Jeep WJ Grand Cherokee Addco Sway Bars Upgrade

By Jeep Experts

Welcome to the in-depth web page on WJ Generation Jeep Grand Cherokee addco sway bars improve. We have organized as a lot data as we may discover right into a useful article under. Is one thing incorrect or lacking? Please get in contact with us and we’ll repair it!

There is a dramatic distinction within the dimension and weight between the rear manufacturing facility bar and the Addco bar. The thicker bar gives almost 700% extra resistance than the manufacturing facility bar.

One of the extra widespread complaints amongst Grand Cherokee house owners is the quantity of sway and physique roll that’s current. Therefore, it’s no secret that one of many first mods that GC fanatics carry out is to improve the inventory sway bars to heavy responsibility efficiency variations from Addco Manufacturing. Most house owners elect to only do the rear improve, the distinction within the cornering and dealing with is superb. Body roll and jiggle is just about eradicated. The entrance bar improve gives some enchancment in oversteer however the distinction just isn’t that noticeable.


Understeer is the scenario that almost all automobiles usually have off the showroom ground. What this implies is the car “pushes” by a curve. This is often attributable to having a manufacturing facility put in entrance bar and both no rear bar or a really light-weight rear bar compared to the entrance bar. So, by including a rear bar, a lot of the understeer will likely be eradicated.


Oversteer is mostly characterised by the rear finish ‘spinning out’. With the addition of a heavier entrance bar, oversteer will be corrected.

Sway bar torque resistance

Torque resistance of an anti-sway bar modifications with the sq. of the cross sectional space. Therefore, even a small enhance in diameter gives a serious enhance in anti-sway bar effectiveness. The 1″ Addco bar, for instance, gives almost 700% higher resistance than the 9/16″ manufacturing facility bar. In comparability, stepping right down to a 7/8″ Addco bar lowers the resistance to 382% (in case you are solely going to improve the rear bar, Addco recommends the 7/8″ bar).

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The car physique can not roll with out pushing down on one finish of the anti-sway bar and lifting on the opposite. As the midsection of the bar resists twisting, it limits the quantity of physique roll. This is what’s going to hold your automotive flat by curves.


Installation of the rear Addco bar is straightforward. Remove the two bracket bolts and the hyperlink arm nut from both sides to take away the manufacturing facility bar, and exchange it with the Addco bar. This will be achieved in a half hour or much less, and with out jacking up the automotive or eradicating any wheels. Because most suspensions journey in an arc, using a raise or supporting the car by the body and permitting the wheels to hold may cause bar misalignment and set up difficulties. The suspension should be at static journey peak for this set up.

See the chart under for Addco half numbers.

Adding hyperlink arm washers (rear bar)

Due to the protusion on the manufacturing facility hyperlink arm bolt, it is strongly recommended so as to add a 1-1/4″ washer (3/4″ inside diameter) to every aspect, as proven within the picture above. This will stop extra motion of the bar. These washers aren’t included with the Addco kits and should be bought at an area screw/bolt specialty retailer. Update: Some house owners have reported that the washers weren’t wanted.

Bushing improve

Energy Suspension greasable bushing and clamp set for the rear sway bar.  (1″ model proven).

Many house owners improve the Addco bushings provided with the rear bar. Energy Suspension makes a set with a novel channel design and zerk fittings, permitting grease to move to the interior bushing surfaces which prevents squeaking. The Addco provided urethane bushings that include the entrance bars are fairly gentle and have a tendency to squeak. There are not any aftermarket bushings out there for the entrance bars as a result of nonstandard bushing design of the entrance manufacturing facility bushings. It’s potential to make the Addco entrance bushings greaseable by drilling and tapping the inventory metallic bushing shells and including grease fittings. You then drill a corresponding gap by the bushing for the grease to move by.

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NOTE: Redesigned fall 2003 to remove interference with gasoline tank skid plate


Rear: Addco p/n 684 (1″) *

*Important: If you’re solely going to improve the rear bar (and never the entrance), Addco recommends utilizing half # 634 (7/8″). Some house owners have discovered utilizing a 1″ Addco rear sway bar with a inventory entrance sway bar causes the WJ to oversteer.

