Royal Rumble - Ford Powerstroke Diesel Forum
Non-Powerstroke General Discussion General Discussion for 6.9L and 7.3L IDI (Non-Powerstroke) Engines

 
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post #1 of 8 Old 11-03-2009, 05:11 PM Thread Starter
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Question Royal Rumble

I've noticed since I got my IDI, before & after the "Big Fix", it's had a rumble or I guess a vibration between 65-75mph. I've replaced the u-joints in the rear driveshaft & front axle(haven't touched the front driveshaft yet, but I'm sure that wouldn't be the cause). I was wondering if it could possibly be the tires. I've got BFG Commercial T/A 245/75R16s on it & I don't know how many miles the previous owner drove on them, but they're in really good shape & have no other signs of damage. The tread looks semi-aggresive. It's more like a snow tread than an all-season tread but they don't "hum" it just vibrates. If you don't think it's the tires, what else should I try?

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Last edited by RadarRider; 11-03-2009 at 05:16 PM. Reason: I farted.
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post #2 of 8 Old 11-03-2009, 05:17 PM
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Well it could be the tires. Mine vibrate at speed because of my tread.

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post #3 of 8 Old 11-03-2009, 05:20 PM
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Have you had the tires/wheels balenced?
that is almost always what causes a vibration at 60+mph

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post #4 of 8 Old 11-03-2009, 05:24 PM Thread Starter
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Originally Posted by RRonning1984 View Post
Well it could be the tires. Mine vibrate at speed because of my tread.
But do you get a hum or vibration, Ryan?
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Originally Posted by dalton1 View Post
Have you had the tires/wheels balenced?
that is almost always what causes a vibration at 60+mph
I haven't gotten the tires balanced as the previous owner said he had it done when he had the tires put on. I have no idea how long ago that was. The other thing is, the vibration kinda goes away @ 80ish. Still there but NOTHING like 65-75mph.

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post #5 of 8 Old 11-03-2009, 05:44 PM
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A vibration that comes and goes at different speeds can be tires. I had a vibration in my 2.3 Mustang and come to find out one of the U-joint clip came out and let the cap walk outward causing a 1/16th of an inch of play and it would shake the whole car at 65 mph.

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post #6 of 8 Old 11-04-2009, 04:39 AM Thread Starter
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Quote:
Originally Posted by Mototime2000 View Post
A vibration that comes and goes at different speeds can be tires. I had a vibration in my 2.3 Mustang and come to find out one of the U-joint clip came out and let the cap walk outward causing a 1/16th of an inch of play and it would shake the whole car at 65 mph.
After you posted this, I double & triple checked my u-joints last night. 1st I checked the u-bolts that hold the rear u-joint in & they were OK. I also checked the lock rings on the front & rear u-joint & they were all OK. Then I got crazy & pulled the driveshaft out to make sure both u-joints didn't have any resistance & everything checks out fine. I reinstalled the driveshaft & took it for a quick ride on the highway & I'm still getting the same thing. The next thing I'm gonna try is flushing out/refilling the diffs. That's another thing that came to mind. If it's not this, the tires have to be the culprit.

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TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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post #7 of 8 Old 11-06-2009, 03:04 AM
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Before you mess with the diffy's, I'd take it in and have the balance on your tires checked out. As tires wear down, their balance can change. Also, they might have been in balance, and you could have thrown a weight or two. (I've had this happen a lot, especialy with the smaller weights)

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post #8 of 8 Old 11-06-2009, 01:48 PM Thread Starter
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Originally Posted by cndrm View Post
Before you mess with the diffy's, I'd take it in and have the balance on your tires checked out. As tires wear down, their balance can change. Also, they might have been in balance, and you could have thrown a weight or two. (I've had this happen a lot, especialy with the smaller weights)

mike
I'll give it a try. Thanks, man!

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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