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Swaying on interstate / steering tightens up coming off interstate

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falconcritter
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Swaying on interstate / steering tightens up coming off interstate

Post #1 by falconcritter » Sun Jun 30, 2019 4:37 pm

When the we first got our Falcon last year we got the engine , brake issues fixed and started from there too work out the bugs . We did notice on the interstate the car front end floats . Fast forward other work we did I got too new shocks front and back , an added a chin spoiler. It holds down the car good . Today I put it up on the interstate today and it now sways and when you come off of the interstate the steering tights up hard ! Does any know is going on ? Any fixes? I would like too take it out of town too Falcon meets , but it is not trustworthy for long distance
1969 Ford Falcon 2Door and future home for my Australian 250 2V , 2013 Ford F-150 Single Cab , 2018 Ford Escape S

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falconcritter
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #2 by falconcritter » Sun Jun 30, 2019 4:46 pm

I did have the front end checked and aligned last week
1969 Ford Falcon 2Door and future home for my Australian 250 2V , 2013 Ford F-150 Single Cab , 2018 Ford Escape S

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #3 by bubba22349 » Sun Jun 30, 2019 5:26 pm

What front end alignment settings were used? Does the Falcon have a front sway bar and or a rear one? Has the steering box play been adjusted? :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #4 by falconcritter » Sun Jun 30, 2019 6:54 pm

I have not messed with the steering adjuster on top of the box at all . Falcon does not have front or rear anti-sway bars . here are the current settings on the front end ....
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #5 by bubba22349 » Sun Jun 30, 2019 10:07 pm

:hmmm: Did they happen to give you a print out of the before measurements so you could tell what they changed? I also can't determine the Toe setting Degrees to inches conversion that you have now without knowing the tire diameter, my guess is that it isn't right though. In any case these are not good alinement settings for a Falcon suspension and it's no wonder that the handling isn't good (swaying) there is just too much difference from side to side. Looking at the spring towers do you notice one side leaning more than the other?

Looking at the alignment specs the LF setting of 0 is good on Camber (and the only setting that's within below specs) but the RF is not with .1 Posative
The LF Caster is negative (not good) the RF is Posative but it ts not anywhere near the correct amount


Here is the settings you should ask for on your 1969 Falcon with today's modern tires Radials.

There should not be more than .25 Degrees difference from side to side.

+2.0 Degrees Caster for Manual Steering and +3.5 Degrees Caster with power steering.

-.50 to 0 Degrees Camber

No Posative Camber please!

1/16 to 1/8 inch Toe In.

A single 1/2 to 5/8 inch front sway bar would also be of help on handling. Or you could also use a 3/4 to 7/8 inch front bar with a 1/2 to 5/8 inch rear bar.

With the car on level ground does it look like its setting level side to side? Take a measurement at the same place on each wheel fender lip to check out how close it is.

With the steering box tightening up with use I suspect that the steering box adjustment is set too tight do you feel any play in it when you rock the steering wheel back and forth? Are all the tie Rod ends and the Idler Arm all in good condition (snug)? I do think once you get the front settings right the handling will be quite good even without a sway bar, however having the steering box tightening up isn't good and that needs to be worked on to find the problem. Good luck FalconCriter :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #6 by bubba22349 » Sun Jul 07, 2019 12:50 pm

Hi FalconCriter, have you made any progress on the handling? Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #7 by falconcritter » Sun Jul 07, 2019 10:03 pm

hello bubba , well I was going too do something about it on Friday, but I went out too warm the Falcon up I shut it off and noticed my radiator was leaking ! So I got into removing the Original rad and replacing it with a Aluminum Rad we had for a long time ! It was going a long until the tried too mount the fan , the spacer was too long . Had too get a shorter spacer off of Flea-Bay , waiting too reassemble . I did buy a front sway bar . I did notice the adjuster screw is pretty far up . I don't think it has ever been adjusted down .
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #8 by xctasy » Sun Jul 07, 2019 11:39 pm

FC, the problem is insufficent front wheel castor, the layback which must be in excess of 3 degrees to generate stronger steering self centering. Stiffer springs are needed at the front, V8 Torino ones cut down half s coil.Toe in must be set the same as the radial equiped 1980 Granadas. You need a front Stabilzer bar off a 1969 Torino V8. Then you need to readjust the rear roll center that has been knocked out by the anti tramp bars. The tires, what size are they again? The target roll out should be basef on a 25" or 635mm tall tire loaded on the car. The tire placard on your glove box gives the target tire height. You cant drop that figure from 25 inches unless you use 245/ 50 14 tires.

