Ford F-150 - 1997-2003 :: Vibration / Truck Is Bouncing Most Of The Time At 37 MPH
Feb 25, 2016
I have a 4.6 01 F150 with 3.08 rear end I got back in Sept. In Nov. I replaced the timing chain/guides and brakes/rotors all the way around. I have also flushed the cooling sys. and replaced all the coil packs/plugs in Nov. About 2 months ago I started feeling a vibration(feels like the truck is bouncing most of the time not bad but I know something isnt right) at ~37MPH. Not always bad but 98% of the time you can feel it.
I feel it at other speeds sometimes also. 2% of the time I dont feel anything. It had older tires and I got a new set ~ 3 weeks ago and its the same. A couple days ago I put a GoPro under it and filmed the driveshaft and it does seem to be bent some. What might be my issue or things I can check myself? One other note is the previous owner did use the truck to haul a horse trailer some and I know now that rear end was not the best for that! Truck has 210K on it and engine was replaced at ~ 150K
2001 F150 Driveshaft wobble - YouTube
I went down the street and back and only got up to ~35MPH
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My truck won't down shift most of the time if I'm in 4wd especially I have to manually shift or stop let the rpms go to idle then it shifts down and I can take my foot off the brake and drive again not good when ur in deep mud and u start slowing down and can't bring rpms up...
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I have a 2001 Ford F150 with 165800 miles. I just had my power steering pump, PVC valve, and serpentine belt replaced by tire kingdom this Sunday 3/2/14.
After they replaced those parts, and I picked up the truck. I noticed the truck was making some new noises, these noises occur when I brake an it sounds like a small vibration on my dashboard and there is a noise underneath the truck. the sound also get louder when I roll up and down the window and run the ac. This had never happened before the repairs.
I took it back on Thursday 3/6/14 back to the mechanic and told them about the new problems. Now they said I had a brake problem. So they replaced the calipers, brake pads and rotors. But I still have the weird noise.
The truck still needs two rear tires a new high-end ac line and a freeze plug. Would any of these cause the noise underneath the truck or the noise in the dashboard or is there something else?
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I have a 2003 Ford F150 with a 5.4V8 Triton 4X4. The truck is about to roll over 200K here soon. I am feeling/hearing a vibration/grinding sound coming from the truck when I am moving slowly and making turns, either left or right turns. Seems to happen more so on left hand turns. I have changed all power train fluids and filter, and still does it. I do not feel or notice the vibration/grinding when I am going straight or at highway speeds. It is only when I am moving from a stop and making turns. How to diagnose, find out, repair, fix this issue?
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2002 e350 7.3 diesel transmission... At 7 miles the speedo began bouncing and truck drops into second. Parked it 30 minutes, stated up no problem until 8 miles and the it started again. Have checked most of the electrical, changed speed sensor and transmission position sensor. Only error code 2-3 rd gear mismatch.
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My truck is a 1998 F-150 4X4 set up for towing etc. The left front started smoking and the front end just started bouncing around very badly. Of course I pulled off and let it cool down. My question is this; I've pulled the hub and the bearings seem smooth although maybe a bit tight. I've checked the caliper and it seems to be working properly.
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I have a 2003 F150 4x4 5.4 ex cab. The last few months, the back of my truck has been bouncing bad. Speed doesn't matter, every bump will make the back end bounce like crazy, heck even dropping or closing the tail gate will make it bounce. I've replaced the shocks at all 4 corners, rear shocks have been replaced with 3 different sets trying to rule out bad shocks out of the box, new leaf springs and shackles and hangers look good. I've checked the cab mounts, checked for cracks in the frame or anything loose. It has me stumped.
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I have a 2000 f150 5.4 liter engine. I traveled about a month ago and while on the highway it started "bouncing/shuttering" really bad. I pulled off and while still in drive but completely stopped it was still bouncing but when in park it stopped. I took in into the Ford dealership and they said that cylinder 5 was misfiring and it was losing pressure fast. Then it stopped acting up completely and they couldn't find anything wrong with it.
Well about a week ago it started bouncing again on city roads (no highway). The check engine light came on and Orielys said it was a cylinder 5 misfire. Also, under the oil cap and in the tube where you would put the oil in has a yellow thick substance on it. I know that it is water in the oil. Also, there is a black "gunk" not far from where you would put the oil in. Could these problems be connected?
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I replaced the clutch, slave, flywheel and pilot bearing. Now it sounds like gravel bouncing around under the truck.
Everything works beautifully, but there is horrible noise especially at idle. If push the clutch it will quiet a little. If I change the rpm it will get worse then quiet out then get loud again, there is a sweet spot.
What the heck did I do wrong. It's a horrible gravelly grinding sound.
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I bought a 7.3 f250 with 300k mi. It had a battery light on but didn't show any signs of trouble. Eventually started dropping volts a few days later and I replaced the alternator. The light is still on and flickers in time with the idle of the truck and sometimes goes out when I'm on the gas pedal. Some nights when the lights are on the voltage drops ever so slowly until its drained. Why the new alternator didn't fix the problem? NAPA's scanner says the truck has 12.4V at idle and 12.1V at idle with the lights on. Batteries are relatively new and test fine, dual Interstate Mega-tron Plus batteries-top of the line.
