My cheaper/simpler tranny mount - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

xDanger_208x · 11-01-2013, 03:57 PM

So I installed the KartBoy shift bushing, Whiteline bushing insert and Mtec shift springs. While installing the bushing insert, I noticed the slop in the center carrier bolt that goes through the bushing.
I've seen some solutions on the market for this, but I decided to fix it myself.

It's just a simple tube I machined out of some aluminum round stock I had at the shop.
I will say.. these simple mods have drastically improved shifting and the over all "feel". So much so, that I had a short shifter but decided not to install it and sent it back. The $200+ will be better spent elsewhere.

neurokinetik · 11-01-2013, 05:33 PM

What are the dimensions of this piece? (ID, OD, length) I'm thinking there might be an off-the-shelf bushing at McMaster-Carr that would work, depending on the size.

xDanger_208x · 11-01-2013, 05:38 PM

I can't remember the length, but it's 20mm ID, 28mm OD

neurokinetik · 11-01-2013, 07:47 PM

http://www.mcmaster.com/#standard-sl...arings/=p71rzu

Looks like there are four possible options, the most expensive of which is still under $5

SAE841 material
6658K47 (16mm long, might be too short, $2.84)
6658K48 (20mm long, $2.88)

Alloy 932
7811K47 (16mm long, again, might be too short, $4.67)
7811K48 (20mm long, $4.74)

Personally, I'd just grab a 7811K48 and give it a shot. The alloy 932 seems to be the better material, and 20mm long is probably the right length. If it's too long, cut or grind it down a little.

Mr. · 11-01-2013, 09:24 PM

question. Stiffing the transmission does it effect the stress on the engine bay / chassis? I read somewhere that because you are stiffing up one part of the car it creates stress points on other areas. This looks like a nice DIY find.

xDanger_208x · 11-01-2013, 09:25 PM

It might/might not. I'll be replacing the motor mounts soon anyways.

ramiram1984 · 11-03-2013, 02:04 PM

The Perrin one is pretty inexpensive

11-01-2013, 03:57 PM	#1
xDanger_208x Senior Member Join Date: Oct 2013 Drives: Posts: 483 Thanks: 200 Thanked 129 Times in 77 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	My cheaper/simpler tranny mount So I installed the KartBoy shift bushing, Whiteline bushing insert and Mtec shift springs. While installing the bushing insert, I noticed the slop in the center carrier bolt that goes through the bushing. I've seen some solutions on the market for this, but I decided to fix it myself. It's just a simple tube I machined out of some aluminum round stock I had at the shop. I will say.. these simple mods have drastically improved shifting and the over all "feel". So much so, that I had a short shifter but decided not to install it and sent it back. The $200+ will be better spent elsewhere. __________________ My STX build thread http://www.ft86club.com/forums/showthread.php?t=55616

11-01-2013, 05:38 PM	#3
xDanger_208x Senior Member Join Date: Oct 2013 Drives: Posts: 483 Thanks: 200 Thanked 129 Times in 77 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I can't remember the length, but it's 20mm ID, 28mm OD __________________ My STX build thread http://www.ft86club.com/forums/showthread.php?t=55616

11-01-2013, 09:24 PM	#5
Mr. Supra Senior Member Join Date: Oct 2012 Drives: AE86 & BRZ Location: Merica maryland Posts: 877 Thanks: 717 Thanked 491 Times in 288 Posts Mentioned: 38 Post(s) Tagged: 2 Thread(s)	question. Stiffing the transmission does it effect the stress on the engine bay / chassis? I read somewhere that because you are stiffing up one part of the car it creates stress points on other areas. This looks like a nice DIY find. __________________ Build Thread YouTube Channel IG - Fwankyhong Subscribe

11-01-2013, 09:25 PM	#6
xDanger_208x Senior Member Join Date: Oct 2013 Drives: Posts: 483 Thanks: 200 Thanked 129 Times in 77 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	It might/might not. I'll be replacing the motor mounts soon anyways. __________________ My STX build thread http://www.ft86club.com/forums/showthread.php?t=55616

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11-01-2013, 05:33 PM	#2
neurokinetik Senior Member Join Date: Aug 2012 Drives: 2013 Scion FR-S Firestorm Location: Buffalo, NY Posts: 199 Thanks: 75 Thanked 70 Times in 43 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	What are the dimensions of this piece? (ID, OD, length) I'm thinking there might be an off-the-shelf bushing at McMaster-Carr that would work, depending on the size.

11-01-2013, 07:47 PM	#4
neurokinetik Senior Member Join Date: Aug 2012 Drives: 2013 Scion FR-S Firestorm Location: Buffalo, NY Posts: 199 Thanks: 75 Thanked 70 Times in 43 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	http://www.mcmaster.com/#standard-sl...arings/=p71rzu Looks like there are four possible options, the most expensive of which is still under $5 SAE841 material 6658K47 (16mm long, might be too short, $2.84) 6658K48 (20mm long, $2.88) Alloy 932 7811K47 (16mm long, again, might be too short, $4.67) 7811K48 (20mm long, $4.74) Personally, I'd just grab a 7811K48 and give it a shot. The alloy 932 seems to be the better material, and 20mm long is probably the right length. If it's too long, cut or grind it down a little.

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