The six cylinder Falcons had carry over four stud hubs, as well as the older axle and softer leaf springs. Modern shock absorbers need to have the right bump and rebound settings. 90/10's cause alarming sway on off ramps.
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #9 by bmbm40 » Mon Jul 08, 2019 4:35 pm

If you’re talking about speeds in excess of 100 it could feel sort of floaty on the highway.
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #10 by falconcritter » Mon Jul 08, 2019 6:35 pm

Heck No ! Car was floating on the interstate at speeds of 60 to 80 ! I got new shocks and added the front chin spoiler . It has held the front of the car down nice . But it is the swaying that is a problem now on the interstate. It is not a problem if I am on a road at 60 mph . I want too go long distance down in south Florida too Falcon club meets . It is always something with my Falcon . Just got a shorter fan spacer today . Will post when up and running .
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #11 by falconcritter » Sun Jul 14, 2019 12:47 pm

I installed the Aluminum Radiator, hoses, fan and new spacer / bolts, yesterday . The wife came up with a brilliant plan too protect the core fins with foam board from walley world while I was installing the fan . Not a lot of room as you can see from the rad too fan ! I took it out this morning on the road too test for leaks . It is really a lot cooler Temps now !
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #12 by bubba22349 » Sat Jul 20, 2019 7:08 pm

:beer: FalconCriter congrats on getting the cooling system in top notch condition radator Iinstall looks beautiful! Did you get a chance to work on improving the steering box operation and then the front end alignment set correctly as in post #5 above? Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #13 by falconcritter » Sun Jul 21, 2019 9:04 am

Hey Bubba , well I have been trying too get somebody too install my sway bar ( Goodyear , Firestone ) but they say they can't because I brought the piece , and they say they have no one who is qualified to do it . just lazy I guess . I did try too get them too realign it but he was swamped and said bring it back some other day . I did adjust the steering box screw a half - three quarters turn . And it did help a lot ! it did not tighten up hard when I came off of highway . it still over corrects when changing lanes and I little sway , but not as much .
Last edited by falconcritter on Sat Jul 27, 2019 12:17 pm, edited 1 time in total.
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #14 by bubba22349 » Sun Jul 21, 2019 2:25 pm

:hmmm: yeah that dose sound a bit like lasyiness on their part. A sway bar is really so easy to install about an hour or less of work, only few regular hand tools required for tightening the 4 mounting bolts to the chassis and then installing the two links to the lower control arm, no special qualifications or knowledge is needed.

Glad you have the steering box adjusted, most of the rest of the swaying will be fixed just by getting the Right Front Camber set to 0 degrees and by adding the proper Caster to both sides. Maybe you could even install the sway bar yourself too it real easy. Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #15 by Charlie Cheap » Tue Jul 23, 2019 2:43 pm

My 65 Mustang six had a similar problem with sway on the highway. Poly bushings in the front sway bar and adding a rear bar with poly bushings solved my problem. I built it for long highway running. It appears todays radials have a lot of sidewall flex that really shows up on older cars. If your car did not have sway bars, definitely add them. Mine is like night and day now. Drove my six from Abilene, Texas to Lebanon, Tenn. last summer and got 25 mpg running the Air all the way...2,275 miles. The 200 is now 206 with a .060 overbore (not recommended but necessary), has a 2-barrel adaptor with Autolite 2100, hotter home made points dizzy with Pertronix, ACCEL hot coil, MSD low resistance ignition resistor, Copper core ACCEL wires, basic valve job, free-flowing exhaust with OEM cast iron manifold, and straight-thru 24" muffler. Add a home-made cool-air intake, 2.83 gears and 26.3" tall rear 15" tires and it spins only 2800 RPM at 75 MPH. If I knew how I would add a picture. Good luck.

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Re: Swaying on interstate / steering tightens up coming off interstate

Post #16 by falconcritter » Tue Jul 23, 2019 8:56 pm

Thanks for the info Charlie ! It does help when you hear of others and there struggles . Hoping too get mine reminded before long .
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Re: Swaying on interstate / steering tightens up coming off interstate

Post #17 by Charlie Cheap » Fri Aug 09, 2019 10:32 am

Falconcritter, my 65 Mustang coupe is set up for highway Long Distance driving and "sway" was a real problem. We lived in the country so any trip was a long one. The first time I pulled out on the highway and got up-to-speed, I was shocked. I spent 50 years building cars both as a hobby and a business, but the loose-feel was strange. With a couple of buddies rocking the car as I looked from the rear, the tire sidewalls definitely flex. Having Dallas Mustang rebuild the steering box, adding poly bushings in the front sway bar, rear leaf mounts, and adding a rear sway-bar solved my problem. New 15" wider wheels/tires helped also. Adding front disc brakes and a few more Horse Power made driving a real pleasure. Throw-in 25 MPG Highway while running the AC on trips, and I now have a truly fun Pony.

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