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Old 01-15-2002, 01:40 PM   #1
wrx182
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Default STi Group N Tranny Mounts

Great addition to the WRX! Easy to install & VERY nice results with the tranny...All sloppy feelings are gone - good, stiff, crisp shift & when you let off the gas at high revs, that kind of swaying feeling is gone from the tranny. Got mine along with the engine mounts, which I haven't had time to install yet, from www.cobbtuning.com
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Old 01-15-2002, 01:44 PM   #2
illmatic
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hows the NVH?

Jsy
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Old 01-15-2002, 02:07 PM   #3
wrx182
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NVH?
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Old 01-15-2002, 02:21 PM   #4
illmatic
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Noise Vibration Harshness...Will it get annoying on long drives?

Jsy
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Old 01-15-2002, 02:37 PM   #5
wrx182
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no way...unless you have the fan & radio off and really listen for it, you won't even be able to tell...and even then, the only time you can hear it is when you're crusing along at a fairly high rev and let off the gas - it doesn't shake or move like it used to, but you can hear the gear winding down much more...but like i said, you cann't notice it unless you've got everything off and your looking to hear it.
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Old 01-15-2002, 02:51 PM   #6
Zahnster
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Where did you get them from? How much?
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Old 01-15-2002, 03:02 PM   #7
wrx182
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$170 for the 2 engine mounts and the tranny mount from www.cobbtuning.com - great price if you compare it to others.
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Old 01-15-2002, 06:58 PM   #8
lstepnio
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I really want to get these, but I'm deathly afraid it's going to make too much noise and vibration. I don't mind it as much, but I would hate to have my wife say stuff like "hmmmmm, that's pretty noisy. My RSX does not make noises like that. ".

Do you have a short shifter w/ bushings installed as well? I did not think my kartboy setup added that much noise at all, a little but not too enough for my wife to notice.

Quote:
Originally posted by wrx182
no way...unless you have the fan & radio off and really listen for it, you won't even be able to tell...and even then, the only time you can hear it is when you're crusing along at a fairly high rev and let off the gas - it doesn't shake or move like it used to, but you can hear the gear winding down much more...but like i said, you cann't notice it unless you've got everything off and your looking to hear it.
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Old 01-15-2002, 11:43 PM   #9
Evan J. Kelly
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since he's all lazy and stuff... Jim's got an STI short shifter and the kartboy bushings.

come on jim... oompa-loompa!
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Old 01-17-2002, 08:39 AM   #10
wrx182
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I have the STi short shift kit along with the Kartboy shifter bushings.

Dude, trust me, go for it. You'll be very happy with the results, of the tranny mounts atleast. I still haven't put the engine mounts in, and if you're worried about vibrations, those are the ones I'd worry about....But the tranny mount is noise free - go for it, it's so worth it.

I'll let you know how much, if any, noise results from the motor mounts when i install them.

Jim
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Old 01-17-2002, 11:25 AM   #11
bemani
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Not much noise, but plenty of vibration that you can feel! Love the low frequency rumbling!
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Old 01-17-2002, 12:42 PM   #12
wrx182
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bemani: w/ just the tranny mounts? i really don't feel any negative effects from this install....or are you talking about the engine mounts?
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Old 01-18-2002, 09:22 AM   #13
lstepnio
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I can understand the advantage of the transmission mounts, but I'm still a little unclear on the advantage of the engine mounts. Can someone explain?
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Old 01-18-2002, 11:44 AM   #14
bemani
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Quote:
Originally posted by wrx182
bemani: w/ just the tranny mounts? i really don't feel any negative effects from this install....or are you talking about the engine mounts?
Nope, I only have the transmission mount.
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Old 01-18-2002, 01:33 PM   #15
Conduit
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The stiffer engine mounts more firmly afix the engine into position, and as you make more power this is a valuable modification. The tradeoff is more cabing noise and vibration.

You can't underestimate the value of stiffer mounts in a high power car. I have had mounts tear completely and drop the engine. This is bad
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Old 01-18-2002, 01:46 PM   #16
lstepnio
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So you are saying that on a stock WRX the engine mounts are not really a worthwhile mod for the masses?

Any negative effects or potential problems from having the stiffer tranny mounts w/o the engine mounts? I was under the impression that one without the other was a bad ideas for some reason?! Thanks for the clarity.
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Old 01-19-2002, 08:40 AM   #17
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You shouldn't have any negative effects of running either a stiffer tranny or engine mount without the other. All you're doing it is making one or the other stay in place better under torque. I'd recommend the tranny mount first, as it will give you the most immediate benefit. With the additional vibration comes a satisfying click, especially with a better shifter and bushings.

I would suggest stiffer engine mounts for a stock car are unnecessary. That is assuming the stock ones are a good balance between vibration and rigidity. All you'll likely get with the stiffer mounts is more vibration, for marginal benefit. That said, I have changed them on other high power cars and new vibration wasn't bad, especially with V8s. Not so good changing them on a 4.2 XKE.

IMHO, I would not even begin to consider stiffer engine mounts until on the order of 100 additional hp on this car, and then it depends on how you're using it. Routine hard shifts, like regularly drag racing or ...., might want to do it earlier. Think I'm at least there in hp, and still have not changed the engine mounts. The added daily vibration, already enough through the tranny, isn't worth the benefit for the rare trip to the track.

My $.03.

Reggie
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Old 01-22-2002, 09:23 AM   #18
lstepnio
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Good reply, thanks for taking the time. I think I'm going to order those tranny mounts.
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Old 01-22-2002, 10:39 AM   #19
bobgrice
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I will report that, after installing the STi engine and tranny mounts, my car feels great. Especially the transmission. I can't really tell much difference with the engine mounts, although I'm sure they're doing their job. I don't detect any additinal NVH from them.

The transmission shifts are cleaner and crisper. It really feels different. I have the STi short shifter, Kartboy bushings, the new STi tranny mount and also just replaced tranny fluid with Redline 75W90NS.

What a difference! Easy, cheap mods that really make the car more enjoyable.
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