Can't figure out this hum! - Ranger-Forums - The Ultimate Ford Ranger Resource


General Ford Ranger Discussion General discussion of the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-09-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
Can't figure out this hum!

It sounds like a loud tire kind of hum, like I have massive tread, but I don't, It started a couple weeks ago when I put these stock tires back on (tore off 33s, but that's another story,) but they have maybe 2000 miles on them. It increases with speed, not rpms. It sounds like the front passenger tire. I jacked it up and checked for play, thinking bearing, but it doesn't budge. It's not pulling, it tracks straight. I had it aligned about a month ago, and everything looks straight. If I turn right hard enough (as if taking weight off the tire,) the sound stops completely. I swapped front and rear passenger tires a week ago, and it seemed a little better for about a day, and was bad again, so I may have just been imagining things. Everything seems legit but it's an obnoxious hum, and I can't figure it out. Please help!
Reply With Quote
  #2  
Old 09-09-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
anyone?
Reply With Quote
  #3  
Old 09-09-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
bump
Reply With Quote
  #4  
Old 09-09-2009
hozII's Avatar
Member
iTrader: (5)
 
Join Date: Sep 2008
Location: athens, Al
Posts: 2,245
sounds like a bad tire.
Reply With Quote
  #5  
Old 09-09-2009
Toms994x4's Avatar
Member
iTrader: (4)
 
Join Date: Jul 2009
Location: Sanford, NC
Posts: 1,300
How long did the stock tires sit? The "new" Ranger I bought has 31's on it but you'd think it was some Swampers. Even though you don't have an aggressive tread, it doesn't mean your tires won't be loud.
Reply With Quote
  #6  
Old 09-09-2009
KLC's Avatar
KLC KLC is offline
RF Veteran
iTrader: (29)
 
Join Date: Nov 2007
Location: New Mexico
Posts: 13,115
Did you store them outside? It might be that the tires are weathered and dry rotted from the elements and/or age. Although this doesn't explain why the noise is only coming from a particular location.
Reply With Quote
  #7  
Old 09-09-2009
Ford04Ranger4.0's Avatar
Member
 
Join Date: Dec 2008
Location: Plattsburgh, New York
Posts: 3,390
could the tire be cuped from miss alingment?
Reply With Quote
  #8  
Old 09-10-2009
morris's Avatar
RF Veteran
iTrader: (5)
 
Join Date: Feb 2008
Location: South Detroit.
Posts: 7,833
i'd also guess a bad tire. the belts could be broken and you don't see it.
Reply With Quote
  #9  
Old 09-10-2009
Toms994x4's Avatar
Member
iTrader: (4)
 
Join Date: Jul 2009
Location: Sanford, NC
Posts: 1,300
Roll the tire on a flat surface and see if it tracks true.
Reply With Quote
  #10  
Old 09-11-2009
Coleosis85's Avatar
Member
 
Join Date: Aug 2009
Location: OKC, Ok
Posts: 439
My ex had a cracked hub once....it hummed.
Reply With Quote
  #11  
Old 09-11-2009
FullThrottle02's Avatar
Member
iTrader: (3)
 
Join Date: Apr 2008
Location: McHenry,IL
Posts: 586
Run your hands down the inside and outside edges of the tires to check for cupping/chopping. If they are badly chopped they will hum or roar depending on how bad. A broken belt may also cause this. A bearing could still be bad even if it doesn't have play in it too.
Reply With Quote
  #12  
Old 09-14-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
I flipped all the tires from left to right and right to left. The sound still goes away when I turn right just as before. The truck is tracking straight.

The tires sat, mounted on rims, with about 15-20 lbs pressure in them, for around a year and a half in my basement. There is no noticeable cracks or dry rot that I could see, but if I switched the tires left to right and it sounds the same and still goes away when I take weight off the right side, ie turn right.

I would think if a bearing was bad enough to make this kind of sound, it would be causing quite a but of drag and pulling to that side. but maybe not? At 40 mph, it's loud enough I have to speak up while talking on the phone.

