1999 f150 howling!!!
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1999 f150 howling!!!
I have a 1999 f150 supercab 4x4 with 99000kms on it. about 6 months ago I started noticing a howling noise right around 80km/hr (start around 75 end about 85) The tires were original so i thought it was them, The guy i bought the tires from thought i had a bad front drivers side wheel bearing so he changed that along with the tires. With the new rubber on you can here the howl even more now. It seems to be coming either from the rear diff or possibly the tranny/transfer case area, it resonates so it almost kind of comes from everywhere! Just wondering if anybody else has heard of this problem.
Just to note: its got the 5.4 V8 and stock drivetrain.
great website.
Just to note: its got the 5.4 V8 and stock drivetrain.
great website.
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To the first question, the tires are BFG TAs 265/85/R16s no more aggressive then the wranglers that came stock.
Second question, It makes no difference when you turn but it does go away when you let off the gas. (goes away) That makes me think maybe transmission? Or would you think the diff under load from the drivetrain would cause it? it just sounds like a bearing howling but from where i have know idea, all the fluids were checked when the new tires were installed (diff, tranny, transfer etc) all fluid looked good and the levels were good and no metal was detected. Any other questions would be greatly appreciated.
hiboy.
Second question, It makes no difference when you turn but it does go away when you let off the gas. (goes away) That makes me think maybe transmission? Or would you think the diff under load from the drivetrain would cause it? it just sounds like a bearing howling but from where i have know idea, all the fluids were checked when the new tires were installed (diff, tranny, transfer etc) all fluid looked good and the levels were good and no metal was detected. Any other questions would be greatly appreciated.
hiboy.
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No it didn't pull, When i got the tires changed they also did my brakes (rotors and pads) all around, when the shop was working on that side the guy noticed the bearing was noisy and just didn't feel right. the guy doing the work is a friend and deals with this kind of thing all the time so I put some faith in him and told him to change it.
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From: Wyoming
I'm getting a vibration too, and was thinking about wheel bearings, but I figured if one was going bad the truck would pull that way. I did a search on vibration on this forum this morning, and found some good threads. Driveshafts were the culprit in a few cases, and not only the shaft balance but the length. In my case I'm going to check out Ujoints next.
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I have had vibrations in a 1990 Ranger 4X4 which turned out to be ujoints pretty easy to tell if they are sloppy. My drivetrain all seems tight just this 80KM Howl/whine whatever you want to call it. Very annoying!
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From: North Bay, ON
howl at 80kph
If you have the BF TA All Terrains or the BF Commercial TA Tractions, they could produce a howl on dry pavement at that speed. All of the other TAs 'look' like they would be quiet. If your truck came with the standard Goodyear Wrangler RT/S tires, then any more aggressive tread can produce some noise. I put the Wrangler MT/R tires on my pickup, and on corners and dry pavement, I hear them. On slow speed cornering while braking, I feel them too. Other possible causes of howling are the diffs, and wind resistance in some area of the body. U joints and bearings are usually an on/off sound. A wheel that is not fully tightened can produce the same sound as u joints. I have not yet heard an automatic transmission or transfer case produce a howling sound, but that doesn't mean it can't. These are about all I can think of.
Thom
Thom
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From: BC, Canada
Since the noise goes away when you let off the throttle, I'd almost be willing to bet that you have bad pinion bearings in the rear diff. I've done lots of these.
To check the bearings you can remove the rear driveshaft, raise the rear wheels off the ground, then spin the pinion yoke (flange) very slowly. If it feels notchy or rough you've found your problem.
The noise a bad wheel bearing makes will typically change when you turn the steering back and forth while you're driving.
To check the bearings you can remove the rear driveshaft, raise the rear wheels off the ground, then spin the pinion yoke (flange) very slowly. If it feels notchy or rough you've found your problem.
The noise a bad wheel bearing makes will typically change when you turn the steering back and forth while you're driving.
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Thanks to racer guy and all the rest. You guys are thinking along the same lines as i am. I recently moved and am without garage right now, Living in Canada means nicer weather is right around the corner so i will look a little closer at everything especially the pinion bearings. I'll say it again, excellent website.
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From: Loxley,AL
I agree with Racerguy. It sounds like the rear gear is going south. My father-in-law has a '96 that started roaring last month. The bearing all looked good. but the gears were ate up. Changed the gear set and all the bearings.