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Old 03-15-2002, 09:20 PM   #1
Shinji N
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Smile Group N transmission mount

Wow, this is how the car is supposed to feel when you shift. I can understand why they don't include it stock though. While there is noticeable vibration and a little more noise in the cabin, this is a very worthwhile modification.

I only had two difficult steps in the installation. The 14mm bolts holding on the rear portion of the forward-back crossmember was terrifying to unscrew. Air tools or a 3 foot breaker would definately make it easier. The other thing is that I found it hard to install the sti mount without completely removing the whole crossmember assembly, i-club modification instructions be damned.

The shifting action has become a lot smoother. Downshifting from fourth to third no longer has an unwary wandering feeling; it just slips right in. Third to second downshifting has also firmed up a bit although I still need to double clutch in order for it to go in smoothly. Second to first is still a no-go though.
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Old 03-16-2002, 10:50 AM   #2
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I installed mine yesterday too! TOO BAD MY MOTOR IS BLOWN! LOL!
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Old 03-16-2002, 10:57 AM   #3
Peaty
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http://www.scoobymods.com/forums/sho...=&threadid=234

There are my instructions on install. I agree a worth while mod.

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Old 04-01-2002, 06:06 PM   #4
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I also installed my STi tranny mount on saturday. I think that I is a very worth while mod!!! I helps your shifting a lot more than any bushings will (if you ask me). As for the extra cabin noise I thought that it sounded really cool it was more rumbly then anything. I does virate more at idle but I don't mind very much vs. how much it helps other things perform.

I agree with Shinji N the 14mm bolts that you are supposed to loosen on the forward-back crossmember were very hard to loosen because of the 3rd cat. I actually ended up loosening the four 14mm bolts from the horizontal crossmember that the forward-back crossmember is connected to. I also had to use a breaker to get some of the bolts loose.

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Old 04-03-2002, 03:19 AM   #5
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Anyone find where the cheapest place to get them is yet?
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Old 04-03-2002, 02:16 PM   #6
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Cobb Tuning

They are the only ones I could find with them in stock, pretty cheap too, ordered mine yesterday

-Chad.
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Old 04-03-2002, 07:22 PM   #7
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Quote:
Originally posted by adamsrs
I installed mine yesterday too! TOO BAD MY MOTOR IS BLOWN! LOL!
adamsrs
The 2 incidents are not related are they?
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Old 04-04-2002, 03:26 AM   #8
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Quote:
Originally posted by 20mm
Cobb Tuning

They are the only ones I could find with them in stock, pretty cheap too, ordered mine yesterday

-Chad.
Ya, cobb's price is ok... seen it cheaper in the group buys though, and someone said AVSport was selling it for like $59, but its not on their site...
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Old 11-14-2004, 11:40 PM   #9
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rallispec.com
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Old 12-14-2004, 04:32 PM   #10
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Installed my Group N mount yesterday. NVH did increase as expected and as noted by others the engine sounds have more "texture". Shifting action is greatly improved and even clutch takeup feels better. A good tradeoff.
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Old 08-29-2009, 12:44 AM   #11
hklatte
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Anyone else got a group n mount on a 06/07 wrx? Honestly I don't really feel much different driving on the street/hwy....
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Old 08-29-2009, 12:50 AM   #12
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Quote:
Originally Posted by hklatte View Post
Anyone else got a group n mount on a 06/07 wrx? Honestly I don't really feel much different driving on the street/hwy....
it made a large difference on my 06, though not as much as the group n motor mounts.
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Old 08-29-2009, 12:55 AM   #13
hklatte
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Quote:
Originally Posted by eb_rat_7 View Post
it made a large difference on my 06, though not as much as the group n motor mounts.
Maybe my wagon is already loud and noisy because of the dp and catback, a little more NVH from the mount doesn't make much different...

shifting though, I really can't tell the difference...
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Old 03-08-2010, 01:17 AM   #14
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OP noted mount made shifting a lot smoother; anyone else notices the same thing?

I recently upgrade strut top to group-N and it did make noticeable difference.
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Old 03-10-2010, 05:51 AM   #15
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Hells yeah it makes shifting smoother, THINK ABOUT IT!
The transmission is slopping back and forth every time you are on and off the gas, between shifts, whatever. Heck itll slop around if you shake the car.
When you plant that thing still your actually shifting the motion of your arm into gear, not correcting with the transmission movement AND into gear.
And some of the higher up posts keep saying STi mount.. STi mounts are the same as the WRX mount with harder rubber while the Group N mount is filled in completely, big solid brick of 80A rubber.
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Old 03-10-2010, 11:47 AM   #16
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smoother shifting for sure, and i feel better handling also.
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Old 03-10-2010, 11:52 AM   #17
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I installed one this past Saturday. The biggest difference I noticed is mostly between upshifts from 1st to 2nd. This is definitely worth it, just comparing these two mounts holding them in your hands you can immediately tell it makes a big difference. The stock mount is such a joke, too much sacrifice on NVH.
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Old 03-11-2010, 01:19 AM   #18
relliMmoT
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Quote:
Originally Posted by fastwrx25 View Post
and i feel better handling also.
sry thats funny
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Old 03-12-2010, 11:50 PM   #19
txl146
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I installed GN transmission mount a couple days ago along with Kartboy crossmember bushings. First thing I've noticed is noticeable amount of starter noise similar to pitch mount.

