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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

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Old 07-15-2014, 01:25 PM
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Is this an issue with my frame?

I have been considering lowering the front of my truck using Posie Dualflex springs and as I was looking at it again today trying to figure out what clearance issues I might run into I noticed that on the drivers side my leaf spring was only about 1-1/2 inches from the bump stop but on the passenger side it was closer to 2-1/4 inches. Also when measuring from floor to front fender at the center of the wheel there is a 3/4 inch difference side to side.

Is this normal due to weight difference from side to side or is this a sign that my frame is sprung or bent? The truck drives fine down the road but the difference I am seeing concerns me. As a relative newbie to these trucks and this type of project I was hoping for some advice from more knowledgeable folks on these forums as to how big of concern this is etc.


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Passenger side


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Drivers side
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Old 07-15-2014, 01:28 PM
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looks like your drivers side spring pack is arched the wrong way. Could be worn out springs
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Old 07-15-2014, 01:58 PM
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I can't say I've ever seen a Bonus Built with these second bumpers, could have been added ?? Note that it appears one leaf has already been replaced (square end vs. tapered). Time for new springs, I'd say.
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Old 07-15-2014, 02:05 PM
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Originally Posted by Gicknordon View Post
looks like your drivers side spring pack is arched the wrong way. Could be worn out springs
That makes sense...now I am wondering why that thought did not occur to me when I was looking at it. Sometimes I over think and over complicate things.
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Old 07-15-2014, 02:20 PM
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This is on your 55, right? Looks normal to me. I had the same question when I first got into these trucks. The springs aren't very arched on the mid-50's and the square taper on the one leaf is correct. Not saying they aren't beyond new but the only way to really know is to disassemble the spring pack and check for cracks, etc. If you are replace with posies you can't use the stock bumper anyway (if memory serves correct). Check with Mid50 and they can confirm that. I always think the driver side is "sprung" more is because it tends to carry more weight over it's life versus the passenger side.
Click the image to open in full size.
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Old 07-15-2014, 02:24 PM
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Is it just me, the angle of the pictures... or is the drivers side shock compressed a LOT more than the passenger side? Could this be a combination spring and shock problem?
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Old 07-15-2014, 02:39 PM
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If there were large sized people driving the truck over the past 6o or so years that can cause a drivers side slump
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Old 07-15-2014, 02:49 PM
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Quote:
Originally Posted by oldwi View Post
I have been considering lowering the front of my truck using Posie Dualflex springs
Just something to ponder! If your springs are old and worn they may already be sagging. I've know several folks that have installed dropped springs and their ride either stayed the same of even got higher!!! Here's some info to maybe help you decide where your truck truly stands.

http://www.clubfte.com/users/earl/Re...%20Information
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Old 07-15-2014, 03:21 PM
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Quote:
Originally Posted by teardropty View Post
This is on your 55, right? Looks normal to me. I had the same question when I first got into these trucks. The springs aren't very arched on the mid-50's and the square taper on the one leaf is correct. Not saying they aren't beyond new but the only way to really know is to disassemble the spring pack and check for cracks, etc. If you are replace with posies you can't use the stock bumper anyway (if memory serves correct). Check with Mid50 and they can confirm that. I always think the driver side is "sprung" more is because it tends to carry more weight over it's life versus the passenger side.
Click the image to open in full size.
It is on my 55. I have decided to go with MidFifty "short and smooth" lowering springs instead of the Posie dualflex. I am not going to do the down and forward version in an effort to avoid swapping out the oil pan on my 289 with some type of semi rear sump. I just spoke with Midfifty and they said the stock bumper stops will work fine with their springs. I anticipate not getting a full 3" drop from the current ride height just due to fact the existing springs already probably have some drop from age. I am hoping for about 1.5" drop when I am done. Doing that and lowering my rear by about 4" should give me the stance I am looking for and I suspect dramatically improve my ride. Currently the truck has stock leaf plus coil overload springs on the rear so I think it could haul more than what is safe before bottoming out.
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Old 07-15-2014, 03:46 PM
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Quote:
Originally Posted by 4tl8ford View Post
If there were large sized people driving the truck over the past 6o or so years that can cause a drivers side slump
And a skinny man with a fat wife will cause a passenger side slump.
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Old 07-15-2014, 04:20 PM
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And a skinny man with a fat wife will cause a passenger side slump.
I am neither a skinny man nor am I crazy enough to comment on what may or may not sit to the right of me..... just sayin'
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Old 07-20-2014, 02:47 PM
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Posie's dualflex on the front is a good choice. They work well on my '50 F2 and several others on here have used them also. Posie's make their own springs in a separate shop near Hummelstown, PA. The spring design employs modern metal design & heat treating techniques.

Whatever you do I would make sure that you remove the extra rubber snubber. That may be why your spring is sagging on one side.

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Old 07-20-2014, 03:14 PM
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That's not an "extra" bumper, AFAIK they are stock on an F100. I have them on my 56. Personally I am not fond of the mono or dual leaf springs. Lots of reports of spring wrap up, unhappy users. Worn out spring eye bushings shackle pins can cause one side to sag.
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Old 07-20-2014, 03:31 PM
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Quote:
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That's not an "extra" bumper, AFAIK they are stock on an F100. I have them on my 56. Personally I am not fond of the mono or dual leaf springs. Lots of reports of spring wrap up, unhappy users. Worn out spring eye bushings shackle pins can cause one side to sag.
I could see that on the rear which is probably why Posies doesn't make them for the rear. You have to go with SuperSliders. You are correct in some applications like the '67-69 Camaros which used that spring design in the rear. Big, powerful engines transferring torque to the rear did not help. But IMHO they should not be a problem using them in the front . . . unless it is a 4x4 MH . . .
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Old 07-20-2014, 05:28 PM
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I do know people who have put monos on the front and absolutely hated them. They can wrap on the front and chatter under braking same as rears do under acceleration just on the other end of the spring.
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