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Standard and Adjustable Drop Link Replacement
 
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Pelican Technical Article:

Standard and Adjustable Drop Link Replacement

Time:

2 hours2 hrs

Tab:

$75 to $125

Talent:

**

Tools:

19mm, 17mm wrench, 19mm socket, breaker bar

Applicable Models:

 
Porsche 911 (1965-74)
Porsche 911 Carrera (1974-89)
Porsche 911E (1969-73)
Porsche 911L (1968)
Porsche 911S (1967-77)
Porsche 911SC (1978-83)
Porsche 911T (1969-73)
Porsche 930 Turbo (1976-77, 1986-89)
Porsche 964 Carrera 4 (1989)

Parts Required:

New drop links

Hot Tip:

Make sure your sway bar can move

Performance Gain:

Better handling

Complementary Modification:

Replace suspension bushings

The sway bars on your car connect the two front wheels or the two back wheels and help reduce body roll. Porsches came with two types of sway bars: through the body and bars mounted below the body. This article will show examples on a stock rear lower body bar. While the bars may differ, the drop links and principles behind them are similar.

In this article we will go over replacing your stock drop links with original equipment as well as installing aftermarket adjustable links.

If your car is starting to feel "loose" or wandering over uneven surfaces that is the first sign that your drop links are starting to go bad.

Begin by safely raising and supporting the vehicle. Please see our article on safely raising and supporting your car. Any time you work under your car wear safety glasses.

This photo illustrates how the drop link (red arrow) attaches the banana arm (green arrow) to the sway bar (yellow arrow).
Figure 1

This photo illustrates how the drop link (red arrow) attaches the banana arm (green arrow) to the sway bar (yellow arrow).

The factory drop links have two hard rubber bushings where the link connects to the sway bar and banana arm (red arrows).
Figure 2

The factory drop links have two hard rubber bushings where the link connects to the sway bar and banana arm (red arrows).

Inspect the links for any deterioration in the rubber, excessive play or damage.
Figure 3

Inspect the links for any deterioration in the rubber, excessive play or damage. These bushings are shot and should have been replaced a long time ago (red arrow).

Use a 19mm wrench or socket and remove the bolts holding the drop links (red arrows).
Figure 4

Use a 19mm wrench or socket and remove the bolts holding the drop links (red arrows). On the bolt for the sway bar you will need to support the bolt with one wrench and remove the nut with another. If the links are old there is a good chance you will need to use a breaker bar to get the bolts to break loose. Once the links are removed make sure you can move the sway bar in its mount. The bar should be stiff but not impossible to rotate. If the bar is frozen in the mount remove it and lubricate or replace the mount bushings.

This photo illustrates the difference between the stock link (red arrow) and the Tarett adjustable drop link (yellow arrow).
Figure 5

This photo illustrates the difference between the stock link (red arrow) and the Tarett adjustable drop link (yellow arrow). The main difference and benefit on the adjustable link is the ability to eliminate the preload from the sway bar. Sway bars are designed to place equal pressure on each wheel. With equal tension on the bar you get an equal and progressive effect on the sway bar when turning either direction. While the factory bar allows this when the car is unloaded, as soon as the driver sits in the car the sway bar is preloaded to one side, affecting its performance unevenly. By being able to adjust the drop link you can either have the driver sit in the car or place the approximate weight of the driver in the seat and then set the drop link. This allows the bar to be balanced or unstressed with a driver in the car rather than when empty. While you may not notice this in everyday street driving, as your skills improve or you start taking your car to the track the difference can be remarkable.

Installing the stock mount is as easy as installing the bolt to the banana arm (red arrow) and lifting the sway bar until the hole in the sway bar lines up with the drop link.
Figure 6

Installing the stock mount is as easy as installing the bolt to the banana arm (red arrow) and lifting the sway bar until the hole in the sway bar lines up with the drop link. Insert the new hardware and torque to spec. Note the factory uses single use stretch nuts and these should be replaced after every use.

The Tarett adjustable drop link we are using has the ability to be attached to the swing arm or the banana arm.
Figure 7

The Tarett adjustable drop link we are using has the ability to be attached to the swing arm or the banana arm. When installing in the swing arm the included eccentric nut/spacer will replace the eccentric nut in the swing arm. This nut is used to set the toe adjustment in the rear suspension. Installing the drop link in the swing arm will give the sway bar a little softer feel. Also, if you install it in the swing arm you should get the alignment checked after installation to insure proper toe in. Follow these steps for adjusting preload after installing in the swing arm.

Install the drop link on one side of the sway bar only to start.
Figure 8

Install the drop link on one side of the sway bar only to start. Attach the female end to the banana arm and finger-tighten (red arrow). When attaching the Tarett adjustable drop link into the banana arm you must use the eccentric nut/spacer as a spacer between the link and arm. Raise the sway bar until its level with the hemispherical joint on the link and attach the lower hardware (yellow arrow).

Make sure to insert a washer between the sway bar and joint and between the joint and lock washer (red arrows).
Figure 9

Make sure to insert a washer between the sway bar and joint and between the joint and lock washer (red arrows). The Tarett kit also comes with a Nylex locking nut (yellow arrow).

Install the female end of the drop link to the opposite banana arm in the same manner as explained previously.
Figure 10

Install the female end of the drop link to the opposite banana arm in the same manner as explained previously. Lower the car to the ground. Loosen the locking nut (red arrow) on the male end of the link. Have the driver sit in the driver's seat or place the appropriate amount of weight in the seat. Reach under the car and adjust the drop link until the lower hemispherical joint lines up with the hole in the sway arm and install the mounting hardware. Next torque all the hardware to spec. Congratulations! You have just eliminated the pre-load on your sway bar, now get that car to the track.

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Comments and Suggestions:
OZ930 Comments: I have checked the invoice and the part numbers are:
93033307100-EUR
93033307200-EUR

I have now installed the other style drop link, as in fig 1 and 2, which have part numbers:
93033307100
93033307200
I compared these parts and there appeared to be about 5mm difference from eye to eye, the fig 1&2 being longer.
November 6, 2015
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
OZ930 Comments: The drop links in figure 1 and 2 are different to the new style of link in figures 5 and 6 which are more like a shock absorber type construction. I installed this new style and they pulled the rubber out of the eye. I am adding big washers on each side of the eye and reinstalling.
Anyone else had this issue ?
October 26, 2015
  Followup from the Pelican Staff: You may have installed the wrong part for your vehicle. Are the part numbers for your model? - Nick at Pelican Parts  
911SydneyAust Comments: Can anyone help me with the torque settings for a the 19mm attachment bolts on the drop links and b the bolts the attach the brackets that hold the rubber bushes in place?
My car is a 1983 911SC
Many thanks for any assistance.
July 2, 2015
  Followup from the Pelican Staff: We don't have the torque specs.


I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799.

I opened a post in our forums. A Pelican community member may be able to answer your question.
- Nick at Pelican Parts
 

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