Noisy Problem
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Junior User
Joined: May 2005
Posts: 80
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From: New Orleans, Louisiana
Noisy Problem
OK heres the deal, I'm not sure if it is transmission or brakes. When riding at and above 30 mph. I get a roaring sound. I know its from the engine. Its almost as ifit is a bearing roar. I just replaced the hanger bearing today so i doubt that it is the problem. Could it be transmission gear roar? Have not check fluid level in trans yet (3 spd. manual). Brake work was done less than 2 yrs ago (new drums, cylinders, shoes) when riding it sounds like it is coming from the center of the truck. I have a '54 F100 same general brake set up and no roaring sound. Im not use to all drum brakes, changed my '66 over to disc fronts. Does anyone have any suggestions on where to start or is this common in such a old vehicle. the truck is a 1964 F100 223ci 3 spd. manual. any help wold be greatly appreciated before i start to drive t 80 miles a day. Thanks for all the information you can give and Merry Christmas
Elder User
Joined: May 2005
Posts: 581
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From: Montana
also check the fan. if it has been upgraded to a newer model with the clutch fan sometimes the bearing will go out on them and they will roar at higher RPMs. if it has a fan clutch you should be able to turn it with your hand with engine off. if it's a direct fanbelt hookup ingore this post. next check to see if there is a carrier bearing in the drive line. might be froze up. hard to tell as to what kind of roar you're hearing. just a coupla things to look at. maybe a bent drive line causing the carrier bearing to vibrate. at higher speeds it will stop vibrating and kinda roar. Dutch
Logistics Pro
Joined: Jun 2003
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Axle bearing or wheel bearing. Pull the rear drums off and pull the four axle bearing retainer nuts off, then put the drum back on backwards, with 3 lug nuts on a couple of turns each and use the drum as a slidehammer to persuade the axle out and then spin-test the bearings...
If not there, then proceed to the front wheel bearings. If it was coming from a front bearing loud enough to be heard, you'd feel it in the wheel, that's why I suggested the rears first.
If not there, then proceed to the front wheel bearings. If it was coming from a front bearing loud enough to be heard, you'd feel it in the wheel, that's why I suggested the rears first.
Elder User
Joined: May 2005
Posts: 581
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From: Montana
I agree with Instig8r63. after thinking about it over night i also believe it's in the rear end.either wheel bearings or third member cluster. you can jack it up and try and wiggle the tires up and down, or sidways if you will, if there's any movement there other than forward or backward it's a very good indication that the bearings are on their last leg. if they seem solid then you will need to dig deeper by doing what Instig mentioned, dismantle and make sure . if thats okay then my bet would be on the third member bearings. may have been run out of oil at one time or just dying of old age. long time ago i had a falcon that i run out of oil and from that day on it howled and the faster i went the louder it got.lasted a year before it died completely. hope that helps. Dutch
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Junior User
Joined: May 2005
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From: New Orleans, Louisiana
Dutch,
Did you replace or rebuild the third member and how much did it cost? The ring and pinion need to be replaced as well as bearings? Just thinking that since the rear end is 40+ yrs old maybe it wouldnt be a bad idea to just rebuild it.
Did you replace or rebuild the third member and how much did it cost? The ring and pinion need to be replaced as well as bearings? Just thinking that since the rear end is 40+ yrs old maybe it wouldnt be a bad idea to just rebuild it.
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Laughing Gas
Joined: Oct 2007
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Hmm, I doubt its coming from the differential. What instig8r63 said sounded like a good first step...
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Is it worse when taking off in first gear? Not as bad when the truck is coasting out of gear? If so it could be the input shaft bearing in the tranny. I had one that sounds the same as you have and that was the problem.
Bill T.
Bill T.
Elder User
Joined: May 2005
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From: Montana
I replaced the whole cluster on the rear end. have done this procedure five times so far. different trucks. there are how to forums on this site that tell you exactly how and what to look for. very knowlagable people here.rebuilding can be extremely expensive, you can pick one up at a boneyard for a tenth of rebuild. there are a wide variety of autos and trucks where the parts are all interchangeable. maybe something to do would be to put it on jack stands and have a friend help you so you can lay under the truck and listen at least this may narrow it down to a specific area. . dutch
Senior User
Joined: Oct 2007
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See if you can grease your throwout bearing...I had a roar/vibration in mine, pulled the transmission for some dumb reason, and then put it back in. All I did is grease the t-o bearing, and the noise vibration didn't completely go away, but it definitely got a whole lot less severe. It was occuring at around 50-60 mph, and it was nearly unbearable. When I put it back together, it was just very slight at 70 or so.
ROb
ROb