Front: Addco p/n 175 (1.25″)Link arm washers1-1/4″ washer with 3/4″ inside diameterUpdate: Some house owners have reported that the washers weren’t wanted.Rear: 1 required for both sides, might require two per aspect if the washers are skinny. Washers needs to be of anti-rust materials or may also be painted.Front: none required

Optional greasable bushings

(manufactured by Energy Suspension)
Energy Suspension greasable bushings (with clamps)
Performance Polyurethane. Highly really helpful improve from the Addco customary urethane bushings. Unique channel design and zerk fittings, permitting grease to move to the interior bushing surfaces which prevents squeaking.Rear 1″:   Energy Suspension p/n 9.5161GRear 7/8″:  Energy Suspension p/n 9.5158R
Front: N/A

(It’s potential to make the Addco entrance bushings greaseable by drilling and tapping the inventory metallic bushing shells and including grease fittings. You then drill a corresponding gap by the bushing for the grease to move by)


Factory OEM sway bar alternative elements

Part Rear P/N Front P/N
Bar, sway 52088661 (1999)outdated by

52088739AD (1999-2004)

52088281 (1999-2003)
(Vehicles Built Before Nov 07, 2002)
Note: 31.5mm diameter hole52088281AB (2003-2004)
(Vehicles Built after Nov 07, 2002)
Note: 30mm diameter stable metal (working change close to the tip of the shortened 2003 mannequin yr)The revised 30mm stable metal sway bar with bushings will immediately swap/bolt up on 1999-2003 fashions that got here with the 31.5mm hole bar. WJ house owners who’ve retrofitted 1999-2003 fashions with the stiffer 2004 bar report a noticeable enchancment.
Clamp, bushing (x2) 52087865AB (1999-2004)(2x bolt p/n 6503571) 52088285 (1999-2004)(2x bolt p/n 6502936)
Bushing (x2) 52088322  (1999)outdated by

52088738AD (1999-2004)

52088284AD (1999-2003)
(Vehicles Built Before Nov 07, 2002)
31.5mm diameter52088284AE (2003-2004)
30mm diameter
(Vehicles Built after Nov 07, 2002)
Link arm (x2) 52088319AB  (1999-2004)(higher bolt p/n 6502473)

(decrease bolt p/n 6503726)

52088283 (1999-2004)(higher bolt p/n 6505353AA)

(higher nut p/n 6502697)

(decrease bolt p/n 6502473)

Bracket, hyperlink (x1) 52088525AC (1999-2004)(bolt p/n 6503571) ——–
Suspension Squeak/Squawk – Front Stabilizer Bar Bushings – A TSB was issued for this symptom in May of 2004, cowl all Grand Cherokee WJ fashions 1999-2004. Here is a hyperlink to a PDF copy of the bulletin: TSB 02-002-04 REV. A
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Fuel tank skid plate interference

UPDATE: As of round November 2003, Addco has launched a newly designed rear sway bar for the WJ that eliminates the issue of the bar banging into the gasoline tank skid plate. Early reviews from a number of folks that have put in the brand new bar report that the redesign does certainly resolve the issue.

On a small share WJ’s which have the manufacturing facility gasoline tank skid plate, the Addco bar suits so near the plate that the bar will ‘clunk’ towards it whereas going over bumps. This appears to be extra of an issue on 2002 and later Grand Cherokees maybe attributable to car part variances.

In order to try to resolve the clunking downside, I purchased some 1″ inside diameter gentle clear hose and put a chunk on both sides of the bar the place it was making contact with the skid plate. I lower the hose items all the best way throughout horizontally to suit them round both sides of the bar after which held them in place with zip ties. The first time I attempted it the banging noise was gone but it surely squeaked annoyingly (gentle plastic towards metallic). So I added a tiny little bit of grease on every hose to make it “slippery” and viola! All is quiet and no banging noises. However, the disadvantage is that the plastic hoses should be “re-greased” typically so this will not be such an awesome answer in any case. Now {that a} redesigned bar has been launched by Addco, the most effective “answer” is to purchase the brand new bar.

Detail displaying set up and site of rubber hose onto sway bar

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