Write-Up: Cadillac STS Rear Sway Bar Install

Just did this mod today. Very happy with the results. Car seems to track much straighter , and seems to set into corners much better. I almost think it rides better to , as it seemed more composed when I went over the speedbumps in my apartment complex. For 30 bucks for the bar and 20 bucks for endlinks ( Moog) i am very impressed with difference this mod made.

Tip: use motor oil to get the bushing on/off the bars.

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1996 Riviera, 89k miles
Show: Tint ,Sherwood dash kit , PAU 17s , Magnaflow tips
Go: 1.9s ,FWI , 99+, Stage 1 TB, Plog + DP , 3.4" , Ported Gen III , decent tune.
Handlng: STB , Ma822s. STS 22mm rear sway bar.
Up next : KYB GR-2s ,

So have you now done both the front and rear with STS bars?
I can't remember if it was you who recently got a front STS bar for cheap.
If you did change the front did you use the stock STS bushings or get the greasable ones from Energy Susp.?

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Rickw wrote:

So have you now done both the front and rear with STS bars?
I can't remember if it was you who recently got a front STS bar for cheap.
If you did change the front did you use the stock STS bushings or get the greasable ones from Energy Susp.?

No i've just done the rear for now. I'm loooking into doing the front shortly as i've found some for about 25 bucks on carpart.com.

On the rear bar i just used the stock STS bushings. They were in pretty good shape so i saw no need to get new ones. ( bar was in "A" condition so under 60k).

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1996 Riviera, 89k miles
Show: Tint ,Sherwood dash kit , PAU 17s , Magnaflow tips
Go: 1.9s ,FWI , 99+, Stage 1 TB, Plog + DP , 3.4" , Ported Gen III , decent tune.
Handlng: STB , Ma822s. STS 22mm rear sway bar.
Up next : KYB GR-2s ,

What year range and other info is needed to search on car-part.
Do you need to plug in that it is an FE-3 suspension ?

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

I just selected 2000 STS stabilizer bar , and put in my zip code , and on the next page it will ask which bar you want ( Front , rear , FE3 , FE1 , FE0 etc...) You can also get the front bar from a late model Bonneville. It will pull up all models and model years with the same part number.

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1996 Riviera, 89k miles
Show: Tint ,Sherwood dash kit , PAU 17s , Magnaflow tips
Go: 1.9s ,FWI , 99+, Stage 1 TB, Plog + DP , 3.4" , Ported Gen III , decent tune.
Handlng: STB , Ma822s. STS 22mm rear sway bar.
Up next : KYB GR-2s ,

When I put in Cadilac STS stabilizer bar it kicks me to a screen to fill out my name, address, etc. and leave a note for what I'm looking for. Presumably because the search comes up with none listed.
Did you find some listed for sale?

Is the STS a Seville?
If so, a Sway Bar new from monsterparts for a 2000 Seville with "sport" suspension cost $95.

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

No there are dozens of sway bars listed. It is a seville. When you did the search on car-part.com did you put it in as a seville? It turns up several each time on line.

Yes thats the correct bar most likely. But i see little reason not to go used on something like that.

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1996 Riviera, 89k miles
Show: Tint ,Sherwood dash kit , PAU 17s , Magnaflow tips
Go: 1.9s ,FWI , 99+, Stage 1 TB, Plog + DP , 3.4" , Ported Gen III , decent tune.
Handlng: STB , Ma822s. STS 22mm rear sway bar.
Up next : KYB GR-2s ,

Yeh, i was putting in STS not Seville. That was the problem. There a few not too far from me at $50 - $70.00. I'll call acouple that are within 30 miles and see if i can pick one up cheaper than advertised.
On another note, Neverenough is advertising the front's on EBay the Addco bars for $200.00 w/ free shipping.
Made to fit several vehicles, but I found it under an STS listing. Addco # 2018 which fits our cars. (1 1/4" dia.)
Also, rear Addco bars for around $140.00 w/ free shipping (Addco # 2015)
The prices are cheaper than Summit and free shipping helps.

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Well, I finally got around to installing the Addco rear sway bar I've had kicking around here for quite a while.
Wish I hadn't waited so long. What a difference in correcting the inherent understeer on this car.
I don't know that I'll need to put a larger sway bar on the front. At least not until I put larger wheels and tires on and see how it handles then.
I haven't had the time to do much driving with this yet but the little test drive I took on the some sweeping turns was very noticeable improvement.
Very good mod for a not a lot of money.

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Glad you like it Rick. I had the same feeling about the front sway bar , but i feel like my front is still a little soft compared to the rear but GR-2s should fix that and the car should have a nice handling balance. Its nice to finally be able to slide out the rear a bit.

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1996 Riviera, 89k miles
Show: Tint ,Sherwood dash kit , PAU 17s , Magnaflow tips
Go: 1.9s ,FWI , 99+, Stage 1 TB, Plog + DP , 3.4" , Ported Gen III , decent tune.
Handlng: STB , Ma822s. STS 22mm rear sway bar.
Up next : KYB GR-2s ,

So, do you recommend doing the front now, before I put wheels and tires on it and see how it handles.?

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

just got my addcco sway bar #0020419. it does not fit. called john and hes looking into it. does anybody with a 95 have the addco sway bar? and did you run into any particular problems ? do thaty go on differently?

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95 riviera wht s/c...mods are in the works...mildly ported heads,manifolds and intake manifold. bilstein rear conversion. CCS custom springs.lowered 1". 160 stat.and a whole bunch of other s..t that i have to get out of my brain and onto the car.

a U=pull yard does not need to know your pulling these bars from a cadillac. id be telling them i got it from a cavalier or something cheap. No way would I pay over 200 for used sway bars.

BlownRiv wrote:

a U=pull yard does not need to know your pulling these bars from a cadillac. id be telling them i got it from a cavalier or something cheap. No way would I pay over 200 for used sway bars.

Nobody does pay that much.They're new from GM for not much more than that . The addco bars however are more expensive , but new , stronger and aftermarket , but for me , the fact that i could get an A condition STS bar for 1/5 of the cost of a new addco bar plus stories of addco bars having fitment issues , i decided to stick with the caddy bar.

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1996 Riviera, 89k miles
Show: Tint ,Sherwood dash kit , PAU 17s , Magnaflow tips
Go: 1.9s ,FWI , 99+, Stage 1 TB, Plog + DP , 3.4" , Ported Gen III , decent tune.
Handlng: STB , Ma822s. STS 22mm rear sway bar.
Up next : KYB GR-2s ,

I don't think anybody has paid $200.00 for a used Sway Bar.
The new Addco bars, that fit our cars are about $140.00 for the rear
and $200.00 for the front.
The Caddy STS bars are a larger diameter and work good but are a hollow tube.
If you want solid bar stock you have to get the Addco bars.

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98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.