I have 2003 Excursion and I have a vibration that shakes the steering wheel very strongly and is very loud between 50 and 65 mph. I had to replace the ball joints so I have replaced a lot of stuff on the way in and out. I have upgraded to dual fox 2.0 steering stabilizer setup, rebuilt the axles with new seals and ujoints, new ball joints, new hub bearing assemblies, new warn premium hub assemblies. I have new rims and tires and have had an alignment done, i have removed the front driveshaft to rule it out as a cause for the vibration. What ideas do you all have as to where to look next? a couple of ideas floating around in my head are the rear drive shaft being out of balance, a bad rear drive shaft u-joint, rear pinion yolk bearing being bad, and someone mentioned a cracked flywheel? Would it hurt the vehicle to take off rear driveshaft and put on front and put it in four wheel high and drive up to that speed and see if the vibration goes away? Any help would be great guys... thanks!
With your tire size and the speed range I would check balance again. Most common at 60-70mph but it is a cheap fix.
1986 Suzuki Samurai with VW 1.6TD 30 MPG on 30 inch tires
Early 1986 (1985) F250 Supercab stock 6.9 bought with 70,000 miles in 2008. Stock skinny wheels and stock 3:55 limited slip axles. Rebuilt trans with E40D first and second gears. SOLD
1999 F350 Dually 6spd manual trans. Banks exhaust, Modded impellor and Big Head Waste gate, DP TUNER flashed PCM, Full Force Diesel Single Staged Injectors. EBPV mod for exhaust brakes. Hutch Mod to gas tank. SOLD/TRADED
2001 Excursion Limited Auto trans many buttons I still am finding. Factory 3 inch lift low mileage. 100% stock today we will see what tomorrow brings.
2003 Ford Excursion
6.0L PSD with 224,XXX+ Miles
Scangauge II w/ BlendMount Kit
Sinister Coolant Filter
+40hp FICM tune / No turbo-lag
MBRP 4" Turbo-Back straight piped
New HPOP 205k, FICM referb @215k, everything else original & stock
Brand new adjustable trackbar and bushings got installed with the new suspension.. Bolt had to be torqued to almost 400ft/lb.... Today I reinstalled the front driveshaft and locked the front hubs removed the rear driveshaft and put it in 4wheel drive, vibration is gone, I am going to drop my drive shaft off and get it checked at the local diesel driveline shop. It's just so weird that the vibration in the steering wheel was able to travel up through the tcase, trans and engine through the steeringwheel! I guess ill see what the driveshaft people say, the rear pinion felt good when i jerked around on it.
That's why I had such a hard time figuring out where the vibration was coming from... Ultimately... Running the vehicle in 4wd with no rear drive shaft helped me to isolate the issue to the rear shaft or axle and fortunately it was the driveshaft... Funny thing is that the guy I bought it from had just replace the rear shaft unjoints last year but did not get the shaft balanced... This must have caused premature failure of the new ujoints... And the fact that I knew he had replaced them already even lea me further in the wrong direction... But it's riding good now so I am relieved!
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