97 F150 Stubborn Vibration
12-27-2013, 08:37 AM
#11
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Thanks Jbrew. This sounds simple enough. I see the mounts on rockauto for $13. What is involved with changing it? Do I need to pull the transmission?
Also cleaning the slip yoke and lubing is simple enough, since I'm going to be down there any way I can do both. When I had the drive shaft out for the u-joints I did wipe off the outside, but I didn't clean inside or apply any lube. What kind of grease is used in this application? Just the same stuff I used on my wheel bearings?
01-05-2014, 05:43 PM
#12
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Thanks Udder, I'll give it a shot. Both shops told me the tires balanced fine and they look like they're still in good shape, but I know tires may still balance fine even with lumps/divots in the tread surface.
How fast would I need to get the tires spinning before I notice any problems? I don't feel the vibration below 60mph, and I wouldn't feel very comfortable running the truck that fast with the rear end off the ground.
This is interesting. I've been wondering if maybe the problem is in the differential. I drive my truck 30 miles one way (all interstate) to work. So I'm running between 65-75 the whole way, non-stop. I've noticed that when the truck is still cold in the mornings the vibration isn't nearly as bad. But after about 5-10 miles on the interstate and the truck warms up the vibration seems to get worse. I've also noticed it gets worse going up hills and slightly better going down hills. Not sure if that is related.
Do you notice the vibration gets better or worse under certain conditions?
How fast would I need to get the tires spinning before I notice any problems? I don't feel the vibration below 60mph, and I wouldn't feel very comfortable running the truck that fast with the rear end off the ground.
This is interesting. I've been wondering if maybe the problem is in the differential. I drive my truck 30 miles one way (all interstate) to work. So I'm running between 65-75 the whole way, non-stop. I've noticed that when the truck is still cold in the mornings the vibration isn't nearly as bad. But after about 5-10 miles on the interstate and the truck warms up the vibration seems to get worse. I've also noticed it gets worse going up hills and slightly better going down hills. Not sure if that is related.Do you notice the vibration gets better or worse under certain conditions?
Just let wheels rotate with engine at idle, tranny in D. Watch wheels from rear and side. Look for lateral runout in tire and tire hop.
01-05-2014, 10:34 PM
#13
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Thanks Jbrew. This sounds simple enough. I see the mounts on rockauto for $13. What is involved with changing it? Do I need to pull the transmission?
Also cleaning the slip yoke and lubing is simple enough, since I'm going to be down there any way I can do both. When I had the drive shaft out for the u-joints I did wipe off the outside, but I didn't clean inside or apply any lube. What kind of grease is used in this application? Just the same stuff I used on my wheel bearings?
Yea that little $13 mount can do allot of damage when neglected. It's hell on the drive-train.
01-05-2014, 10:37 PM
#14
Senior Member
Just be careful on the roads. These trucks rides so smooth with a new mount, - before you know it your doin 80 lol.
07-07-2015, 07:15 PM
#15
Thanks Jbrew. This sounds simple enough. I see the mounts on rockauto for $13. What is involved with changing it? Do I need to pull the transmission?
Also cleaning the slip yoke and lubing is simple enough, since I'm going to be down there any way I can do both. When I had the drive shaft out for the u-joints I did wipe off the outside, but I didn't clean inside or apply any lube. What kind of grease is used in this application? Just the same stuff I used on my wheel bearings?
Did this fix your issue? I'm still chasing this shake. It obviously wasn't the clutch packs in the limited slip rear. I had a shop put the detroit truetrac and the shake still persists. On a lighter note my truck got through 8 inches of snow this winter
. Anyway, the U-joints were been replaced 20k miles ago, it got new michellin LTs around the same time. It currently has 83k miles on it and had 40k on it when I got it in 2010. The tires have been rotated and balanced at regular intervals and all have regular wear. The truck also gets 16mpg highway (calculated at the pump miles driven/gallons purchased). I'm at a loss to what's causing this shake and thinking of changing this mount next, I just don't want to throw parts at it.
The shake happens 60-75mph and is constant during acceleration but increases from 75-65 when the gas pedal is released. It then stays constant at 65-60 and is non-existant under 60mph. The shake is also not felt in the steering wheel so I don't think it's front end components. I'm totally at a loss here.
07-08-2015, 08:54 AM
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Kind of. Now that its warm I'm not having any vibration issues with the truck. I've replaced so many things I'm not sure which ones helped. I think since my last reply I've also replaced all the rims and tires. I had a set of aluminum rims where the studs had oval shaped a few of the bolt holes so I just went to the scrap yard and pulled a set of steel rims and threw those on with new tires.
My truck seems to really not like the cold weather. When its cold I get all sorts of trouble out of it. The road speed vibrations come back. Sounds like the power steering pump is going bad. The heat doesn't work... lots of problems when its cold. But in the summer she runs like a top.
My truck seems to really not like the cold weather. When its cold I get all sorts of trouble out of it. The road speed vibrations come back. Sounds like the power steering pump is going bad. The heat doesn't work... lots of problems when its cold. But in the summer she runs like a top.