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Last summer my A/C and blower stopped working while I was driving on a hot day in July. After replacing blower resistor, the fan works but still no A/C. I tried recharging refrigerant but the pressure in the lines was too high. Also it didn't seem A/C compressor was working either. I suffered through the hot summer only to find when winter came the Heat quit working as well. I noticed antifreeze smell in cabin and put liquid aluminum to stop the leak and still no heat. I planned on pulling the dash and replacing the heater core but wondered while the dash is off could there be something to replace in here on the A/C as well?
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Symptom: A vibration that feels somewhat like a bouncing tire
Cause: Coasting in Drive (Applying the gas at all stops the vibration, putting the car in Neutral also stops the vibration)
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Quick question. If you unplug the vacuum lines from the solenoids will it enable the 4x4? Is there a way to enable the 4x4 full time?
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I know it will wear out the tires but will it hurt the front end? Also the drive shafts to the front end is not turning.
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My 2002 Ford F-150 4x4 4.6L 5speed strangely has a time delay in starting now. A delay in TIME and not the usually chucking along waiting to start. Or simply I turn the key and a second or two passes before anything starts to happen and it fires right up. Was wondering a few months ago, if my clutch sensor was going out but then it cleared up once I put a new battery in it although at the same time the weather warmed also. Bad connection somewhere, bad ignition switch, or bad clutch position sensor – I could go in each of these directions. Thought maybe the security in the key was doing it too but both keys have the same problem. No codes also.
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I have a '97 F150 4x4 with the 5.4L engine and automatic transmission. The tranny's been slipping on and off for a couple of years. It started when it was hot outside, I had been driving a long ways, and I was trompin' on the gas to pass someone. Still, the slips were rare. As it got worse during the hot summer months, I just minimized my long-distance travels.
I recently took it to a transmission mechanic. Like some of the feedback to posts in here, he felt it was a problem with the engine - because we had a bad EGR valve signal on the computer. (We still flushed the fluid. I later replaced the EGR and the DPFE. Another mechanic went through everything, replaced some valves that had something to do with the EGR, and feels the engine is 100% (and it runs very, very smooth). For those that will bring it up - I have replaced all of the coils (though it's been a few years). Having actually replaced some numerous times over the years, I can feel when one is bad (of course, the 'check engine' light as well). Lastly, we've replaced all bulbs in the dash so they are all working as well. Also, the transmission is not leaking. The computer system is giving us no errors/throwing codes.
After a couple of weeks, I happened to drive the truck a long distance one day and it started slipping. It got bad enough that it was slipping every time going from first to second gear. It would usually engage as I took my foot off the gas. Since then, because I haven't driven long distances, I have not had a problem.
The transmission mechanic thinks it's still an engine issue. He also mentioned a mechanical/electrical switch system on the side of the transmission (?). Give me a list of things to look at.
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2000 f150 4x4 5.4auto tranny.
When I turn the key, sometimes i have a time delay before the starter kicks in. I replaced the relay on the firewall and no change. A couple of days ago I started the truck but the starter did not turn off when the key was released. I had to turn the key to off then back to run to get the starter to stop. Now today, I nearly got stranded by it. It took several attempts to get the starter to kick in.
To me this seems like a relay sticking. What should I try next?
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My E-brake light stays on all of the time. I have cleaned the sensor and adjusted the pads on the drum. Any reason why the light stays on? Its driving me crazy.
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looking for any tech writeups or any good info on changing out timing chains on a '99 1/2ton with 5.4. I mostly am concerned about keeping it in time during the process.
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I have a 2002 f-150 4.6 that sometimes has a miss upon acceleration but not all the time.the truck is a 4.6 with a manual trans.has no engine codes and scanner never show a misfires but sometimes it does , have replaced all spark plugs and coil boots twice.
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'97 Taurus GL Wagon 197k: Some of this stuff has been going on for some time now (several months ... maybe even a year).
1.) Driving Itself:
Car seems to drive itself on my way home from work which is a long, flat road in the 45-55 mph speed range. Once I get into this range, I can take my foot off the gas pedal and the car pretty much maintains speed until I get to an upgrade. I've even noticed times when I'm not pressing the pedal but the car is slightly speeding up to the point where I have to keep tapping the brake to keep from getting too close to the car in front of me.
2.) Stalling/High Idle:
Sometimes when I come to a less than smooth stop at a light - say, a yellow light that quickly turns red and I have to stop quicker than I'd want, the car will stall out. This has only happened a couple of times in the last 6 months, but it had never done this at all up to this point, so it's a new phenomena. Otherwise, the idle is usually at 600 rpm (except recently I've been seeing high idles of 2000 rpm every so often, which is really weird!!). Also, it seems like if I park the car on an incline, the engine will turn over many more times trying to "catch" and start - and the whole start-up sequence just feels weak - like it's not getting enough gas.
3.) Tach Bouncing:
This one's got me the most concerned because I think it's the most serious (and potentially the most costly to fix). I completely transfused the tranny fluid a few months ago as a possible solution, by the way, so the fluid (Dexron Mercon IV) is fresh. At about 1500 rpm on the tach, the tach sometimes starts bouncing up and down on the scale and I can feel a metallic engagement/disengagement cycle. If I get above or below this area on the tach, however, no problem. Also, taking off from a standstill -even though I accelerate very slowly and smoothly because I KNOW the tranny is "soft" and will 'slip and slap' if I don't - I'm recently starting to feel a very very brief grinding-like slippage feeling that does not hinder acceleration much at all, but feels very unsettling. This is a new feeling and it only happens every now and then (so far).
You're gonna say the tranny's on its way out, right?
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