Coyote 5.0 Vibration

[ShelbyGT350]

This week I was in Orlando, FL on business. When I booked the rental car, I got a "Full Size" car. When I went to pick up the car at Budget, I asked them casually if they had any hardtop Ford Mustangs. He said he would check. 30 seconds later he says, "We just had one come back I think you're going to like - it's a hot rod out of our exotic collection," and I responded, "A 5.0 GT?" and he nodded his head yes. I said, "How much are you going to stick me for that?" He said, you're a repeat customer, we can do it for an extra $15 a day (my booked rental was $25 a day). I said "ABSOLUTELY." This is the first time I've been able to drive at GT for an extended period of time like that (4 days). i'm planning to buy a 2018 GT or GT350. After a lot of freeway cruising at 70MPH, i noticed there's a good deal of vibration out of the motor (I drove the 2.3T earlier this summer for a week and didn't have that issue). Is that normal with the Coyote motor (with the two large heads and 4 cams)? When I drove a GT350R earlier this year at Buttonwillow Raceway, didn't really notice it that much. Curious as to all of your thoughts. Thanks!

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[l'Ingegnere]

Whatever you were feeling, it wasn't the engine. I've only ever noticed vibration from a Coyote at idle.

 

[jasonstang]

The vibration is not from the engine but probably from abused tires. People drive the crap out of rental cars. I wouldn't be surprised someone has done handbrake turns or burnouts on that car so the tires are not evenly worn.
The Coyote is pretty smooth for a V8.

 

[keiths2kgt]

http://www.mustang6g.com/forums/showthread.php?t=15990

 

[Chad11491]

Not usual. I've had mine for well over a year with suspension and bracing mods and still no vibration. That sounds like unbalanced tires or a bad alignment. When I had a really bad balance from Kauffman I had vibration at 80 that shook the whole car. They blamed my wheels so I took it to Discount Tire and they fixed it right up with an actual balance. I'm betting that's the issue here.

 

[aham23]

You can't judge the car by driving a rental fleet one. Cause nothing parties like a rental.

 

[ShelbyGT350]

This week I was in Orlando, FL on business. When I booked the rental car, I got a "Full Size" car. When I went to pick up the car at Budget, I asked them casually if they had any hardtop Ford Mustangs. He said he would check. 30 seconds later he says, "We just had one come back I think you're going to like - it's a hot rod out of our exotic collection," and I responded, "A 5.0 GT?" and he nodded his head yes. I said, "How much are you going to stick me for that?" He said, you're a repeat customer, we can do it for an extra $15 a day (my booked rental was $25 a day). I said "ABSOLUTELY." This is the first time I've been able to drive at GT for an extended period of time like that (4 days). i'm planning to buy a 2018 GT or GT350. After a lot of freeway cruising at 70MPH, i noticed there's a good deal of vibration out of the motor (I drove the 2.3T earlier this summer for a week and didn't have that issue). Is that normal with the Coyote motor (with the two large heads and 4 cams)? When I drove a GT350R earlier this year at Buttonwillow Raceway, didn't really notice it that much. Curious as to all of your thoughts. Thanks!

Thanks for your thoughts folks. BTW, it was a BLAST driving that car. Certainly neck-snapping acceleration! My partner almost lost his cup of coffee when I got onto the Interstate on-ramp.

 

[Cobra Jet]

Driveline vibe - documented by the few thousand responses in that thread that was linked.

 

[Jim Bronson]

I haven't noticed any vibration as described in the linked thread. I do have a little bit of whining/hissing noise that comes and goes as I go up through the gears and stops if I grab the shifter stalk at the base. It isn't a big deal, but I will mention it at the first service. I'm just shy of 900mi.

Update:
I drove about 75 miles today up into the mountains. I tried to simulate the conditions under which others have the vibration problem, and mine is rock solid at all speeds to about 85. I just feel that awesome Coyote growl. That leaves me to conclude three possibilities:

1) The vibration hasn't started yet.
2) Ford fixed the problem.
3) I got lucky.

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