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  #1  
Old 08-04-2010, 10:49 AM
Chris Chris is offline
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Default Vibration in the rear-end

At about 55-60 MPH sometimes even at lower speeds but not all the time, I have a vibration that shakes as if the tires are out of balance. I just had brand spanking new tires put on my truck, they are Mastercraft Courser MT's. I had new tires put on because my previous tires were doing the same thing. I had these tires balanced, when they were mounted. However I still have a vibration. Any ideas what this could be? I had the tires for a bit and they had water in them, but I was pretty sure I got all the water out of them.
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  #2  
Old 08-04-2010, 10:52 AM
sgtsandman sgtsandman is offline
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Default Re: Vibration in the rear-end

Have you checked your drive shaft for a bad u-joint? You might need to drop the shaft to check them, it isn't always obvious from just looking at them or twisting the shaft by hand.

If that is good you might have a bad bearing at one of the wheels or in the differential.
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  #3  
Old 08-04-2010, 10:53 AM
05RangerEdge 05RangerEdge is offline
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Default Re: Vibration in the rear-end

They are MT's I would expect that. Even balanced I'm sure they are not gonna be consistent.
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  #4  
Old 08-04-2010, 11:04 AM
Chris Chris is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by 05RangerEdge View Post
They are MT's I would expect that. Even balanced I'm sure they are not gonna be consistent.
Expect it to feel like the ass end is hopping? The front doesn't do this, and as I previously said my old Bridgestone H/T's that were worn out did this to. I was just trying to figure out if it was maybe a issue with the actual tires, or the drive train. I've been told by one person I could have a bent axle? I don't recall doing anything to bend an axle, and I was told if it was a bent rim they would of never gotten them balanced correctly, and be able to tell me it was bent. I suppose it could be the fact I've got a long wheel base single cab ranger, but I didn't notice this with my old A/T's which were smaller then these, they are 245's where these are 265's.
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White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
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  #5  
Old 08-04-2010, 11:09 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by sgtsandman View Post
Have you checked your drive shaft for a bad u-joint? You might need to drop the shaft to check them, it isn't always obvious from just looking at them or twisting the shaft by hand.

If that is good you might have a bad bearing at one of the wheels or in the differential.
X2 on the u-joint.
Quote:
Originally Posted by 05RangerEdge View Post
They are MT's I would expect that. Even balanced I'm sure they are not gonna be consistent.
i dont believe that just because they are mud tires that they should vibrate. my BFG Muds are smooth as glass on the road.
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  #6  
Old 08-04-2010, 11:14 AM
Chris Chris is offline
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Default Re: Vibration in the rear-end

Thanks for the quick replies, but shouldn't u-joints make noise? My last one that went out squeaked like crazy.

Bad bearing at the end of my wheels? I suppose that could be it. The differential could also be bad. How can I tell without having to rip into the sucker, 101 degrees and feels like 130, so not something I'd wanna start in to.
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2004 Ford F150 Automatic FX4 SuperCrew 5.4L 3V Triton V8, No Muffler, true dual straight pipes, 3.73 Gears, 18" rims with Wrangler A/T's
White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
White 1997 Ford Expedition XLT 3inch Suspension lift, 38 Firestone M/T's 98 4.6L Police Interceptor high flow injectors, Super 44, brand new rebuilt transmission, with 3.73 gears(Not mine no more)
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  #7  
Old 08-04-2010, 11:17 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by Chris View Post
Thanks for the quick replies, but shouldn't u-joints make noise? My last one that went out squeaked like crazy.

Bad bearing at the end of my wheels? I suppose that could be it. The differential could also be bad. How can I tell without having to rip into the sucker, 101 degrees and feels like 130, so not something I'd wanna start in to.
u joints dont always make noise when they are bad, in fact the last couple that i replaced made no noise before they started to vibrate.
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2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #8  
Old 08-04-2010, 11:21 AM
sgtsandman sgtsandman is offline
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Default Re: Vibration in the rear-end

Not always on the u-joints, sometimes they just kinda freeze up.
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  #9  
Old 08-04-2010, 11:28 AM
Chris Chris is offline
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Default Re: Vibration in the rear-end

That could also explain my transmission slamming into reverse off an on. I'll check that first.
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2004 Ford F150 Automatic FX4 SuperCrew 5.4L 3V Triton V8, No Muffler, true dual straight pipes, 3.73 Gears, 18" rims with Wrangler A/T's
White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
White 1997 Ford Expedition XLT 3inch Suspension lift, 38 Firestone M/T's 98 4.6L Police Interceptor high flow injectors, Super 44, brand new rebuilt transmission, with 3.73 gears(Not mine no more)
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  #10  
Old 08-04-2010, 12:29 PM
Chris Chris is offline
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Default Re: Vibration in the rear-end

Sorry for double posting, but I also had new brakes put on my truck, all the way around. I notice a hop in my ass end when slowly applying my brakes, the wheels don't hop like the ABS is kicking in, but its almost like the brakes are having trouble staying in one spot, and are hopping in the rear, could this be related, and does this information help in anyway, or do you guys still think its the u-joints?
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2004 Ford F150 Automatic FX4 SuperCrew 5.4L 3V Triton V8, No Muffler, true dual straight pipes, 3.73 Gears, 18" rims with Wrangler A/T's
White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
White 1997 Ford Expedition XLT 3inch Suspension lift, 38 Firestone M/T's 98 4.6L Police Interceptor high flow injectors, Super 44, brand new rebuilt transmission, with 3.73 gears(Not mine no more)
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  #11  
Old 08-04-2010, 05:33 PM
Ron0104 Ron0104 is offline
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Default Re: Vibration in the rear-end

Chris, maybe the below will help you, because I am working on a similar problem……
And please pardon the lengthy reply, but I wanted to show the whole sequence of potential problems I have worked through.

