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Old 11-26-2001, 09:36 AM   #1
Ginseng
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Default Kartboy Kustoms Shifter Bushing: Impressions and Perspective

No pictures but the install is pretty straightforward. There are several sources for install pics and directions.

Bottom Line: For a mere $35, you get...about $50 worth of improvement in shifter feel. This is with the stock WRX shifter linkage. Shifter movement is a little more precise, especially at the ends of the shift lever travel. Little to no discernible increase in NVH (noise, vibration and harshness).

Here's why I think this is:
First of all, I thought the bushing goes on a piece of the shifter assembly that actually moves. It does not. The bushing sits in the end of the stay rod that is bolted to a stationary bracket. When you move the shift lever, this end of the stay rod merely reacts to the push-pull motion. So replacing the soft, finned stock bushing with the hard urethane bushing will provide a more precise-feeling resistance only when the shifter is being engaged and when it's near the end of its travel, such as when a gear is nearing full engagement. When the shifter is in neutral or in gear, the same looseness or "slop" that was there with the stock bushing will still be there. The only way to get rid of that would be to replace the entire shifter linkage with another unit, such as the STi/SPT.

Secondly, there are a total of 5 additional bushings in the shifter linkage. There are two between the tranny boss and the shift rod, two more between the shift rod and the shift lever and one under the cup where the end of the shift lever sits. So, basically there's a lot more rubber than what the Kartboy replaces. I think the benefit of the Kartboy (or other equivalent replacement) is that the stay rod bushing is by far the largest and one of the easier ones to replace.

Was it worth it? Sure. The dollars outlayed were small enough. Just don't expect those two little pieces of 95A polyurethane to rock your world.

Wilkey

edit: The bushing is actually closer to 95 Shore A scale, if I were to estimate. 95 on the D scale would be like granite.
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Last edited by Ginseng; 11-27-2001 at 11:02 AM.
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Old 11-26-2001, 10:50 AM   #2
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<<When the shifter is in neutral or in gear, the same looseness or "slop" that was there with the stock bushing will still be there. The only way to get rid of that would be to replace the entire shifter linkage with another unit, such as the STi/SPT.>>



And that, sir, is why I went with the STi SS kit with Kartboy bushings. It's an unreal combo.

Kevin
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Old 11-26-2001, 12:19 PM   #3
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Just wait till you get the "Other" bushing that kartboy makes (if they ever release it to the general public) then it will feel even better!

Erick Davis
(Sponsored by Kartboy whore)
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Old 11-26-2001, 12:41 PM   #4
Ginseng
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Intriguing. The only other bushing that I can see that is not paired (as in, on both sides of a metal spacer) would be the one under the the base of the shift lever. This appears to be the second largest bushing and, perhaps not coincidentally, on the other end of the stay rod from from the "commercially available" Kartboy bushing.

In any case, this bushing would also be replaced if one swapped out to an STi shifter assembly.

Comparing the feel of my linkage to rkkwan's STi/non-Kartboy, I'd say his rates an 8 in positivity and smoothness. My stock/Karboy would rate a 6. I can only imagine that the STi/Kartboy combo would rate a 9+.

Wilkey
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Old 11-26-2001, 12:43 PM   #5
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Thats the one! Way cheaper than STi.
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Old 11-26-2001, 01:10 PM   #6
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Hmm, looks like I'll be giving Mark and Tom a call. Wonder if they'll sell me one to test?
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Old 11-26-2001, 01:12 PM   #7
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They should have let me test those exhaust hangars, how dare they!
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Old 11-26-2001, 04:56 PM   #8
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Ginseng - So, it's worth $50? Damn you and gtguy - I have to get it now myself!

-Ray
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Old 11-26-2001, 09:52 PM   #9
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Quote:
When the shifter is in neutral or in gear, the same looseness or "slop" that was there with the stock bushing will still be there. The only way to get rid of that would be to replace the entire shifter linkage with another unit, such as the STi/SPT.
unfortunatly this is not true, the "slop that is in the nutral position is internal (inside the transmission)
its one of the drawbacks to a linkage shift transmission vs. a toploader ala mustang.

the "special bushing" is in the works. we have a few prototypes floating arround for testing.
[email protected]
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Old 11-26-2001, 10:22 PM   #10
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Quote:
Originally posted by [email protected]

the "special bushing" is in the works. we have a few prototypes floating arround for testing.
[email protected]
ahem, Tom, you know who can/will/wants to test the prototypes
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Old 11-27-2001, 09:27 AM   #11
Ginseng
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Tom,

Thanks for the clarification on the "neutral" slop. Then it still makes sense that the improvement in feel from dropping in the STi unit is true while in-gear.

Gonna Paypal you for those prototype bushings. BTW, what's the install like? Anyone document this yet?

Wilkey
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Old 11-27-2001, 09:52 AM   #12
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Quote:
Originally posted by Ginseng
Anyone document this yet?

Wilkey
I would have but Mark wouldn't let me

PM or E-mail me and I'll tell you what I found during the install.
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Old 11-27-2001, 10:14 AM   #13
Ginseng
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djerickd,

Consider yourself PM'd

Wilkey
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Old 11-27-2001, 10:23 AM   #14
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PM'ed you back sucka!!
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