Vibration?

[scupking]

I noticed that my car has a vibration most noticeable at 40-50 and 70-80. It almost seems like something is lose. Also my car seems to drift all over the place. I had ford do an alignment and balance last month but I don't think its a balance issue. I just hope it isn't anything with my tranny. What do you guys think it could be?

 

[fobra559]

I noticed that my car has a vibration most noticeable at 40-50 and 70-80. It almost seems like something is lose. Also my car seems to drift all over the place. I had ford do an alignment and balance last month but I don't think its a balance issue. I just hope it isn't anything with my tranny. What do you guys think it could be?

Where is the vibration? If it's the steering wheel, it could be your front tire's air pressure.

 

[scupking]

Where is the vibration? If it's the steering wheel, it could be your front tire's air pressure.

I can definitely feel it in the steering wheel and also feel it through my foot on the gas pedal if that makes any sense? Ford did say they lowered my pressure to 30 psi. I had it at 35 before I brought it to them. I will check my tires tomorrow.

 

[scupking]

Ok, I updated the pressure to 35 psi and it seemed to help some but I can still feel it mostly thru the accelerator.

 

[isjoining]

i feel a vibration on the accelerator when the trans is in overdrive and im driving at around 40mph. Can't say I feel the same thing at 70-80.

 

[fobra559]

Ok, I updated the pressure to 35 psi and it seemed to help some but I can still feel it mostly thru the accelerator.

Check your driveshaft, that might be the problem.

 

[scupking]

Check your driveshaft, that might be the problem.

What would I check for? Just see if I can move it? I did have my rear end rebuilt and gears put in back in July. This is when the problem seemed to start. Then I got springs, shocks and struts put on last month and noticed the problem even more. Also my car seems to almost down shift into a gear that’s not there (this was happening before the tranny work). I will accelerate threw first without a problem I will be in second not pushing down on the gas any more then I am and the rpms will drop buy about 200-300 and this is with over drive off. If try to get on it right before this happens she just bogs down like crazy. Could something in my tranny be slipping? If my car is cold it won’t do this strange mid 2nd gear RPM drop but once she warms up it happens. If I floor it and stay on it this also won’t happen. It’s starting to annoy me. I can’t pin point what it could be.

 

[fobra559]

What would I check for? Just see if I can move it? I did have my rear end rebuilt and gears put in back in July. This is when the problem seemed to start. Then I got springs, shocks and struts put on last month and noticed the problem even more. Also my car seems to almost down shift into a gear that’s not there (this was happening before the tranny work). I will accelerate threw first without a problem I will be in second not pushing down on the gas any more then I am and the rpms will drop buy about 200-300 and this is with over drive off. If try to get on it right before this happens she just bogs down like crazy. Could something in my tranny be slipping? If my car is cold it won’t do this strange mid 2nd gear RPM drop but once she warms up it happens. If I floor it and stay on it this also won’t happen. It’s starting to annoy me. I can’t pin point what it could be.

You might need a aftermarket DS, I got the FMS from Summit. I got it after my gear install because my car was vibrating and was annoying the hell out of me. After I got the FMS DS my car runs smooth now. It revs smoother and seem to pick up slightly faster too. An aftermarket DS is usually recommended after gears.

 

[scupking]

You might need a aftermarket DS, I got the FMS from Summit. I got it after my gear install because my car was vibrating and was annoying the hell out of me. After I got the FMS DS my car runs smooth now. It revs smoother and seem to pick up slightly faster too. An aftermarket DS is usually recommended after gears.

I might sound stupid but what’s DS, FMS? My gears also whine like crazy. That might fix the vibration issue but I still need to fix this RPM drop thing.

 

[Digger]

DS=drive shaft
FMS=Ford MotorSports

 

[scupking]

DS=drive shaft
FMS=Ford MotorSports

Everything I see is for manual transmissions. I have an automatic.

 

[COramprat]

The u-joints might be wiped out. They are relatively inexpensive to replace.

 

[scupking]

Ok well I found a carbon fiber DS for autos made by PST (precision shaft technologies).

PST-1200S 1996-2004 2V Mustang "Street" Driveshaft-Auto $609.99

Carbon Fiber Driveshaft Specs.:
Lighter than steel or aluminum.
Three times the torsional strength of steel.
Torsional spring rate allows better tire hook-up.
Torsional spring rate allows smoother shifting.
Less shock load to the differential.
Eliminates or dampens high speed vibrations.
Reduces transmission and differential breakage.
Supplied with Steel Yokes.
Better 60 ft. times in drag racing applications.
ET's have been lowered in some cases by as much as .120.
In road racing smoother shifting and better durability of transmission and differential have been reported.
Tested on Cobra's at 180 MPH on Dyno with no vibrations.
A much greater safety factor, carbon fiber will return to a fiber and not create shrapnel under the car, as would aluminum or steel shafts.
"Street" Carbon Fiber Driveshafts are good to approximately 500-600 rear wheel horsepower and feature 1330 joints. They can be used with a factory style pinion flange.

 

[isjoining]

you can use the aluminum FMS driveshaft, you just need to use the yoke from the stock driveshaft

 

[scupking]

you can use the aluminum FMS driveshaft, you just need to use the yoke from the stock driveshaft

I figure if i'm giong to do it I should go all out with carbon fiber.

 

[fobra559]

DS=drive shaft
FMS=Ford MotorSports

Yup

you can use the aluminum FMS driveshaft, you just need to use the yoke from the stock driveshaft

And Yup

 

[fobra559]

Ok well I found a carbon fiber DS for autos made by PST (precision shaft technologies).

PST-1200S 1996-2004 2V Mustang "Street" Driveshaft-Auto $609.99

Carbon Fiber Driveshaft Specs.:
Lighter than steel or aluminum.
Three times the torsional strength of steel.
Torsional spring rate allows better tire hook-up.
Torsional spring rate allows smoother shifting.
Less shock load to the differential.
Eliminates or dampens high speed vibrations.
Reduces transmission and differential breakage.
Supplied with Steel Yokes.
Better 60 ft. times in drag racing applications.
ET's have been lowered in some cases by as much as .120.
In road racing smoother shifting and better durability of transmission and differential have been reported.
Tested on Cobra's at 180 MPH on Dyno with no vibrations.
A much greater safety factor, carbon fiber will return to a fiber and not create shrapnel under the car, as would aluminum or steel shafts.
"Street" Carbon Fiber Driveshafts are good to approximately 500-600 rear wheel horsepower and feature 1330 joints. They can be used with a factory style pinion flange.

The Ford Motorsport Driveshaft will do just fine But if you have the money then go ahead and get the Carbon Fiber DS, but I think it's not worth spending that much on a Driveshaft. My opinion, get the FMS DS and save your self $350 bucks

 

[fobra559]

I might sound stupid but what’s DS, FMS? My gears also whine like crazy. That might fix the vibration issue but I still need to fix this RPM drop thing.

As for the gear whine, that isn't good if it whines like crazy. It could do a lot of harm to your driveline. I would recommend to have a shop check that out.

 

[scupking]

Is this the one to get?
http://store.summitracing.com/partd...400070+4294907673+4294840044+115&autoview=sku

 

[lvmustanggt]

Is this the one to get?
http://store.summitracing.com/partd...400070+4294907673+4294840044+115&autoview=sku

I have question, when you get DS for summitracing do you just take stock out and bolt aluminum ds ? Is that it or have to mod some stuff ? I am thinking to get one for my 02 mustang gt. Is the install easy or take it to shop to make sure proper alignment ?