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Old Yesterday, 10:33 AM   #1
captgriz
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coil springs

can anyone tell me if there are right and left coil springs. i didnt think it made a difference, but my passenger side coil spring rubs the front side of the upper coil bucket. it is a 2.5 inch lift. thank you for any input.

griz
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Old Yesterday, 12:36 PM   #2
langester
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Should be the same. Have you checked the coil cups on the top of the radius arm. Sometimes they get bent out of shape and cause the springs to do strange things. Good luck with it!

1972 Bronco "Spawn" 5.0, carb, NP435, Dana 20 twin stick, 3.5" lift, Bilsteins, 1" body lift. 33x12.5x15's on 15x10 rims. 4.11 gear ratio, wrap trap, 4x4x2 steering box, f150 knuckles and disc front, drum rear, vacuum booster, Rampage soft top, built my cage and bumpers, 23 gallon rear tank.
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Old Yesterday, 02:17 PM   #3
DirtDonk
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Correct. No left and right spring on Broncos, like there are on some vehicles.
And since every Bronco is different, you may also be suffering from stacked tolerances.

Even with just a 2.5" lift you are shifting your entire axle towards the driver side, if you do not install a dropped trackbar bracket and dropped pitman arm.
That shift is usually not enough to cause a problem with 2.5" which is why it's still considered "not necessary" for lifts below 3 inches.

Plus, as mentioned your lower coil cup could be deformed from just general use over the last 50 years or so. Even the coil tower can be tweaked from use over the years.
There is always the possibility of a slightly deformed spring. But I've yet to hear of that happening, so it would be low on my list of suspects.

The other thing is the springs also bow out towards the front when a Bronco is lifted. This is because the radius arm design tilts the axle forward on the top, tilting the springs forward in the middle. This bowing can also impart a bit of twist to the coils, causing them to bow inward toward the frame as well.
Stacked tolerances...

Paul

'71 Wagon, 3.5" WH, F150 disc brakes and steering, 4.11 33x11.50 Thornbirds, Kayline soft top, Hanson bumpers. "Built, not bought"

'68 LUBR, 2.5 + 1 WH, 31x10.50, 4.56, Explorer and 4R70w by EFI Guy, WH disc brakes, Hanson front bumper, Warn winch. "Bought, not built"

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