusting the tie rod so one wheel tracks straight and then adjusting the tie rod for the other wheel to track straight. If you run out of thread on one end, get what is needed from the other end. Is my thinking too simple?
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Old 06-03-2016, 05:12 PM   #12
Keith True
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Default Re: shortened pitman arms

All the shortened ones I've installed hit the stops both before and after.I did remove one for somebody that said it reduced his radius,when I showed him his spindles were hitting the stops he said it meant nothing,he knew his radius was greater and had me take it off.I don't know if I ever use full travel or not.On my pickup if I turn the wheels over to full warp in one direction,it is all but impossible to get them back again.If I back up a foot or so they straighten out.If I let the clutch out from a dead stop with the wheels at full warp the car will take off and turn,but it would really rather plow straight ahead.
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Old 06-03-2016, 05:14 PM   #13
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Default Re: shortened pitman arms

Mike , would you not move the ball end 1/16" forward as the inline position , ie wheels in straight ahead position the drag link would be too short by a small amount due to the angle changing slightly , We are currently making a pattern in order to have a short RHD one produced, in nodular steel , just like the LHD one , Ford made them shorter in 32- 35 , slightly more turning on the steering wheel but much lighter steering , Derek in a frosty NZ
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Old 06-03-2016, 05:15 PM   #14
Clem Clement
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Default Re: shortened pitman arms

I love mine. Rainmaker made it for me
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Old 06-03-2016, 06:53 PM   #15
Brian T
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Default Re: shortened pitman arms

Quote:
Originally Posted by 5lugnuts View Post
I don't see why there should be any difference in turning right or left. There is enough travel on the worm gear for the extra rotation right and left. The pitman arm position can be set in the midway position from right to left and any adjustment needed to make the vehicle track straight can be made by adjusting the tie rod so one wheel tracks straight and then adjusting the tie rod for the other wheel to track straight. If you run out of thread on one end, get what is needed from the other end. Is my thinking too simple?
It doesn't work that way, if you set the pitman arm in the midway position you will have to turn the steering wheel to do so, that will make it off center, it will not affect the toe in, if you have a 2 tooth box you may not have a problem reaching the stops left to right, however the steering wheel will move off center slightly, the 7 tooth is another story.
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Old 06-03-2016, 07:38 PM   #16
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Default Re: shortened pitman arms

So with an adjustable drag link , one could lengthen it & bring zero free play back to wheels pointing in a straight line , ??? Correct ???
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Old 06-03-2016, 08:39 PM   #17
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Default Re: shortened pitman arms

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Originally Posted by burner31 View Post
I installed one...I like it
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Old 06-04-2016, 01:42 AM   #18
34 FORDOR
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Thumbs up Re: shortened pitman arms

Derek you've got.Easy to cut your drag link , cut left and right threads and screw on an adjusting sleeve. Find the centre position in your steering box, mark your steering wheel at the top,then drive down the road, adjust so your mark is at the top. Steering lock will be equal left and right
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Old 06-04-2016, 03:36 AM   #19
dave in australia
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Default Re: shortened pitman arms

Of course, instead of putting a shorter pitman arm on to make steering easier, you could just eat your weet-bix in the morning. Or, have some vegemite on toast. TIC of course.
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Old 06-04-2016, 04:06 AM   #20
quickchange
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Default Re: shortened pitman arms

34 fordoor , mine are all LHD with short arms , What we are trying to do is produce a legal right hand pitman arm due too demand, to cut & weld is illegal unless certified , with ageing drivers some want lighter steering ,& have been cutting & welding there own, not recommended, Some time ago we found a fault with new repo sector shafts in both right & left form , adjusted to zero free play , wheels where pointed at one o'clock or 11 o'clock depending if rhd or lhd , supplier since supplied correct ones , yes an adjustable pitman arm solved this , At 90mph it needs to have no slack, The f100 box is a good transplant , Dave veggie mite is for you guys , here we eat marmite that's why our rugby players kick arse, lol
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