So when I am coasting along at about 40 or higher if I tap (on off) the gas I feel like the motor or trans (Can't tell so don't ask unless you have a way for me to tell) kind of bounces. I also hear a slight clunk like as if the motor is raising off of metal then settling back onto it with no buffer. It is hard to describe. maybe I am just crazy
Possible Motor Mount Issue
- Location
- Denver Adjacent
Definitely sounds like a motor mount to me.....crawl under there and have someone rev the engine and watch the engine.
- Location
- Denver Adjacent
from and idle if you rev the engine, you should see a little bit of motion on the motor. If it jumps more than about an inch....you've got a problem. The reason I say crawl under is because it'll be easier to see if you are looking directly at the motor mounts.
NMTerras
Suspension Lift
- Location
- New Mexico
You can probably see the motor mount through your driver's side wheel well (that side is the one that usually fails).
^^^that's a broken one. Yours might be seated and not as easy to see but if some else sits in it and hits the gas and you watch here you should be able to tell
^^^that's a broken one. Yours might be seated and not as easy to see but if some else sits in it and hits the gas and you watch here you should be able to tell
- Location
- Denver Adjacent
pretty much directly below the exhaust manifold on each side.
- Location
- Denver Adjacent
Its kind of hard to tell if they are bad unless yours is separated like the picture above. Thats why I suggested watching it move on the fly with the engine running. You'll see two metal plates w/ a rubber pad in the middle. If the top or bottom metal plate separates completely from the metal on either side, thats a broken mount.
Worst case, the rubber could be completely gone....which would cause the fan to hit the shroud in the front...and lots of other problems.
Worst case, the rubber could be completely gone....which would cause the fan to hit the shroud in the front...and lots of other problems.
- Location
- Smyrna, TN
Driver side looking up into the fender.
NMTerras
Suspension Lift
- Location
- New Mexico
Yeah thats it. Wheel well liner long gone.
Sent from my brain using technology
Sent from my brain using technology
- Location
- Rochester, NY
totally not trying to threadjack, but after reading this I went out and checked my driver side one and found this...it seems like it's just some kind of flimsy metal that is all rotted looking, but it certainly doesn't look good.
- Location
- Rochester, NY
that's what I was thinking...Cameron23 you can rev the truck up from the engine if nobody else is there to do it. just push the little lever on the throttle body. here is a pic of what I mean 
it's the cable on the left that controls the throttle. I just did it and had a bit of movement from the engine.
it's the cable on the left that controls the throttle. I just did it and had a bit of movement from the engine.
- Location
- Rochester, NY
yea I understand that, I was sayingn you could look from the top at least and see if there is any clear movement in the engine; more than there should be at least.
True maybe tomorrow honestly it almost feels like its not shifting up enough when it's coasting like it responds way to fast to me pushing the pedal but not always usually coasting downhill but the rpms don't seem to high. I do here a slight clunk though so ill check it out
Sent from the future using future stuff and such
- Location
- machesney park IL
Reving won't do much if it isn't in gear, The transmission loads the mounts with driveline torque. Yellowx16 yours looks fine its just the heat shield that is rusted. If its out you'll know.
- Location
- machesney park IL
Cameron23 I would guess your issue to be bad U joints rather then a torn mount. Though it is possible your mount is torn usually they fail when people aggressively off road. It otherwise is a rare occurrence especially among those who street their rigs. I feel that since the new upgrade motor mounts have came out it brought a lot of attention to problem that very rarely occurs. When a motor mount is out well its out and your engine is completely loose the fan buzzes the shroud.
With that said it wouldn't hurt to see how much it moves around. I would set the parking brake maybe even block the wheels and have someone hold the brake go from park to drive while you look under hood. Will the engine move? Yes it will. Its up to you what you consider a abnormal amount of play.
The U-joints would make more sense to me. As if the U-joint needle bearings are shot the driveshaft could clunk when letting off or applying the throttle. You may experience vibration at a certain speed or noise.
With that said it wouldn't hurt to see how much it moves around. I would set the parking brake maybe even block the wheels and have someone hold the brake go from park to drive while you look under hood. Will the engine move? Yes it will. Its up to you what you consider a abnormal amount of play.
The U-joints would make more sense to me. As if the U-joint needle bearings are shot the driveshaft could clunk when letting off or applying the throttle. You may experience vibration at a certain speed or noise.
I do have some vibration at highway speeds how do I check the joints.
Sent from the future using future stuff and such
- Location
- machesney park IL
[video=youtube;OVC76dSBNnY]https://www.youtube.com/watch?v=OVC76dSBNnY[/video]
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NMTerras
Suspension Lift
- Location
- New Mexico
That motor mount looks broken to me, or at least partially torn, which is why it might not have popped up like mine yet. perhaps you have u-joint issues as well, but the vibration under load could well be the motor mount. Not sure I agree with Ben that the motor mount tear is an all or nothing proposition, especially if your offroad use is limited to forest roads, fishing, etc.
- Location
- Columbus OH
It could be both, you can do the u-joints in about an hour, for about $30.00 so I would start there. Heck I keep two sets in the little pocket on the back of the passenger seat just to have them close by.Without seeing the mount in action it is really had to tell.
An old school way of keeping the mount from tearing in the first place was to weld a short section of chain on the mount as a limit strap.
very low tech compaired to new rigid mounts, but they still worked well, and still had the dampening qualities of the factory mounts.
An old school way of keeping the mount from tearing in the first place was to weld a short section of chain on the mount as a limit strap.
very low tech compaired to new rigid mounts, but they still worked well, and still had the dampening qualities of the factory mounts.
NMTerras
Suspension Lift
- Location
- New Mexico
but the one on the other side of the engine rarely fails (passenger side)
- Location
- machesney park IL
I would block the wheels and put it in neutral. Then turn the driveahaft back then forth by hand *clunk *clunk to check for play in the joints. If in park you'll never be able to check do to the shaft being under load.
Ben
Ben