Filling Transmission Mount

[skurtov]

So a new TTR transmission mount is $120. A new stock transmission mount is $22. Has anyone attempted to fill the gaps inside the stock mount with urethane as in this thread?

>>>>http://www.sonicownersforum.com/forum/do-yourself-articles/7396-diy-poly-rear-lca-bushings.html.

I don't know what TTR uses as their urethane stiffness, but i was thinking that since most manufacturers use a relative stiffness on stock mounts of A40, you could use A60 and get a good balance between the softness of the stock mount and the stiffness of a filled mount.

 

[Dubbs_RS]

I am pretty sure that there is a thread on here where someone filled their subframe mounts with polyurethane. Should be the same concept here.

I am not sure how long they would hold up, but it sounds feasible to me. Worst case the polyurethane breaks down quickly and you're left with stock mount stiffness.

 

[MaD]

Ya I looked into that but the samples that were sent to me were either way to hard or just a sponge... but the cost seems a bit steep for the quantity they offer..

Sent from my SM-G900T using Tapatalk

 

[Dubbs_RS]

I'm an idiot. You linked the thread I was talking about... this is what I get for not clicking the link...

Pretty sure it would be the same idea here. Should work, but I'm not sure about the longevity of the fill on the mount.

 

[Palmaris]

I just did this. I will report on the improvements soon in my own thread and also in the one in the link. Seems great so far!

I used this stuff

old one

new one

had to drop my skid plate to get it in.

 

[Palmaris]

Improvements update time!!

After a few thousand kms, I don't know if I can say I can notice an improvement. On the good side, it did not cause any issues at all. If anything, there is a slight bit of more rattle noticeable when I am trying to feather the clutch in reverse. No biggie.

On the good side, I just like the way the car is driving right now. Its behaving well, the feel is great, is not giving me any real issues (I guess the only thing to fix is a slight pulsing under heavy braking, to be blamed on the original rotors)

drive on!

 

[skurtov]

Improvements update time!!

After a few thousand kms, I don't know if I can say I can notice an improvement. On the good side, it did not cause any issues at all. If anything, there is a slight bit of more rattle noticeable when I am trying to feather the clutch in reverse. No biggie.

On the good side, I just like the way the car is driving right now. Its behaving well, the feel is great, is not giving me any real issues (I guess the only thing to fix is a slight pulsing under heavy braking, to be blamed on the original rotors)

drive on!

Yeah I completed this too in a separate thread. I love the change, I used urethane compound and it cured nicely. I've immediately felt the shifting being much smoother and precise. There's a lot less weight shifting around when transitioning between gears and the power seems quicker to put down.