A little background:- I bought my Ranger with 80 k miles on and have since run up to 140k. Over time it developed a similar vibration to your Ranger, except mine is between 60 and 70 mph.
The vibration feels like it is coming from the rear wheels.

Here is the sequence of fixes I have tried so far.

1) I bought and fitted new shocks and this improved the ride a lot (the rear ones were in bad shape), but the vibration remained.

2) Next I fitted a set of Firestone Firehawk’s, the old tires were badly worn due to the previous owner not rotating them. Vibration remained.

3) Inspecting the prop-shaft (my Ranger is 2 WD), I saw at the front universal joint a “trace” of rust flung around the under - body which led me to believe the universal joint was bad. I had both U-joints replaced by a shop because I did not have access to a press. Vibration remained.

4) I inspected the prop-shaft again, and saw (why I missed it the first time and the shop did not see it as well???) that the front yoke, which has a rubber damper ring, was also worn. The rubber in the damper had become brittle and I had to buy the yoke from Ford. Changed it out and yes the vibration remained!

5) At that point I decided to take the truck to a prop-shaft balancing shop. I explained what the problem was and they told me it is impossible that it is prop-shaft balancing. They were kind enough to lift the rear of the vehicle with a jack and took the free-wheeling wheels to 65 mph. At that point we noticed a “flutter” on the RH rear wheel, the exhaust was bouncing along with the flutter. LH wheel was good, no “flutter”. I assured them that the wheels had been re-balanced the week before, so they suggested I rather change the wheel bearing. I changed them (both LH and RH) last weekend. Inspected the bearing surfaces on the axle shafts and all was good. The RH bearing did feel like it had a “rough” rotation, so I thought it was bad. And the vibration was still there!!!

6) Yesterday I loaned a dial indicator from our Maintenance shop at work, lifted the rear and set the dial indicator to run on the outer edge of the RH wheel (mine are the pressed steel type). And no run out.

So that is where I am now, what ever caused the damage to the RH rear bearing is still there. I loaded the truck with about 600 lbs, and then noticed the vibration is worse with a load on. Vibration remains the same in 4th and 5th gear, also in neutral, engine idling.
My next angle of approach will be:- going back to the prop-shaft balancing shop and ask them to remove the prop-shaft and balance it with yokes. It has been worked on twice, just maybe it is out of balance.
I will keep you posted on my progress; maybe it will help you as well.
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  #12  
Old 08-04-2010, 08:38 PM
Chris Chris is offline
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Default Re: Vibration in the rear-end

Mine seems to come as I am traveling down the road and on the gas. As I have no cruise.
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White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
White 1997 Ford Expedition XLT 3inch Suspension lift, 38 Firestone M/T's 98 4.6L Police Interceptor high flow injectors, Super 44, brand new rebuilt transmission, with 3.73 gears(Not mine no more)
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  #13  
Old 08-11-2010, 07:40 AM
Chris Chris is offline
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Default Re: Vibration in the rear-end

Still having this issue. Any more ideas?
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2004 Ford F150 Automatic FX4 SuperCrew 5.4L 3V Triton V8, No Muffler, true dual straight pipes, 3.73 Gears, 18" rims with Wrangler A/T's
White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
White 1997 Ford Expedition XLT 3inch Suspension lift, 38 Firestone M/T's 98 4.6L Police Interceptor high flow injectors, Super 44, brand new rebuilt transmission, with 3.73 gears(Not mine no more)
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  #14  
Old 08-11-2010, 12:04 PM
ZWilson07 ZWilson07 is offline
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Default Re: Vibration in the rear-end

hey man, Idk if this will help you much but I was having a similar issue in my 06. ive got tires balanced, replaced driveshaft end, new u joints, even u joints professionally done and driveshaft balance, and even to this day I have alil bit at those speeds. It might just be the truck thing. I just kinda learn to deal with it, just like clunking in between gears sometimes from the driveshaft, prolly something you might just have to get used to. Like I said this prolly wont help you problem much but dont worry ur not alone lol I just learn to deal with things.
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  #15  
Old 08-11-2010, 12:51 PM
Chris Chris is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by ZWilson07 View Post
hey man, Idk if this will help you much but I was having a similar issue in my 06. ive got tires balanced, replaced driveshaft end, new u joints, even u joints professionally done and driveshaft balance, and even to this day I have alil bit at those speeds. It might just be the truck thing. I just kinda learn to deal with it, just like clunking in between gears sometimes from the driveshaft, prolly something you might just have to get used to. Like I said this prolly wont help you problem much but dont worry ur not alone lol I just learn to deal with things.
Your post helps a lot.

I was wondering though when I was attempting to check my rear brakes I chipped a piece of the actual drum off. Could that cause things to run off balance being that the piece is missing? It wasn't really an important piece, it was just the back side of it. If so I may just go grab a new drum from the junk yard.
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2004 Ford F150 Automatic FX4 SuperCrew 5.4L 3V Triton V8, No Muffler, true dual straight pipes, 3.73 Gears, 18" rims with Wrangler A/T's
White 2004 Ford Ranger XL, Auto, 4.0 SOHC, 4x4 Base Model, 16" Explorer Rims. 3.73 Gears, No muffler(Sold)
White 1997 Ford Expedition XLT 3inch Suspension lift, 38 Firestone M/T's 98 4.6L Police Interceptor high flow injectors, Super 44, brand new rebuilt transmission, with 3.73 gears(Not mine no more)
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