Toyota 2nd Gen 4Runner Coil Spring Spacers and Panhard Drop Bracket

4Crawler Offroad Products

Coil Spring Spacers and Panhard Rod Drop Bracket

For 1990-1995 (2nd gen.) 4Runner/Hilux Surf and 1996+ non-US Hilux Surf models

Contents:

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Introduction:

1.5" Lift Coil Spring Spacers are now available from 4Crawler Offroad Products! Some of the photos below may still be of our old 2" spacers which are no longer available. The 1.5" spacer looks very similar, just the height is different. They measure ~2-1/4" tall with a 3/4" deep recess that locates the top end of the coil spring.

'90-95 Coil Spring Spacers/Panhard
'90-95 4Runner Coil Spacers
and Panhard Drop Bracket		 A Coil Spacer Installed

They are a good match in height when used in conjunction with the 1.5" ball joint spacers up front. Or by themselves, these spacers are just the ticket to counteract the classic rear end sag common on the 2nd generation 4Runner (1990-1995). The coil spring spacers only provide lift for the rear end of your 4Runner.

The spacers are designed to slip in on top of the stock rear coil spring. Made of resilient polyurethane, they should give many years of trouble-free and noise-free use. The inside of the spacer is designed to slip over the upper coil spring seat on the frame and then provides a new seat for the spring to rest on. The inner lip helps keep the coil spring centered on the spacer. The groove in the spacer is 5.25" (130mm) inner diameter and 6.625" (170mm) outer diameter, sized to fit the OEM 4Runner coil springs. If your springs are larger outside diameter, you may need to modify the spacer by trimming off the outer lip, easily done with a serrated knife lubricated with water or thin oil like WD40.

Coil spacers are an effective, low cost choice for leveling the rear end sag on the 2nd generation 4Runner. This is if you are otherwise happy with the rear springs, aside from their lack of height. If you find the rear coils are worn out and just too soft, then the spacer is probably not the best choice, since it will do nothing to stiffen up worn out coil springs. In that case. a set of heavy duty or lift coil springs would be a wise investment.

Will anything else in the rear suspension need to be changed after adding the coil spacers or installing new (or used) coil springs? Well as always, the answer is "it depends". If you have a typical 2nd gen 4Runner with 30+ year old stock springs that are sagging from their original ride height, then adding the coil spacers will essentially just get you back to stock ride height. As such, it is unlikely that you'll need to change much of anything in back. However, if you have recently replaced the springs, either stock height or lifted, then yes, you may need to change some things in back to account for the lift. How to tell what may be needed? Grab a tape measure and start checking things. For the shocks, you can jack up the rear end to let the tires hang freely and measure the extended shock length. Then unbolt the bottom of the shock and see if it can extend any farther and if so by how much. If it can extend about 1.5", then it'll be fine with the spacers, if not, you may need a longer shock. On the panhard rod, measure the height of the bolts at each end of the rod and if those are not close to the same, you may need to install a panhard drop bracket along with the coil spacers.

f you notice your rear brakes are a little weak, you may need to adjust the sensing rod on the Load Sensing / Proportioning Valve (LSPV) on the inside of the passenger side frame rail. For small adjustments, you can use the adjusting nuts on the rod end, otherwise, an LSPV bracket may be needed.

For more information, feel free to contact 4Crawler Offroad.

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On-line Ordering:

2nd generation 4Runner coil spring spacers are available below:

'90-95 Coil Spring Spacers '90-95 Coil Spring Spacers '90-95 Coil Spring Spacers
Quantity:

Quantity:

Quantity:

1 Pair 1.5"/38mm Coil Spring Spacers,
US Delivery
Panhard bracket not included with the spacers		 1 Pair 1.5"/38mm Coil Spring Spacers,
Canada delivery
Panhard bracket not included with the spacers		 1 Pair 1.5"/38mm Coil Spring Spacers,
International Delivery
Panhard bracket not included with the spacers
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Coil Spring and Ball Joint Spacer kit Coil Spring and Ball Joint Spacer kit Coil Spring and Ball Joint Spacer kit
Quantity:

Quantity:

Quantity:

1 Pair 1.5"/38mm Coil Spring Spacers and
1 Pair 1.5"/38mm Ball Joint Spacers; US Delivery		 1 Pair 1.5"/38mm Coil Spring Spacers and
1 Pair 1.5"/38mm Ball Joint Spacers; Canada Delivery		 1 Pr. 1.5"/38mm Coil Spring Spacers +
1 Pr. 1.5"/38mm Ball Joint Spacers;
International Delivery

Be sure to to bookmark, download or print out a copy of the installation instructions below. Printed instructions are not included with the spacers.

