Drive train vibration from 40 - 70 mph
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Joined: Dec 2000
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Drive train vibration from 40 - 70 mph
I have a 95 F-150, 5.8, E40D, SuperCab long box 4x4. Between 40 - 70 mph I get a very low frequency noise, that pulsates and is very hard on the ears. It also produces a vibration that can be felt in the cab, especially when letting it coast to a stop.
I have just changed the front auto hubs to manual, since it felt like they were staying locked. Repacked front wheel bearings. Previous owner had the front end aligned twice recently. I have switched the newer tires with my 89 F-150's Wranglers, then switched back, and nothing has helped.
The truck always makes the noise between 40 - 70. Even coasting in neutral and with the engine off at that speed. I'm fresh out of ideas. It appears to be somewhere between the tranny and rear end diff.
Could it be a bad drive shaft? The U-joints look ok. I don't know about the slip yoke or the bearings on the transfer case output shaft. I'm fresh out of ideas. I searched this site and several people mention a pinion angle. And several others have had the problem and are still looking for the answer.
Everything is stock on the truck. It started doing this about 6,000 miles ago, before I purchased the truck from family. Any help is greatly appreciated.
Joey
I have just changed the front auto hubs to manual, since it felt like they were staying locked. Repacked front wheel bearings. Previous owner had the front end aligned twice recently. I have switched the newer tires with my 89 F-150's Wranglers, then switched back, and nothing has helped.
The truck always makes the noise between 40 - 70. Even coasting in neutral and with the engine off at that speed. I'm fresh out of ideas. It appears to be somewhere between the tranny and rear end diff.
Could it be a bad drive shaft? The U-joints look ok. I don't know about the slip yoke or the bearings on the transfer case output shaft. I'm fresh out of ideas. I searched this site and several people mention a pinion angle. And several others have had the problem and are still looking for the answer.
Everything is stock on the truck. It started doing this about 6,000 miles ago, before I purchased the truck from family. Any help is greatly appreciated.
Joey
Postmaster
Joined: Jul 1999
Posts: 3,172
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Drive train vibration from 40 - 70 mph
U joints can look fine , you really have to remove the driveshaft & check its movement on both axis , Im betting you ll find one or more of the cup needle bearings have turned to dust . Good news is they arent expensive or hard to replace . Its always a good idea to get U joints that can be lubricated .
Senior User
Joined: Oct 2000
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Drive train vibration from 40 - 70 mph
Had the same thing happen on my 95, with same symptoms. Except that when the driveshaft was off, the mech noticed that the yoke was damaged as well. Had to get a new yoke put on, and balanced. Truck feels great now!
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Joined: Jun 1999
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Drive train vibration from 40 - 70 mph
Be careful not to damage the tubing of the driveshaft when you change your u-joints....even the smallest dent from a vise or hammer will cause a vibration that requires changing the tube to correct.
Phil
Phil
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Joined: Nov 2000
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Drive train vibration from 40 - 70 mph
Hi had a similar problem on my 86 s.c. long box turned out to be a carrier bearing right by the slip joint. run the truck for a couple of miles then crawl under and see if the carrier bearing is warm if it is it is bad. John
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