Jamie@WORKS

iTrader: (10)

WORKS has added our latest bushing to the WRP USB lineup. The new rear differential support arm bushing is now available to compliment the rest of our suspension bushings.



http://www.worksevo.com/store/produc...products_id=69

Available bushings (includes one pair w/ grease pack):

-Front Sway Bar – 24mm (OEM Size) $19

-Front Lower Control Arm* $69

-Rear Trailing Arm, Lower Front* $89

-Rear Upper Control Arm, Front* $149

-Rear Lower Control Arm to Shock* $49

-Rear Upper Control Arm, Rear* $49

-Rear Toe Control Arm, Inner* $39

-Rear Bump Steer Correction Kit $59

-Rear Differential to Chassis* $89

-Rear Differential Support Arm* $109

-Rear Sway Bar – 22mm (OEM Size) $19

*Included in WORKS USB Kit $499 (add $20 for Bump Steer Correction substitution)

Erik@MIL.SPEC

iTrader: (94)

What does this do specifically that the other rear diff bushing doesn't?

binh

iTrader: (40)

Can we get a picture of this installed on the car?

Jamie@WORKS

iTrader: (10)

It WORKS in a different plane of movement--basically 90* in relation to the rear diff to chassis set. I haven't installed my set to give a first-hand account of the change, but will be a good candidate as all the other USB bushings are on the car and this will be the only difference before/after. The only other car in-house that has them (in prototype form) is the WORKS Time Attack EVO and that's a whole other animal.

Jamie@WORKS

iTrader: (10)

Here's a set pressed into the support arm itself. As mentioned above, install is just around the corner.

Dave Mac

iTrader: (2)

You should really have a good diagram of the suspension and hilight where each of your bushings would go and some copy stating what each bushing helps with. Example, rear diff arm bushings help with removing "slop" in the rear diff to get power down more quickly. Explain how each bushing helps with suspension geometry weither it's lateral or longitudnal.

I'd like to purchase a few but I already have the energy suspension bushings and I'm not sure which to add to it to help. Some diagraming and detailed copy would help me make my decision. Otherwise I won't buy because I'm not clear on what to add and why I should add it.

Take it for what it's worth Jamie, just my 2 cents.

Dave Mac

Jamie@WORKS

iTrader: (10)

Very good points... well worth the 2 cents

By chance, we are in the middle of updating our install instructions and have created the following diagrams based on the factory service manual.

Sway Bars (front and rear):





Front Control Arm:



Rear Trailing Arm:



Rear Toe Control Arm/Bump Steer:



Rear Upper Control Arm (front and rear):



Rear Lower Control Arm:



Rear Differential (chassis and support arm):





In general, the bushings help reduce the inherent flex promoted by the original rubber components. Some have a more pronounced effect than others (such as the rear trailing arm) while others are subtle (such as the sway bar bushings). All work at maintaining undesireable changes in suspension geometry while under load and the bump steer correction even alters the suspension geometry slightly. The rear diff bushings act to solidify the rear end movement, which you may have noticed a thump during hard gear changes with the OEM bushings. I know this doesn't answer everything you had outlined, but I'll follow up with more specifics later. Hopefully, the pictures can help bring things to light.

In Dave Mac's case, the bushings not already part of your current Master kit would be:
Rear Toe Control (or Bump Steer)
Rear Upper Control Arm (both front and rear)
Rear Lower Control Arm to Shock

CoreyR

iTrader: (5)

GREAT post Jamie! Thanks for that.

Corey #89 STU

CoreyR

iTrader: (5)

One question though...

Are you planning on offering the other bushings for the LCA in the future? It looks like you only have the one for the rear shock right now. What is the reasoning behind not replacing the other bushings in the LCA?

Corey #89 STU

Dave Mac

iTrader: (2)

Great work Jamie. I'm going to attach this to our STU build thread in motorsports. Great reference point!

Jamie@WORKS

iTrader: (10)

I haven't heard of any plans to replace the other points of the rear LCA. The inner and outer connection points of the LCA house a pillow ball vs. the shock connection "only" being a bushing. I'm not an engineer, but know that there would be a lot more involved (time, effort, money) in providing a suitable replacement. We could probably put together a urethane bushing without too much fanfare, but incorporating a spherical bearing is where the challenge lies. I know of one offering (Nagisa) that replaces the entire LCA and houses such bearings, but have no experience with it.

MRinChrist

How many of these pieces require a press? Which ones?

wilson1

iTrader: (63)

looks good!

MRinChrist

I shall look elsewhere.

Fireball

iTrader: (15)

Everyone of them require a press. Well, except the sway bar ones, but I really dont count those.

This is probably one of the hardest installs to do, short of replacing the engine.

I'm in the process right now of finding a place to properly machine the pressing sleeves needed for these. I have the full Energy Suspension Poly bushing kit.