Questions tagged [suspension]

Suspension is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels. -Wikipedia

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25
votes
7answers
266k views

Is it safe to drive a car that has a broken suspension spring?

Yesterday I was driving home from work and heard a loud noise which I can only really describe as a "clang". After looking at it today, it looks like the spring for the front left (passenger side) ...
15
votes
3answers
10k views

What are the Advantages of a Single Side SwingArm on Motorcycles?

I have noticed that Ducatis , Honda and Triumph have bikes with a Single Sided SwingArm Much like most of the scooters. Are there any advantages of following this design , if so why are not all ...
13
votes
2answers
1k views

Discovered disconnected part when removing wheels

I have a 2006 Honda Civic and was changing my summer tires for winter tires. When removing the wheels I noticed behind 2 of the 4 wheels that what is shown in the middle of this picture was ...
12
votes
3answers
1k views

Spring tensioner safety

I recently ordered this tool kit at an extremely reduced price. While I am confident about the general quality of those tools I am quite reserved about the spring tensioner included in the kit. In ...
12
votes
5answers
40k views

How to diagnose high speed vibration?

I get a vibration at high speeds (50+), can feel it particularly in the steering wheel, front seats, dashboard. I have been trying to figure out what's going on, keeping in mind that: All 4 shocks ...
11
votes
1answer
5k views

Motorcycle Speed Wobble - How do I figure out the problem?

I have a 2005 GSXR 600. I took it for a test drive and the head shakes around 65mph or so and then goes away when I go past that. It's worse when I'm slowing down without the front brake. When I ...
11
votes
2answers
4k views

Do I Need to Compress the Springs to Install Strut Tower Braces?

I have a '99 Maxima. I am considering installing strut tower braces. In order to do so, would I need to get spring compression tools to hold the springs on the struts, or will the weight of the car ...
11
votes
2answers
5k views

Reusing self locking nuts

I am in the progress of doing some work on the suspension. Can I reuse the nuts on the bolts holding critical parts (struts, tie rod, etc.) if I clean the threads and apply thread locker? My aim with ...
11
votes
3answers
32k views

What are the advantages of upside down forks?

Recently, I have come across many bikes which have upside down front forks. From browsing around the internet, I was not able to get a concrete answer for why it is preferred over conventional ...
11
votes
3answers
2k views

How Urgent is it to Replace Worn Out CV Boots

I recently noticed that what I think are the inner CV boots on my 99 Nissan Almera have started coming apart: They were still in one piece this past August when I took the car for inspection, so this ...
11
votes
2answers
13k views

How Important Are the Rear Shocks / Struts

When people talk about changing the shocks or struts, it's usually the front ones due to comfort, handling and safety reasons. But what about the rear ones? How much of a problem are worn out rear ...
11
votes
1answer
534 views

1968 Beetle Front Shocks (Koni)

What are the correct size Koni front shocks for a 1968 Beetle at stock height? I purchased the (red) Koni D 80-1787 which Koni's site recommended as a stock shock replacement. My mechanic says ...
10
votes
4answers
11k views

Effects of sway bar stiffness on rough, uneven roads

I just read a really nice write-up on sway bar physics. I also watched a video discussing suspension behavior on rough roads. Let's assume the following: A front-wheel drive vehicle being driven ...
10
votes
5answers
25k views

Is it better to drive across a speed bump at a right angle or slightly skewed?

I'm wondering if it is better for your suspension to drive across a speed bump at a right angle (so that the two front tires and the two rear tires hit the bump at the same time, respectively), or at ...
10
votes
3answers
2k views

How did luxury cars provide smoother rides without active suspensions?

It seems all luxury cars have active suspensions now, so it's not a fair comparison to "non-active" cars. But I was recently driving a mid-2000 Mercedes E-class over the same roads I normally travel ...
10
votes
2answers
2k views

What bolt is a replacement for the front sway bar bolts on a 2004 Subaru WRX wagon?

In replacing my worn endlinks recently with lovely Kartboy pieces, I noticed that I had a seized bolt in one of the rear links. I was able to get a short-term replacement until I order a new Kartboy ...
10
votes
2answers
16k views

Do I need to replace both front struts if one is OK

I have a car that is 7 years old and unfortunately hit a curb which bent the front strut on the drivers side. Do I need to replace both struts? Or just the damaged strut? It is similar to this ...
9
votes
3answers
1k views

How to demonstrate that rear shocks are failing?