I think next thing I'm going to do is drop my rear drive shaft and drive around in fwd and see if it goes away, that takes that out of the equation.
Reply With Quote
  #13  
Old 09-14-2009
hozII's Avatar
Member
iTrader: (5)
 
Join Date: Sep 2008
Location: athens, Al
Posts: 2,245
Quote:
Originally Posted by TRoyBv6320 View Post
I flipped all the tires from left to right and right to left. The sound still goes away when I turn right just as before. The truck is tracking straight.

The tires sat, mounted on rims, with about 15-20 lbs pressure in them, for around a year and a half in my basement. There is no noticeable cracks or dry rot that I could see, but if I switched the tires left to right and it sounds the same and still goes away when I take weight off the right side, ie turn right.

I would think if a bearing was bad enough to make this kind of sound, it would be causing quite a but of drag and pulling to that side. but maybe not? At 40 mph, it's loud enough I have to speak up while talking on the phone.

I think next thing I'm going to do is drop my rear drive shaft and drive around in fwd and see if it goes away, that takes that out of the equation.
eh yeah im kinda leanin towards a wheel bearin now......hmmm...lol
Reply With Quote
  #14  
Old 09-15-2009
DrMacZed's Avatar
Member
 
Join Date: Sep 2007
Location: Corvallis, Oregon
Posts: 92
Quote:
Originally Posted by TRoyBv6320 View Post
The sound still goes away when I turn right just as before.
I am with HozII. That statement points pretty clearly toward wheel bearings.
Reply With Quote
  #15  
Old 09-16-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
here's a vid accelerating from 20ish to 40ish. windows up, air off. When the sound goes away that's me swerving right then left, twice.
Reply With Quote
  #16  
Old 09-18-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
did anyone see my video!?^
Reply With Quote
  #17  
Old 09-18-2009
--weezl--'s Avatar
Member
iTrader: (1)
 
Join Date: Sep 2009
Location: Calgary AB, Canada
Posts: 3,139
i hear no sound, DO NOT take your rear driveshaft out and drive around, that is begging to need a new t-case, the front of the driveshaft, infront of the front u-joint is not bolted in, it is held in by angle of the driveshaft, and the length, against the rear diff, if you take it off at the u-joint, the slip yoke (i think this is what it's called) can and probably will slide out of the t-case which will then make you dump out all of your t-case fluid

also, don't ever run your hand over a tire, trying to feel for cupping or anything like that, without a glove, too many times i have seen a nice big piece of glass stuck in a racing slick, or a belt sticking out that has sliced someone's hand open (we used to have to wipe the tires off with a glove before every race at the drag strip)
Reply With Quote
  #18  
Old 09-20-2009
FullThrottle02's Avatar
Member
iTrader: (3)
 
Join Date: Apr 2008
Location: McHenry,IL
Posts: 586
There is a possibility that the tires are flat spotted from sitting without use for so long without the proper air pressure. This should go away after some time though. Maybe they are so bad that they will need to be replaced.
Reply With Quote
  #19  
Old 09-20-2009
darkstar_420's Avatar
Member
 
Join Date: Feb 2008
Location: sk
Posts: 621
sounds like you have no grease in your bearings. you will not always find play in a bearing that is shot but if it is noisy as you described, and when you turn right the noise goes away, im willing to bet that you have a wheel bearing gone.
Reply With Quote
  #20  
Old 09-20-2009
Toreador4x4's Avatar
Member
iTrader: (6)
 
Join Date: Apr 2007
Location: Livonia, MI
Posts: 3,958
you got a wheel bearing thats bad, the tcase on our trucks does not have a slip yoke, but it still isnt advised to drive without a rear driveshaft. put all 4 tires off the ground, have someone in the truck with it in 4x4 and have them run it up to speed while you use a stethoscope or vacuum line to listen to the wheel bearings. they are not too fun to replace with PVH
Reply With Quote
  #21  
Old 09-20-2009
--weezl--'s Avatar
Member
iTrader: (1)
 
