I modified the stock transmission mount for my '13 GT, but have yet to try it out. I am currently running a Whiteline bushing insert. The thing that is holding me back from trying out the modified mount is, it would require me to unbolt the x-pipe from the header collectors and/or remove my o2 sensors to access the transmission crossmember bolts...too much of a hassle IMO, so I may end up selling it...preferably to someone locally. Here are a few pics.

 

Rear shot.

 

Stock mount before modification.

 

Stock mount with rubber removed.

 

Stock mount in jig before medium grade polyurethane bushing was poured.

 

I like that!
Would be a nice option for me right now since my motor and tranny are out of the car.

What did you re pour in there? Where did you get it?

 

Thanks. Here is a link to the place that I ordered the polyurethane kit from. I used the 80A which is medium hardness.

http://www.energysuspensionparts.com...sp?prod=DIYMMI

 

Thanks! I just ordered some of the 80A stuff

 

Cool! Good luck and please post pics of your modified mount in this thread when you're done.

 

Have you tested yours out yet?
I don't know if I should just leave the existing rubber and pour it in the 3 voids or do what you did and replace the entire thing

 

I haven't tested mine yet, as I am currently running the Whiteline insert. IMO, I think you would be fine just pouring it into the voids. It would give you the same result as the Whiteline insert. However, for best results I recommend removing the rubber and pouring the entire bushing.

 

One more question before I get started. Did you spray something on the plate it is sitting on so that it released easily?

 

Yes, I used carnauba wax as a releasing agent.

 

awesome mod, really interested in what the results are

 

While I won't have my car back together and on the road until next spring, I can tell you I think it will make a huge difference.
With the transmission out and the cross brace attached to it, it would wobble and flex all over the place with no effort.
Now with the liquid urethane poured into the 3 voids, the cross brace feels very strong and stable.
I was surprised to see how soft the stock setup was.

 

Tron84, will you please post a pic of your modified mount?

 

Here ya go:

 

Now you're cooking with Crisco Tron84! How soon do you think it will be before your car is up and running to test it out?

 

Won't be able to test until the spring thaw, car will be done before then through..... I hope

 

What other mods are you performing while the car is down?