4.6L V8 Technical DiscussionsAny questions about engine, transmission, or gearing can be asked here!
Welcome to Mustang Forums!
Welcome to Mustang Forums.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
2007 Roush Mustang. I bought it used for a great deal. Can't really go wrong finding a Roush right? From the get go it has had a vibration over 70 mph after I let off the accelerator. It goes away when I give a little gas, but gets way worse whenever I'm anywhere over that speed, and feels like it's going to shake apart if I hit 130. I've installed a Steeda adjustable upper control arm, and that didn't change anything. The drive shaft is a Roush Performance steel 4" drive shaft, and the rear end has 4.10 gears that seem to get louder the faster I go. I have noticed tons of posts in regards to the S197s having this problem. Any suggestions? What about an aluminum drive shaft vs. the steel I have?
This ad is not displayed to registered or logged-in members. Register your free account today and become a member on Mustang Forums!
Not yet, but I'm compiling a list of the lower end things that I can do before forking out almost $1G for this issue. That and having the drive shaft balanced. Previous owner put 4.10 gears and a line lock system in it...so I know it's been run hard. Took out the line lock.
Ok, so I get why you guys might think it would be the tires, but it just seems really strange that it really only vibrates as I let off the accelerator. I would think if it was a bad tire, it would get worse the faster I got no matter what I was doing. I definitely will have the tires looked at though, and thank you. Still wondering what the overall opinion is on the steel vs. aluminum solid one piece drive shafts.
It's in the butt, and all through out the bottom of the chassis...I can literally feel it through the whole car. The drive shaft that is there now, is a Roush steel 4" solid shaft, and I'm hoping it's just out of balance. The guy at the driveline shop is trying to sell me a whole new rear end AND drive shaft...so I'm just getting some opinions. These S197s are new to me, but I'm die hard and want this one to be my baby.
so the steering wheel is solid? I'd rotate the tires first. If the butt doesn't feel it anymore but the suddenly the wheel wants to jump out of your hands then you have a bent rim or really messed up tire. Do that before you go any further.
08 S197 GT Auto: FRPP Strut Tower Brace, FRPP Bullitt CAI, Bama 91-P Tune, VBX remaned valve body with Superior Transmission Shift Kit.
Pending upgrades: Shaftmasters Aluminum 3.5" DS, FRPP 3.73 gears, Axle back exahust (?)
Originally Posted by LostBoyz
if you are getting 29mpg in your 5.0, you aren't driving it correctly
Thank you. I will update as I go along. Also, if I need to get a new DS at some point, Shaftmasters is just 6 miles from where the Ford plant it located. I have heard nothing but good things about their aluminum shafts, and for the cost they say you can't beat it.
This forum is owned and operated by Internet Brands, Inc., a Delaware
corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford
Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor