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Old 03-15-2017, 11:21 PM   #1
BillyMagnum
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Member#: 219892
Join Date: Aug 2009
Chapter/Region: RMIC
Location: Denver,CO/MD
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00' RSTi (Sold)
17' PRD WRX CVT

Default Perrin Pitch Stop Mount Brace on a CVT Install (Yes it does work)

Haven't created a post in a while here, so if this is in the wrong spot please move it.
I own a 17' WRX CVT, but this install should be the same for 15-17s.

Anyways I received the mailer from Subaru explaining the extended warranty for the metal sheering off the firewall/cracking around the pitchstop mount itself and causing problems. I don't trust any dealer to fix this if the problem did happen with mine so I bought the brace for some peace of mind.
I don't thrash my car by any means, but I do enjoy some fun twisty roads here and there and would like to do an autocross event in the future.

Initially I had looked and I noticed that the brace was only for MT cars and I wanted to put it on my CVT....hmmm. After doing some research and looking under my hood I ordered the part and decided to go for it. I did not upgrade the pitch stop itself as I feel if something did happen it's likely Subaru will try to fight it for being an aftermarket part and I've seen some fitment issues with the CVT pitch stops anyways.

The Install:
Please complete at your own risk, this is only how I have done it, you may have a better idea.

You'll need to remove the engine cover and intercooler first.
Plenty of DIYs on how to do that on here. It takes 5 minutes. It's also in the Perrin instructions.
Follow the included perrin instructions step by step, except for the clutch line part.
A combination of those and my pictures should work just fine for you.

When you first remove the engine cover and top mount for a better view and room to install you'll notice a rubber gromit over the holes where a clutch would be. I removed the gromit and discovered that I could simply find 2 solid bolts, sleeves and nuts and could get the job done, so I did.
Untitled by David Gorgol, on Flickr
I rummaged around my parts and spare nuts and bolts and found 2 perfectly packaged subaru bolts that were just the right fit. Subaru Part#PT340292 BOLT - SUBARU (800110360) I did have to go to the hardware store and pick up two locking nuts and spacers/sleeves. The space accounts for where the clutch would be and the brace mounts around it, so obviously it needs to sit flush against something that isn't going to eventually come loose or smoosh(technical term) itself under pressure/movement.
Just reach around and push the bolts through by hand, be careful not to drop them behind the firewall.
Untitled by David Gorgol, on Flickr
As you can see I trimmed the gromit to still cover the big hole and allow for the bolts to still come through.
You can also see the sleeves I trimmed to install. After a quick test fit and sanding down all of the sharp edges on the sleeves with a dremmel, I was set.
You can see the sleeves are just slightly bigger than the bolt and the hole they go around, so there shouldn't be any issues, as there shouldn't be much movement in that area.
I measured a buddies 15 clutch thingy(also technical term) where the brace mounts to and cut the sleeves to fit. Measurements were 5/16ths.
Untitled by David Gorgol, on Flickr
Also a bit of trimming of the firewall covering is needed, you can see I did it here.
The final product!
Untitled by David Gorgol, on Flickr
Only thing I will be doing is getting two of the washer ended nuts to go on as there were not quite enough threads to get into the lock part of the nut, or you could just use a longer screw I guess. I also needed to unbolt the pitch stop on the tranny to shimmy it around to get the supplied bolt through the top. Please remember to torque all nuts and bolts to the specs provided in the instructions. Installing of the rivet nuts was easy and had no issues there. After the install I must say it feels as if the car does shift smoother, but I'm sure that's just all in my head haha.
In the future I may get a back plate with the bolt threads already installed on it and climb up under the dash and push it through to reinstall the part as I feel it could be a more sturdy way to complete the job, then place a plate over the front side under the hood the same thickness almost like the clutch is on the manuals and it will eliminate the need for the sleeves I installed and as I said should be more supportive.

Thanks for reading and hopefully this helps some other CVT'ers out!
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Last edited by BillyMagnum; 04-02-2017 at 04:17 PM. Reason: pics added!
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Old 03-16-2017, 12:57 AM   #2
Slurmdaddy
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Default

Buddy of mine with cvt had the recall, but the noises remain so sounds like you made the right decision. But I sure hope there's no issues with SOA and having a different pitch mount. What worries me is I haven't replaced brackets to compensate the stiffer bushings.
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Old 03-16-2017, 01:21 AM   #3
BillyMagnum
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00' RSTi (Sold)
17' PRD WRX CVT

Default

Quote:
Originally Posted by Slurmdaddy View Post
Buddy of mine with cvt had the recall, but the noises remain so sounds like you made the right decision. But I sure hope there's no issues with SOA and having a different pitch mount. What worries me is I haven't replaced brackets to compensate the stiffer bushings.


Out of curiosity what noises was he experiencing? I wanted to keep it as stock as possible to be safe for now, I don't need it upgraded anyways for what I do with the car. What bushings did you upgrade? I noticed awhile back when I would put the car in reverse while mostly cold it would squeak but no other time. It was also on an incline so I figured it was semi-normal but wanted to be safe so went ahead and did it in case it was related. I haven't heard the squeak in awhile tho. I inspected my firewall closely and everything seemed to be in order. I think it's pretty rare honestly. My buddy beats the hell out of his 15 6sp and his was fine. I think the part is also geared more for those that shift manually as well as the tranny/motor will definitely move more as opposed to a smoother shifting cvt
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Old 03-16-2017, 09:20 AM   #4
Slurmdaddy
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His would creak at bumbs and such. I drove in it once and could notice it.. I installed the group n pitch stop mount. It's identical to the stock oem ones but just has stiffer rubber bushings since they're on the STI's from factory.
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Old 03-16-2017, 05:27 PM   #5
BillyMagnum
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Location: Denver,CO/MD
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00' RSTi (Sold)
17' PRD WRX CVT

Default

Quote:
Originally Posted by Slurmdaddy View Post
His would creak at bumbs and such. I drove in it once and could notice it.. I installed the group n pitch stop mount. It's identical to the stock oem ones but just has stiffer rubber bushings since they're on the STI's from factory.
Interesting, good to know in case I hear anything. I don't think you'll have much to worry about there. Should be pretty identical mounting in the STI's, I don't remember if the recall was also for STI's too tho.
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Old 03-17-2017, 12:33 PM   #6
PERRIN_Thomas
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Wow this is awesome! We are looking into a hardware kit for the CVT customers.

Now regarding if you need a back plate, I don't think this will be necessary because the forces are going to be a side to side movement, but maybe some large fender washers will help!
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Old 03-17-2017, 11:07 PM   #7
BillyMagnum
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Member#: 219892
Join Date: Aug 2009
Chapter/Region: RMIC
Location: Denver,CO/MD
Vehicle:
00' RSTi (Sold)
17' PRD WRX CVT

Default

Quote:
Originally Posted by PERRIN_Thomas View Post
Wow this is awesome! We are looking into a hardware kit for the CVT customers.

Now regarding if you need a back plate, I don't think this will be necessary because the forces are going to be a side to side movement, but maybe some large fender washers will help!
I made it work for now, but would prefer a more fitted and more precisely measured spacer/washer. Please let me know if you guys do this! If you need more information or details let me know, I'm happy to help! Thanks! -Dave

Glad you guys saw this thread. It's nice to see vendors looking into their products!
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Old 04-02-2017, 04:19 PM   #8
BillyMagnum
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17' PRD WRX CVT

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updated the bolt part# for anyone that may need it, As I said its just the perfect length but don't buy a normal locking nut as I did, but the flanged/washer ended locking nut, It's shorter and should work better until hopefully Perrin comes out with their adapter kit.
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Old 05-27-2017, 10:31 PM   #9
BillyMagnum
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bumping this up for anyone who may need it! It keeps getting off the pages
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Old 07-11-2017, 02:31 PM   #10
BillyMagnum
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Location: Denver,CO/MD
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17' PRD WRX CVT

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ttt for someone who will need it!
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Old 07-12-2017, 11:18 AM   #11
djemzine
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Location: Richmond Hill, ON, Canada
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2015 WRX CVT
WRB Pearl

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Has any CVT folks had issues with this yet?
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Old 07-13-2017, 09:32 PM   #12
BillyMagnum
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Join Date: Aug 2009
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00' RSTi (Sold)
17' PRD WRX CVT

Default

Quote:
Originally Posted by djemzine View Post
Has any CVT folks had issues with this yet?
I have not had any issues or seen any with cvts. My buddy just hit the drag strip yesterday with his cvt and had no issues. I plan on doing a track day in august so we'll see how it holds up. I just want to try to prevent any issues before they occur. I also don't beat the crap out of my car regularly so I think that is good preventative maintenance as well.
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Old 08-11-2017, 05:25 PM   #13
BillyMagnum
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00' RSTi (Sold)
17' PRD WRX CVT

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ttt for my cvt's!
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Old 10-21-2017, 07:47 PM   #14
versedispersed
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2017 WRX CVT (Stg 2)
DGM

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Does Perrin have an installation guide for this? My car doesnít have the threaded holes in the firewall under those two hoses in the right.
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Old 10-22-2017, 12:30 PM   #15
caryfd227
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Galaxy Blue Pearl

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The kit comes with quick nuts for you to install
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Old 10-24-2017, 05:19 PM   #16
versedispersed
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DGM

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I understand that. So do I have to drill holes in the firewall? Again, I raise the question: Does Perrin have instructions for WRX CVTís?
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Old 10-25-2017, 07:27 PM   #17
BillyMagnum
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17' PRD WRX CVT

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Quote:
Originally Posted by versedispersed View Post
I understand that. So do I have to drill holes in the firewall? Again, I raise the question: Does Perrin have instructions for WRX CVTís?
no cvt instructions...that is the point of this guide. If you read above it will explain what I did.
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Old 10-27-2017, 09:21 AM   #18
versedispersed
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Join Date: Jul 2017
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2017 WRX CVT (Stg 2)
DGM

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Quote:
Originally Posted by BillyMagnum View Post
no cvt instructions...that is the point of this guide. If you read above it will explain what I did.
Thanks, one thing I donít get is how you put the bolts through the firewall. Did you go through the inside behind the dash?
Itíd be nice if Perrin took your findings/results and provided instructions.
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Old 10-27-2017, 10:43 AM   #19
PERRIN_Thomas
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LBP

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No instructions yet or updated part for the CVT, but! if we get more demand we might make this happen sooner!
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Old 10-29-2017, 10:05 AM   #20
versedispersed
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2017 WRX CVT (Stg 2)
DGM

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Quote:
Originally Posted by PERRIN_Thomas View Post
No instructions yet or updated part for the CVT, but! if we get more demand we might make this happen sooner!
Thanks for the reply Thomas.
Iíll let some CVT folks know.
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Old 10-29-2017, 11:59 AM   #21
djemzine
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WRB Pearl

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I would also appreciate the installation steps for the CVT WRX
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Old 10-07-2019, 06:02 PM   #22
Nahoward
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Location: Dallas, TX
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Lapis Blue

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Oddly appropriate for Halloween... but RISE FROM THE DEAD! /necro

I'm working on this this evening, and while the kit doesn't yet have a CVT variant, or CVT instructions, I am basically doing what was suggested and running a pair of M10 bolts through the firewall. I managed to use one of the 3' long bolt grabbers (the things you use when you drop something down in the engine after you say a few choice words), and pushed it through the insulation into about where the accelerator would be, and (with the help of another) I was able to get the bolts in place.

After that, it's basically business as usual, as stated up thread. I'm still mid install (got chased inside because of rain) but it's looking like this is a go for the '18 CVT.

@Perrin: If there was an option for a bracing bar that could be used with the handle used for the rivet nuts that would go behind the grommet, that would help with the install, especially if there was an included pattern that helped you trim down the grommet to work with the existing kit. Other than that, everything else seems like it's really straight forward.
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