Drive train bushing advice - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

wootwoot · 06-02-2013, 05:49 PM

I have a set of sti motor mounts on order. I figured I might as well do them while I am changing out my header. Sti recommends that you change the transmission mount with the motor mounts. This makes sense as stiffer motor mounts and a soft tranny mount could cause some stress in various parts of the car. I already have a whiteline trans insert, subframe inserts, and diff inserts. My question is as follows: do you think my drivetrain is stiff enough as is to run the new motor mounts with no ill effect? Or is it worth the cash to buy the sti trans mount as well?

OrbitalEllipses · 06-02-2013, 06:14 PM

The STI trans mount would invariably be better than the stock mount, but you've already got a stiff piece of urethane jammed into the void of the stock mount. I wouldn't bother getting the STI mount unless you wanted every last bit of stiffness (and perhaps didn't want poly).

Save the $200 or however much it costs.

Calum · 06-02-2013, 06:20 PM

agreed

wootwoot · 06-02-2013, 08:39 PM

The sti mount would be nice because it would require no maintenance. But I think the whitleine material is fairly low maintence/low noise anyway. More then anything I just want to make sure the mounts and the bushing play nice together.

Sportsguy83 · 06-02-2013, 08:50 PM

Quote:

Originally Posted by wootwoot

I have a set of sti motor mounts on order. I figured I might as well do them while I am changing out my header. Sti recommends that you change the transmission mount with the motor mounts. This makes sense as stiffer motor mounts and a soft tranny mount could cause some stress in various parts of the car. I already have a whiteline trans insert, subframe inserts, and diff inserts. My question is as follows: do you think my drivetrain is stiff enough as is to run the new motor mounts with no ill effect? Or is it worth the cash to buy the sti trans mount as well?

You have no idea (or maybe you did read my thread on motor mounts change), but this is an AWESOME decision. It will save you so much grief doing both at the same time.

Also, you will be fine with the Whiteline tranny mount insert. Don't sweat it.

wootwoot · 06-02-2013, 09:08 PM

Ya... I actually got the idea by reading that thread.

PoWn3d_0704 · 06-03-2013, 05:13 AM

Yeah, so it looks like I'm going to be doing motor mounts as soon as I change headers. (Not tracking, but going FI eventually.)

Thanks for going through the trouble for us @Sportsguy83!

06-02-2013, 05:49 PM	#1
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 462 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Drive train bushing advice I have a set of sti motor mounts on order. I figured I might as well do them while I am changing out my header. Sti recommends that you change the transmission mount with the motor mounts. This makes sense as stiffer motor mounts and a soft tranny mount could cause some stress in various parts of the car. I already have a whiteline trans insert, subframe inserts, and diff inserts. My question is as follows: do you think my drivetrain is stiff enough as is to run the new motor mounts with no ill effect? Or is it worth the cash to buy the sti trans mount as well?

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06-02-2013, 06:14 PM	#2
OrbitalEllipses Banned Join Date: Jan 2012 Drives: Attitude Location: MD Posts: 10,046 Thanks: 884 Thanked 4,890 Times in 2,903 Posts Mentioned: 123 Post(s) Tagged: 4 Thread(s)	The STI trans mount would invariably be better than the stock mount, but you've already got a stiff piece of urethane jammed into the void of the stock mount. I wouldn't bother getting the STI mount unless you wanted every last bit of stiffness (and perhaps didn't want poly). Save the $200 or however much it costs.

06-02-2013, 06:20 PM	#3
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,868 Times in 1,499 Posts Mentioned: 82 Post(s) Tagged: 1 Thread(s)	agreed

06-02-2013, 08:39 PM	#4
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 462 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	The sti mount would be nice because it would require no maintenance. But I think the whitleine material is fairly low maintence/low noise anyway. More then anything I just want to make sure the mounts and the bushing play nice together.

06-02-2013, 09:08 PM	#6
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 462 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Ya... I actually got the idea by reading that thread.

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