I agree Red. Absolutely no need for a driver side mount. I think you would get rid of any comfort quite frankly if you replace that one. I feel like you will undo what you wanted to do in the first place. The TTR motor mount coupled with aftermarket firmer lower bushings or the TTR lower mount and it will be great. If there is no movement and no NVH then why change the driver side one? That one looks like a PITA to change anyway. No thanks... lol...
Br,
-Mike
What do you mean by "undo what you wanted to do in the first place"? I think it depends on what you are looking for. Usually, when you do motor mounts you are going to sacrifice comfort for performance. Usually, people, won't do motor mounts for fear of sacrificing comfort. The car feels too much like a "race car". Now obviously with softer bushings, one would be able to find a balance between performance and comfort.
I asked TTR the question because I see on their site that they have developed left and right motor mounts for other platforms in the past. Also, I am more familiar with replacing all motor mounts in one go. I am not saying it's wrong or right etc etc. I think that's another discussion but that is what I am familiar with.
Furthermore, there is the argument out there that changing the stiffness of the other two mounts and not the third will alter the way the transaxle mount experiences vibration possibly leading to it failing prematurely. Of course, the other side of the argument is that decreasing powertrain movement will actually preserve the OEM transaxle rubber mount as it doesn't experience the same magnitude of deflection etc. I am more of the belief that it will actually help to preserve the OEM mount. However, some folks won't do one at a time. It's either do all the mounts at once or leave them alone and keep them stock.
One can see here from their site they are advertising both left and right upper motor mounts for the Ford Fiesta ST platform. So I was simply curious as to why they had not done the other motor mount for our vehicle yet. I wanted to know if they had evidence that the transaxle motor mount was robust enough to match up with the other 2 stiffer mounts.
To piggyback a bit on what
@Alfresco said:
To clarify, the driver's mount is one piece but is not solid--the center bolt is suspended in the mount in webbed rubber. In high power cars with sticky tires, that may cause some wheelhop. That said, I think an insert would probably be a more cost effective solution than an entire replacement mount. Or you could go old school and fill the voids with 3M Window-Weld.
Down the line, after adding more power to the car the transaxle OEM mount could become a weak point based on the fact that it is less stiff than the other two mounts. I believe you guys and I am sure that you guys are not feeling any motor movement. However, replacing the transaxle mount could only make the powertrain
even more secure. I wouldn't dismiss it completely depending on what you are looking for out of your vehicle. I know
@TurboTechRacing has considered the idea of developing one so I don't believe the idea is too far fetched.
Also, I am not too sure how difficult it would be to install the transaxle motor mount as long as you can prop up the motor properly. If you are referring to having to remove the intake, battery, ECU, battery tray and move some cables out of the way its a breeze. I can literally take it all out and put it back in 20 min flat. If there is an extra extremely cumbersome step someone please inform me.
Anywho, I ordered my mount yesterday in Yellow (wanted to be different). Can't wait for it to come and it's already in the mail! Doing the RMM was already a drastic improvement so I'm looking forward to this mod.