Join Date: Sep 2009
Location: Calgary AB, Canada
Posts: 3,139
Quote:
Originally Posted by Toreador4x4 View Post
you got a wheel bearing thats bad, the tcase on our trucks does not have a slip yoke, but it still isnt advised to drive without a rear driveshaft. put all 4 tires off the ground, have someone in the truck with it in 4x4 and have them run it up to speed while you use a stethoscope or vacuum line to listen to the wheel bearings. they are not too fun to replace with PVH



I'm not trying to start anything here, but that is dangerous.... leaning over a spinning hub? not to mention that if it goes away around a right corner (still has weight on it) you aren't going to hear it at all, with no tires or ANY weight on the bearing... find a mechanic friend to take it for a drive and pay him a case of beer for his thoughts
Reply With Quote
  #22  
Old 09-20-2009
Toreador4x4's Avatar
Member
iTrader: (6)
 
Join Date: Apr 2007
Location: Livonia, MI
Posts: 3,958
you wont be leaning over anything, the tires will be on and you will be underneath. just trying to help you diag this yourself. At work (Ford dealership) we diag them the same way, just on a hoist instead of on jackstands. and the weight of the tire will be pulling on the bearing
Reply With Quote
  #23  
Old 09-22-2009
TRoyBv6320's Avatar
Member
Thread Starter
 
Join Date: Apr 2007
Location: Olathe, KS
Posts: 220
They had around 20-25 psi in them and they were on their side. I've put around 1000 miles on them and the sound hasn't gotten any better

I have jacked the whole thing off the ground, and the sound goes away. Maybe with a redneck stethoscope like a vacuum hose or long screw driver, I could hear something.

One important thing I left out, when I jacked all four wheels off the ground and clicked it in 4wd, all the tires would start to spin, but then the front right would slow and eventually stop. It was not hard to spin, but I guess harder than the rest. That would make me think that wheel bearing was out, but the normal signs of a worn bearing were not there. I hate to drop $300ish if it doesn't solve the problem, I would like to be certain.

Last edited by TRoyBv6320; 09-22-2009 at 08:53 PM.
Reply With Quote
  #24  
Old 09-22-2009
Toreador4x4's Avatar
Member
iTrader: (6)
 
Join Date: Apr 2007
Location: Livonia, MI
Posts: 3,958
hold one tire stopped while someone listens to the other and vise versa, or find two ranger spares to put on the front and drive it
Reply With Quote
  #25  
Old 09-23-2009
--weezl--'s Avatar
Member
iTrader: (1)
 
Join Date: Sep 2009
Location: Calgary AB, Canada
Posts: 3,139
Quote:
Originally Posted by TRoyBv6320 View Post
They had around 20-25 psi in them and they were on their side. I've put around 1000 miles on them and the sound hasn't gotten any better

I have jacked the whole thing off the ground, and the sound goes away. Maybe with a redneck stethoscope like a vacuum hose or long screw driver, I could hear something.

One important thing I left out, when I jacked all four wheels off the ground and clicked it in 4wd, all the tires would start to spin, but then the front right would slow and eventually stop. It was not hard to spin, but I guess harder than the rest. That would make me think that wheel bearing was out, but the normal signs of a worn bearing were not there. I hate to drop $300ish if it doesn't solve the problem, I would like to be certain.
if the front tires stop, that would mean to me the t-case is f-bombed...
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Can someone help me figure out what axle this is? DallyBoy09 Drivetrain Tech 1 10-12-2009 11:34 AM
i CAN'T figure out what to do next Tys 4x4 FTW General Ford Ranger Discussion 18 01-06-2009 02:09 AM
Can anybody figure out what this is? 06sport2WD General Ford Ranger Discussion 5 01-03-2009 03:01 PM
Door Lock Question, Can't Figure This Out! 05RangerXLT General Technical & Electrical 6 08-02-2007 04:07 PM
I can not figure this out for the life of me 9XLT8 General Ford Ranger Discussion 11 10-04-2005 05:57 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 11:14 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.