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Old 03-28-2005, 04:34 PM   #1
urabus97
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Default Help With Shifter Linkage Bushings

I noticed that my shifter was sloppy, and after researching the site I came across quite a few people replacing the linkage bushings. So I printed out the skee-matic and went down to my local subaru dealer. Both of our printouts confirmed that the bushings for the linkage are the same ones that fit inside the shifter itself. But this isn't the case. The linkage bushings are much smaller than the ones on the shifter. They actually fit inside. So did anyone else have this problem? Little bit P-Oed right now.

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Old 03-28-2005, 04:45 PM   #2
gtwagon941
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the bushing you are wanting to change is accessed from underneath the car. Replacing it with an OEM bushing will do nothing for you, as the OEM bushing is the problem. www.kartboy.com for the bushings (replacements are 2 piece, OEM is 1) and then check out that site for help on the install or go to www.scoobymods.com

Jared
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Old 03-28-2005, 05:03 PM   #3
Gil
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^^ what he said.
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Old 03-28-2005, 08:19 PM   #4
subysouth
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No - not what he said - not exactly anyway.

KB doesnt make the shifter linkage bushings urabus needs. Nobody but OEM currently makes the linkage bushings although TiC is working on a 5-speed kit like the one they sell for the 6-speeds which also includes KB parts such as the stay bushings. The KB stay bushings are quite a bit larger than the linkage bushings.

I didnt know about the TiC kits until yesterday not that it would have helped as I already ordered the bushings for the 5-speed anyway.

If it makes you feel any better 2 of the OEM bushings are being made of a new material(blue instead of black.) Two of the bushings I got sent the wrong parts and am waitng on the correct versions.

If you look at the blowup you will see the linkage universal joint with one set horizontal and one set vertical. You need 4 bushings total for that linkage.

Tell them to double check before you place your order, its seems to be pretty confusing for the parts guys for some reason.

ss
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Old 03-28-2005, 08:49 PM   #5
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Heres a pic of the turninconcepts kit.



Thats the KB 6-speed shifter, grey KB stay bushings(the 5-speed KB stay bushings are black) and the 4 shifter linkage bushings.

ss
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Old 03-28-2005, 10:12 PM   #6
gtwagon941
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I didn't even know that those bushings were made. subysouth-in the picture you posted: 2 of the 4, smaller bushings go in that shifter itself, right? Now where do the other 2 go? I'm only familiar with the two on the shifter and the two large ones that are installed under the car.

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Old 03-28-2005, 10:31 PM   #7
lj17
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This is starting to sound like me last fall. I completely replaced all of my bushings in the shifter linkage (6 total) I left the original stay bushing, insteading of going for the 2-piece kartboy, because that bushing has virtually no effect on the side-to-side slop that most of us experience. That bushing, as far as I can tell, will only firm up the shifts a little bit. It may help the sloppyness a little, but it is not the main cure as some people say.

gtwagon941, yes, 2 of the small black bushings go in the shifter itself, while the other 2 (exactly the same) go in the other end of the shift rod. Then there are 2 more smaller ones that go in the "boss", as it is called, that goes over the transmission shaft. Those 2 smaller ones were where all my slop was comming from. The other 4 (same as in ss's pic) were basically fine, just a little brittle. Although I replaced them anyway. Oh wait, I forgot- I didn't even replace the 2 in the shifter (inside the car) because they were basically like new still.

I took a bunch of pics of all this and have all the part numbers and was going to do a write-up, but got lazy. But now that I have some motivation, I'll try to get something up to help you guys out.
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Old 03-28-2005, 10:38 PM   #8
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please do a write-up. I didn't know that there really was any cure for the side to side slop. I still don't understand where the bushings in question go, but with your write-up it will become clear, right?

thanks in advance.

Jared
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Old 03-28-2005, 11:17 PM   #9
subysouth
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The larger KB bushings go under the car in the stay rod, basically the assembly that supports the shifter and pivot point.

As I understand it, there a six total small bushings. Two in the shifter itself and four in the universal joint(2 on each side.) The other 4 small bushings pictured above go in the universal joint thats found in the shifter linkage rod. I dont think any of those are intended to go through the shifter itself. All four of them are installed under the car in the universal joint in the linkage rod.

Here's the explanation from TiC's site:

Quote:
If you have ever missed a 2-3 shift due to slop in the stick then this is your solution.

The first innovative new product direct from TiC are these shift linkage bushings for the 2004 and 2005 USDM Subaru Impreza WRX STi. These bushings will help eliminate the free play of the shifter leading to an overall better feel of the stick, and making the gear selection "click" into place.

To better understand what these do you have to understand the shortcomings of the stock linkage bushings. Between the shifter linkage arm and the control arm going into the transmission is a joint. It is this joint that is causing the lateral play in the stick.

The stock joint is made of a u-joint assembly consisting of two tubes welded at right angles. In these tubes are the bushings. Inserted into these bushings are sleeve bearings, and running through the sleeve bearings are the bolts that hold the whole u-joint between the linkage arm fork and the control arm fork.

