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Go Back   IWSTI.com: Subaru WRX STI Forums > GD Series STi Discussion (2003/4-2007) > GD-Technical > GD-Suspension, Handling, & Stiffening


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Old 04-19-2008, 07:28 PM   #1
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Default HELP! TiC Rear Diff Mount Bushings + Outrigger

I was *attempting* this install tonight and I ran into a problem. Got all of the bolts loose except for the stud on the driver's side. It is double-nutted, but it is not budging. It soaked with PB for about an hour, no luck. I loosened the double nut to expose 3-4 threads of the post on the INSIDE (towards the diff.) I sprayed again and will let it sit overnight. Anyone have ANY suggestions???

For the outrigger bushings, the thin bushings are for the STi, correct? I thought I remember reading a post in here about someone swapping the thicks out for the thins with better results... Yes/No/Maybe?

Thanks in advance!!!


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Old 04-19-2008, 07:31 PM   #2
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Quote:
Originally Posted by boxtwo View Post
I was *attempting* this install tonight and I ran into a problem. Got all of the bolts loose except for the stud on the driver's side. It is double-nutted, but it is not budging. It soaked with PB for about an hour, no luck. I loosened the double nut to expose 3-4 threads of the post on the INSIDE (towards the diff.) I sprayed again and will let it sit overnight. Anyone have ANY suggestions???

For the outrigger bushings, the thin bushings are for the STi, correct? I thought I remember reading a post in here about someone swapping the thicks out for the thins with better results... Yes/No/Maybe?

Thanks in advance!!!
Regarding the double nut, if you look on TiC's site, there is a how-to on this kit, and it gives a method to remove it. I can't remember how to do it off the top of my head, but if you look, I'm sure you'll be able to find it.
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Old 04-19-2008, 07:36 PM   #3
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Thanks, but...I've read it so many times I almost have it memorized. Step 4 in the instructions... Yah, I'm a dork.
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Old 04-19-2008, 07:46 PM   #4
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

I ran into the same problem when installing the rear diff mount bushings on my car and I was also using PB. My crappy 17mm Metwrench brand wrench wasn't long enough (didn't have the torque) to remove one of the studs. I bought a stronger/longer 17mm wrench and it easily loosened the stud. I hope my post wasn't redundant, just offering a suggestion based on my experience.
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Old 04-19-2008, 10:52 PM   #5
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

To answer your other question, the thinner large diameter bushing is for the Forrester. The thicker large diameter bushing goes on top of the outrigger and the thicker small diameter washer goes on the bottom of the outrigger.
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Old 04-20-2008, 04:02 AM   #6
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Double wrench it. No need to buy longer wrench if you are in a pinch. OOh im a poet and didn't know it. Seriously though i rememer installing this had to double wrench that bolt
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Old 04-20-2008, 04:04 AM   #7
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Have you tried liftng the diff with a jack a bit? It should be supported anyways so it doesn't drop onto the exhaust, but the stud might be binding now that you've removed the other one.
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Old 04-20-2008, 07:38 AM   #8
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Quote:
Originally Posted by Deuce Cam View Post
I ran into the same problem when installing the rear diff mount bushings on my car and I was also using PB. My crappy 17mm Metwrench brand wrench wasn't long enough (didn't have the torque) to remove one of the studs. I bought a stronger/longer 17mm wrench and it easily loosened the stud. I hope my post wasn't redundant, just offering a suggestion based on my experience.
It is a decent wrench, leverage is poor. I have to go to either side of the temp sensor and it leaves no room.

Quote:
Originally Posted by williaty View Post
To answer your other question, the thinner large diameter bushing is for the Forrester. The thicker large diameter bushing goes on top of the outrigger and the thicker small diameter washer goes on the bottom of the outrigger.
The instructions say the thick is for the Forester... I remember reading something about the thin for the STi...

Quote:
Originally Posted by Kickstand View Post
Double wrench it. No need to buy longer wrench if you are in a pinch. OOh im a poet and didn't know it. Seriously though i rememer installing this had to double wrench that bolt
How can I double-wrench it if I am using the open-end on the bolt?

Quote:
Originally Posted by Draco-REX View Post
Have you tried liftng the diff with a jack a bit? It should be supported anyways so it doesn't drop onto the exhaust, but the stud might be binding now that you've removed the other one.
The studs are still in place, but I tried this too, getting all the tension off the bolts themselves.

I am on my way back out, hopefully I'll figure something out!
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Old 04-20-2008, 08:05 AM   #9
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

There is no set order on the outriggers. Just try different combos.

On the stud - if it will not loosen then heat it up with a torch, and let it cool.

Or put a punch on a couple of the flats for the nut and smack it with a hammer. I would say to normally to the punch on the end of the stud, but it's hard to get to on that one.
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Old 04-20-2008, 08:33 AM   #10
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Good mod to have on your STi, you'll be pleased with the result.
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Old 04-20-2008, 09:29 AM   #11
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

I had no issues when I did mine a month or so ago. I didn't use a normal wrench to break the diff studs free though, 2 ft. breaker bar + 17mm deep socket ftw!! Take your time and use the right tools, those studs are in there pretty good. As for the outrigger bushings, I used the think one as I understood the thinner one was for the GC8. I have been very pleased with this mod as I'm sure you will be too.
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Old 04-20-2008, 09:40 AM   #12
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Quote:
Originally Posted by boxtwo View Post
For the outrigger bushings, the thin bushings are for the STi, correct? I thought I remember reading a post in here about someone swapping the thicks out for the thins with better results... Yes/No/Maybe?

Thanks in advance!!!
I originally used the thicker ones for about 6 months. The noise while making tight low speed turns was getting really annoying so the guys at TIC suggested I try the thinner ones. This cut the noise down quite a bit. Barely get the noise at all. Performance-wise, I haven't noticed any difference between the two sizes. But at this point I've done so much other things to my driveline/suspension, it's really hard to feel the difference compared to when I first installed them when my suspension was stock.

One tip for getting out the rear diff bushings is dunk them in warm soapy water, they will pop right out.
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Old 04-20-2008, 09:41 AM   #13
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Got the stud loose. Time to buy a breaker bar because this is the 11ty millionth time I've needed one...

Had to pull the exhaust out, axle back section of the XR1 I put in the other weekend......to drop the diff enough to get the bolts out.

Thanks for all the suggestions on that stud. I hate being 100% clueless on how to approach a problem like that, but it worked out. Now I need to get it all back in!

As for the outriggers, I installed the thin bushes, but it is easy enough that I can swap them back out. I might just do it anyway.

Don't think I'll get to my TiC tranny crossmember bushes today
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Old 04-20-2008, 09:43 AM   #14
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Glad to hear you got it all apart. No toolbox should be without a good size breaker bar. $25 well spent in my book. At any rate, good luck getting it all back together and enjoy!
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Old 04-20-2008, 09:44 AM   #15
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Default Re: HELP! TiC Rear Diff Mount Bushings + Outrigger

Quote:
Originally Posted by JD_STI View Post
One tip for getting out the rear diff bushings is dunk them in warm soapy water, they will pop right out.
PB blaster, a vise, and a screwdriver to pry. Took only a few seconds per side.

(I did get to laugh at the first one as it "bounced around the garage!")


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