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Installation Notes:

Replacing the rear coil springs on a 4runner is relatively easy. The short step by step is:

  • Lift the back end of the truck and support the frame on jack stands
  • Remove rear tires
  • Note that you may need to remove the tires then lower the frame onto jack stands if the stands are too short to reach w/ the tires on.
  • Disconnect sway bar and shocks from axle
  • You may also need to disconnect the panhard bar if you can't get enough down travel to fit the spacers in place.
  • Press down on the now free-hanging axle and swap the springs
  • You can remove the stock rubber spring isolator as the coil spacers serve the same purpose, or you can leave it in place as you prefer.
  • Note on some aftermarket springs, the top of the coil may not have a flattened/tapered end like the stock coils do and thus may not sit flat against the spacer. If this is the case, you can use an angle grinder to slightly flatten the projecting end of the spring to fit better. The spacers themselves are a compliant poly urethane material and will accommodate some unevenness on the top end of the spring.
  • If you are going from stock height springs to any lift, you may need to replace the rear axle brake line with a longer one
  • Reinstall the disconnected parts to complete the installation.
  • If you had to remove the panhard bar and need to re-install it, you may need to add some weight to the passenger side (have a few friends stand on that side of the tailgate) or use a bottle or floor jack under the passenger side of the axle to lift it a little to allow the panhard mounting bolts to be reattached.
  • If you find the two ends of the panhard bar are more than a few inches different in height, you may need a panhard drop bracket...
  • Check all fasteners in 100-200 miles to make sure they have not loosened
  • If you hear a clunking noise under braking/accelerating, you may want to double check your factory bottle jack, especially if it was used in the installation. It may not have been replaced tight enough and is making that noise.
  • The rear brake Load Sensing Proportioning Valve (LSPV) sensing arm should be adjusted to compensate for the lift achieved.
  • The sensing rod bolts to the axle and uses ride height to adjust rear brake pressure.
  • If the LSPV adjusting bracket was purchased with the spacers, un-bolt the sensing rod from the axle, bolt in the LSPV adjusting bracket with the stock bolts.
  • Then bolt the sensing rod to the top of the bracket with the supplied bolts.
  • Check for proper brake operation and fine tune the sensing rod as needed:
  • Movement of the sensing rod upward at the LSPV = more rear braking, lowering it = less rear braking.

    • By jamming a piece of wood (2x4 or similar) between the brake drum and the wheel well, the axle should be low enough to work on the springs. The only tricky part of this, if using the spacers with lift springs is getting the springs compressed a couple of inches, as the spring compressors are difficult to work with in this confined area.

    Here is a write-up on the installation process with additional photos and tips:

    With variations in rear suspensions, you might find that the rear springs might pull away from the coil spacer under full spring droop. If this happens there are several options available. One option is to install some limiting straps on the rear axle to keep it from dropping low enough to take the tension off the springs. Straps are available from many off-road parts shops. Another option is to ensure your rear shocks are not too long. By design, the rear shocks are supposed to just limit the suspension down travel to prevent the coil spring from falling out.

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    Panhard Drop Bracket for 1990-1995 (2nd gen.) Toyota 4Runner/Hilux Surf:

    YouTube video on how the panhard brackets are made:
    https://youtu.be/N0w3Bgzg2nY

    The panhard rod drop bracket lowers the frame end of the panhard rod to compensate for the rear end lift. The panhard rod helps to locate the rear axle side to side and if not adjusted for the lift, it will tend to pull the axle towards the right side due to its higher angle from the frame to the axle bracket. Don't just go by the lift height on the box your springs came in. The best way to check the offset on the panhard rod is to use a tape measure and measure the height off the ground of the center of the mounting bolt on each end of the rod. The height difference between the two ends would be amount of drop your rod needs to be restored to level. Note that it is not critical to match that height difference exactly. For example, if you have recently installed new springs, you might want to allow for a little spring settling over time, so if you measure a 5" panhard end height difference, a 4" bracket may be just about right when the new springs settle an inch or so as all springs will do in time. See the image below for a view of what all this looks like:

    Panhard Rod Overview
    Panhard Rod Overview

    In the above image, you can see how the rear end of the suspension should look like. The light blue line is horizontal and it lines up with the panhard rod showing that it is close to level. To ensure it is level, simply measure the height of the two ends of the rod from the ground (shown with the green and red arrows in the above photo). If the left and right side heights are the same, then the bar is level. If they are not equal, then the difference is the height of the panhard drop bracket required to restore the rod to horizontal. If you can look closely in the above image, you can see this 4Runner has a 4" panhard drop bracket installed and it also has 3" lift coil springs installed. This just goes to show it is better to measure the height of bracket you need than to just go with the advertised lift of the springs. This page has a good description of the Panhard Rod Geometry. about half-way down the article. And as quoted in this article from suspension designer John Hotchkis. And here's a short YouTube video on the same subject.

    "The Panhard Rod should be as long as possible and be mounted horizontal at static ride height. An angled Panhard Rod will cause the suspension to move side to side during suspension travel."

    Note that if you search the web for Panhard Rod geometry, you will find references to angled Panhard Rods, however, these are typically found on circle track race cars where you can adjust angle and location of the Panhard Rod in order to improve tire bite in one turn direction. While this works fine on a dedicated race vehicle, for an on-the-road type vehicle, it is probably more important to have equal handling in both left and right hand turns.

    If you want to calculate what sort of affect a given panhard bar drop bracket (or lack thereof) will have on your rear suspension and axle location, you can try the link below:

    Here's a really handy Java applet for calculating triangles side lengths and angles.

    Simply choose the "2 sides and non-included angle" triangle calculator and enter two of the side lengths and one angle and it will figure out the length of the 3rd side for you (where was this tool in that high school geometry class?). So what measurements do you enter? Well, one is the length of the panhard bar, which is approx. 37" long, center to center, enter that number as the "side AC" length. Then for "side AB and AD", enter the difference in height of the two ends of the panhard bar that you measured on your truck. For example, lets say you measured 5" difference. Then the angle is easy, for a right triangle, that angle is 90°, so enter 90 in the "angle ACB" box and hit enter. There are two pieces of information to take out of the results, one is the "side CD" length, in this example it is 36.6". What this tells you is that the horizontal separation of the two ends of the panhard bar is 36.6". Now if the panhard bar were perfectly horizontal, then those two points would of course be 37" apart (i.e the same as the panhard bar is long). Since the frame end of the bar can't move, that means the axle has been pulled ~0.4" (37 - 36.6) towards the passenger side. And realize that the driver's side of the axle is pulled inward by that same amount so you'll see the rear tires offset by twice that amount; that is, the driver's side will be closer to the body by ~0.4" and the passenger side farther away from the body by ~0.4" so you'll see a difference side-side of nearly 0.8". The other item of note is the "angle ABC" that is about 7.7°. This is the angle that the panhard bar is currently sitting at. Ideally it should be around 0° if it were horizontal. So, given the setup in this example, if a 4" drop bracket were added to the passenger side of the frame, the current 5" difference would be reduced to 1" (5" - 4" = 1") and plugging that new number (1") into the "side AC" box, you'll find that the panhard angle has dropped to 1.5° and the offset of the axle is now about 0.02" (nearly 0) which is probably what you are looking to do. Your numbers will most likely be different, but you get the idea. And the main point to take away is that you only need to get the size of the drop bracket within an inch or so of the actual offset, since the panhard bar will be "close enough" with an inch or so of offset side-side. So don't worry about trying to get your measurements to some ridiculous degree of accuracy, getting within and inch or two is fine. It is not like there are any "panhard bar police" that will pull you over for a spot check!

    Notes:

    Panhard Rod Bracket Panhard drop bracket installed
    Panhard Rod Drop Bracket Panhard Drop Bracket and LSPV Installed

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    On-line Ordering:

    4Crawler Offroad is no longer making these panhard drop brackets.