In the stock configuration there are two places in this joint that create play in the system. The first is the clearance gap between the bolt and the sleeve bearing. The second is the gap between the sleeve bearing and the bushings. It is that second point that our bushings address. Over time the soft rubber bushings compress which translates to a greater amount of slop at the end of the stick. Our bushings are made from polyurethane and are designed with much tighter tolerences than the stock bushings. The tighter tolerences ensure significantly less slop over stock, while the polyurethane compound we use is much more resistant to compression, but at the same time compliant enough to keep NVH at an acceptable level.
My only disagreement with their assessment is that failure of these bushings also causes for and aft slop as well as lateral slop. If you watch the joint while someone cycles the shifter this will be obvious. I replaced the rear set of bushings with OEMs last week so its pretty fresh in my mind. I am waiting for correct bushings for the front part of the u-joint, theyre smaller than the rear versions.

ss

And lj may well be correct that the ones in either end of the shifter rod may be the same size(the two in the shifter inside the car and the rear set in the u-joint under the car.) I havent checked that.
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Old 03-28-2005, 11:34 PM   #10
lj17
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Yes they are the same. But, ironically, the 2 smaller bushing in the front of the 'universal' joint are were most of the trouble lies. It was for me anyway. The 4 black bushings in your pic look the same size, thats why I said what I did, but perhaps they changed the design of the joint so it uses the same size bushings throughtout, instead of 2 smaller ones up front. So you would be correct in saying that all 4 go in the unversal joint. My car is 10 years older, so the new STIs may be different, I don't know.

But at any rate, I hope my pics and write up clear up most of the questions. I have a lot of pics so, give me a little bit...
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Old 03-28-2005, 11:53 PM   #11
subysouth
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Quote:
Originally Posted by lj17
But, ironically, the 2 smaller bushing in the front of the 'universal' joint are were most of the trouble lies.
I would agree with that too. The front set had completely disintegrated and the rear set was 90% disintegrated(some remnants left.) Replacing the rear set cut the abundant slop about in half.

ss
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Old 03-29-2005, 12:05 AM   #12
Gil
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damn. i could definitely have the shifter closer to me. sucks being short.
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Old 03-29-2005, 02:46 AM   #13
lj17
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http://forums.nasioc.com/forums/show...85#post9339485

Just a warning, there are a lot of pics. So if you have 56K like me, you better go make a sandwich or something.
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Old 03-29-2005, 02:01 PM   #14
urabus97
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Excellent pics, excellent response. I appreciate everyones help on this. I went to the dealer to explain that the bushings were the wrong ones, but to my inquiry I found the response of "Ummmmm, they should fit, it says right here they should fit". So I had to take a few measurements and set-up a CNC mill to pop a couple out in no-time. 2 (nylon) and 2 (Poly) Infact I should start marketing the damn things. Anyhow, I have to install them this weekend, i'll let you know how it goes. Thanks again.
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Old 03-29-2005, 02:15 PM   #15
subysouth
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urabus which bushings were incorrect that they gave you? The confusion seems to be in those front set of smaller bushings in the universal joint.

Did you make the same size bushings out of two materials or two different sizes out different materials. And why?

ss
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Old 03-29-2005, 03:50 PM   #16
urabus97
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They gave me larger bushings for the front set of smaller bushings in the universal joint. The information i was given was that they Universal Joint Bushings and the Shifter Bushings are the same part number. This was untrue due to the fact that the front set of Universal Bushings are significantly smaller than those that were ordered for me. I had 2 sets of smaller bushings made out of ploy & Nylon. One set will be set in my car, and the other will be given to a friend. it's mostly trial and error. I wanted to see which wears faster. For my amusement only, but I like to tinker with stuff. The reason i made them is because for a person who is in desperate need of the parts i can't sit around and wait for numbnuts that work at Parts depo's to decide to help me. I have two Suby dealers close to me. both have ordered me the wrong parts several times.
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Old 03-29-2005, 03:58 PM   #17
subysouth
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Quote:
Originally Posted by urabus97
They gave me larger bushings for the front set of smaller bushings in the universal joint. The information i was given was that they Universal Joint Bushings and the Shifter Bushings are the same part number. This was untrue due to the fact that the front set of Universal Bushings are significantly smaller than those that were ordered for me. I had 2 sets of smaller bushings made out of ploy & Nylon. One set will be set in my car, and the other will be given to a friend. it's mostly trial and error. I wanted to see which wears faster. For my amusement only, but I like to tinker with stuff. The reason i made them is because for a person who is in desperate need of the parts i can't sit around and wait for numbnuts that work at Parts depo's to decide to help me. I have two Suby dealers close to me. both have ordered me the wrong parts several times.
Gotcha. Thanks for explanation. I had the exact same experience. I got sent the wrong bushings for the front too. The parts guys seem to be convinced all four bushings in that u-joint are the same and theyre not. When the parts guy finally sent me the blowup and I explained the number I needed he found it. I dont know what the problem was.

Its great that you have the resources to manufacture the bushings. Let us know how the wear experiment goes.

Where did you get your schematic btw? I couldnt find an online schematic for the linkage area, the parts guy had to e-mail it to me and its in a proprietary file format.

ss
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Old 03-29-2005, 04:23 PM   #18
urabus97
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"its great that you have the resources to manufacture the bushings. Let us know how the wear experiment goes."

Yea, I come from a long line of machinists, naturally I became a graphic Designer. but I still know enough to get by.

As for the schematic: I searched on Scoobymods.com

"ScoobyMods - Kartboy Kustoms Shifter Bushings"
or "Shifter Assembly"

I'd give you the direct link, but for some reason the site won't load.

I have a jpeg on my HD, if you want I can forward to your e-mail. Just PM me.
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Old 03-29-2005, 05:22 PM   #19
subysouth
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PMed you, thanks.

Scoobymods was going through some moving this past weekend. Maybe theyre still debugging.

ss
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