Unfortunately, I really cannot feel any difference in shifting other than increased engine noise and vibration.
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Old 03-13-2010, 05:43 PM   #20
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Quote:
Originally Posted by txl146 View Post
I installed GN transmission mount a couple days ago along with Kartboy crossmember bushings. First thing I've noticed is noticeable amount of starter noise similar to pitch mount.

Unfortunately, I really cannot feel any difference in shifting other than increased engine noise and vibration.
Just about same here, except that I only noticed very cool noise in 1st and 2nd gear, sound more like straight cut gears, it awesome . I currently have:
- Rear Diff Mount and Outrigger Bushings
- Kartboy Shifter Bushing

This mount did reduce the slop that I have in my drivetrain however I still have a lot left of lash if I release clutch a bit early or give gas bit late @ low RPMs, maybe I need a pitch stopper and engine mounts. Overall thumbs up to Group N .
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Old 03-13-2010, 08:20 PM   #21
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Quote:
Originally Posted by txl146
I installed GN transmission mount a couple days ago along with Kartboy crossmember bushings.
All transmission mount installs should include crossmember bushings (TiC, Kartboy, or Whiteline) as a "while you're there"
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Old 03-13-2010, 10:37 PM   #22
txl146
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yes, I also noticed whining sound in 1st and 2nd gear - sounds a lot like PPG gear.
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Old 05-09-2010, 06:34 PM   #23
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I just installed my group N transmission mount and STi hardened crossmember bushings on my 2010 WRX, so I thought I would add some comments. First thing, with the radio off, there is definitely transmission whine. Any gear. More than I expected, but bearable. One thing that surprised me was that the car felt heavier going over bumps, kind of like the more direct connection with the rest of the car made everything mode in unison. There is definitely a bit more NVH, but not too much. Nothing in comparison to the whine. Throttle response is WAY snappier, and there is more of that nice snap into gears, similar two the improvement from the shifter bushings.

The stock bushing are total crap. I thought that the youtube video was exagerated, but I was wrong. The stock mount and bushings are made of the same rubber, and it is mushy as heck. My 7 year old was able to move the stock mount arond with no problem, but I could barely budge the group N. Good mod, I'll probably add some more comments after I break them in and see if the whine subsides. I also want to see how it affects the slack and driveline rocking at slow speed and stop and go traffic.
________
How mflb works

Last edited by Blue_Rex; 08-23-2011 at 04:53 PM.
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Old 05-10-2010, 06:49 PM   #24
Blue_Rex
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Slack and rocking in traffic is improved, but not perfect. I might have to go with the engine mounts next. I just dread the thought of putting them in myself.
________
MAXIMCAM

Last edited by Blue_Rex; 08-23-2011 at 04:54 PM.
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Old 08-27-2010, 01:47 AM   #25
kenliu84
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the GroupN Transmission Mount is definitely a worthwhile mod. I highly recommend it.

You should definitely remove the front, rear and center transmission crossmembers. It'll make it a lot easier.

- build-quality is pretty good. not only is the material much more hardened than stock, it also fills up the center gap that exists on the stock mount.
- combined with the crossmember bushings, it will improve the shifting dramatically. ever heard or read of "snick-snick" gearboxes in car magazines? yeah, now I know what they mean by that
- the drivetrain slop or bogging when shifting is pretty much gone. when you dump the clutch during 1-2 or 2-3 upshifts, the car will bog a little but it is a "controlled" bog. it's hard to explain, kind of like slow-motion bogging. and this should be expected when you purposely dump the clutch or you horribly miss rev-match
- there is definitely increased noise but it isn't bad at all (obviously subjective). you can tell the difference but it's overshadowed by the benefits and I'll stop noticing it in a few days.

as a side note, if you plan on installing upgraded crossmember bushings (Whiteline, TiC, Kartboy), you might as well upgrade the tranny mount. you are working in the same area and the stock tranny mount will start to wear out significantly faster, especially if you have other upgraded mounts/bushings along the drivetrain.

I'll upgrade the engine mount and possibly some driveshaft bushings in the future.

my drivetrain mods:
Pitching Stopper, Torque Solution
Tranny Crossmember Bushings, Whiteline RACE version
Rear Diff Mount Bushings, TiC Comfort version
Rear Diff Front Mount (outrigger) Bushings, Kartboy Comfort version
Rear Subframe Lock Bolts, Kartboy
probably insignificant but I'll list anyway:
Front and Rear Shifter Stay Bushings, Kartboy
Shift Linkage Bushings, TiC
Shift Lever Pivot Bushings, TiC

this review is from a night's worth of city and highway driving after installation, installing shift linkage bushings, and also greasing up the front and rear shifter stay bushings as I don't think I did that when I installed the Kartboy short shifter kit last year. I'll post up another review when I get a chance to test out NVH on long highway drives.

Here are some pictures:



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