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Do you know the part number for the latest new driveshaft? Wonder if it will fit my V-6 model.

Has anyone thought about changing the CV joint on the driveshaft. I packed some grease in mine and it cut the vibration but it came after 400 miles.

I had the new driveshaft installed and it reduced the vib about 90%. But it come back after about 1,500 miles but not to the extent it was.

Those poly diff mount may be to stiff for everyday drive. I experienced a lot of popping sounds with them.

If its not to late, I suggest you run away.

I do notice a vibration difference depending on the fuel tank levels. It appears less when the tank is half full than full. The rotation pulsing can still be felt at any level. I wonder if shielding the tanks or spraying them with a thick undercoating would help.

Besides loosening the 4 IRS sub frame bolts, does anyone know the correct procedure for aligning the IRS? Are special instruments or tools needed. The entire assembly is very heavy and not easy to manipulate.

Are there any drive line vibrations yet ?

If the vib decreases when you let up on gas peddle then chances are its coming from the driveline.

The vib comes from the DS/Diff joint. Try the two hose clamp balance at that joint on the driveshaft. It should reduce the vib, it did for me.

To install this on the stock driveshaft one end need to be disassembled, about a 3 hour labor charge with no guarantee it will work. So I never installed it.

I have a Balance Master Balancer for a V-6 for sale. PM me if your interested.

LOL

The Dealer replaced my differential and it reduced the vibration to a tolerable level. But now about 10,000 miles later it backed in full bloom. I'm thinking maybe something is wearing the carrier bearing or its a bad design.

Has anyone thought of trying the STEEDA IRS alignment bushing kit. Maybe these will align the IRS and driveshaft thereby correcting all the drive line angles.

The alignment bushing did nothing for me. You can do a quick check of the IRS alignment by checking if the IRS frame holes line up with the chassis holes, use a small dowel. These holes are located in the muffler area. There are also other measurements that can be done.

Go for a 2018 GT

Maybe if they fix the "Vibration Issue" they would sell more cars!!

As a owner owners of one of these defective vibrating mustangs I commend the enduring efforts put forth by everyone who is trying to fix this major problem. However, we should not have to be doing this and it's time for Ford to step in and fix their screw up for everyone with a real solution...