I replaced the front shocks on a 2011 Toyota, but still getting excessive body roll. The extended warranty will cover rear shocks, but I have to somehow provide evidence that the rear shocks are ...
9
votes
3answers
629 views

Magnetic Active Suspension or Magnetorheological Damper

GM developed magnetic dampers for the Corvette several years back. What is magnetic active suspension and how does it work? I understand there is a magnetic fluid in the shocks but how, deep down, ...
8
votes
4answers
4k views

“Always Replace” (torque-to-yield) Bolts

I'm working on a VW Jetta and have pulled one of the suspension ball joints to replace a drive shaft. The three bolts holding the ball joint to the lower control arm are marked in the Bentley service ...
8
votes
2answers
2k views

Motorcycle chewing through too many front tyres

I have a Y2K Triumph Speed Triple that has an excessive appetite for front tyres. It eats two front tyres for each rear tyre. This is the reverse of what it should be. I run the tyres at about 38 PSI ...
8
votes
1answer
3k views

Ohlins Rear Motorcycle Shock - How do I setup, care for and tune it?

I have a 2005 GSXR 600 I'm getting on the road. I bought an Ohlins rear shock for it and ordered the spring to match my weight. I can't figure out the low/high speed or the rebound/compression ...
8
votes
1answer
2k views

How do I get the sway bar link to line up with new strut and spring?

I am swapping the struts and sway bar links on a 2006 Toyota Sienna AWD. I got the first strut in place and started to put the sway bar link on but it does not want to line up with the mounting hole ...
7
votes
3answers
2k views

Pros and cons lowering sedan?

Thanks to the community here I have successfully fixed my overheat problem, so I'm moving on to another problem...lowering the 95 camry. The method I'm planning on using to lower it is by adjusting ...
7
votes
4answers
3k views

Why do race cars need suspension?

Consider F1 or NASCAR race cars. From what I understand these cars are not subjected to undulating troubling roads that produce heavy pitching or bouncy motions. The tracks seem pretty levelled. As ...
7
votes
5answers
26k views

Car pulls to right when letting go of accelerator?

I'm driving an old Grand Voyager minivan temporarily, and notice that when I accelerate then let go of the accelerator, the car pulls slightly to the right, and I have to correct it by steering a ...
7
votes
3answers
49k views

If one coil spring needs replacing, do I need to replace both?

I just had my car serviced and they discovered that the front, near side coil spring is "incomplete" and needs replacing. I'm getting conflicting advice about whether I need to replace both front ...
7
votes
4answers
622 views

What is a shock absorber?

I was told that I need to replace the shock absorber in my 1992 316i BMW. When I attempt to visit a web site to order the part it does not list any of parts with this name. I know nothing about cars ...
7
votes
2answers
1k views

1988 Jeep Wrangler - How do I do a DIY alignment?

Have a friend with a '88 YJ. He wants us to tackle an alignment job on it. It's pulling to the right. We can see the rear axle is not aligned and tire rubs on one side. It looks like it might be ...
7
votes
3answers
25k views

How to reduce vehicle swaying (body sway)

I have a stock 2010 Acura TSX. I don't know what the official term is (maybe body sway) but I would like to reduce the amount of swaying it does as I'm going through turns, especially at higher speeds....
7
votes
2answers
2k views

2008 Jeep Wrangler - Suspension squeaks

The suspension on my 2008 Jeep Wrangler squeaks when I hit a low spot (maybe 4-6" from the grade), even at slow (<10 mph) speeds. Where can I lubricate or what should I check to eliminate this ...
7
votes
1answer
3k views

What makes a worn car shock spongy and soft?

I'm unfamiliar with car shocks. In motorcycles many rear shocks are charged with nitrogen which acts like a spring. I've seen motorcycle shocks that I've rebuilt have the correct amount of nitrogen ...
7
votes
2answers
2k views

Replacing only one front strut?

I drive a 2014 Corolla LE and recently had my right front shock strut and stabilizer bar link replaced under warranty. Currently the car has 20300 miles on it. Questions: Steering-weight seems ...
7
votes
1answer
7k views

How bad is this strut mount damage?

I noticed a crack in the strut mount rubber of my 1999 Volvo v40. The suspension often creaks when going over speed bumps (and sometimes it doesn't) though I'm not sure it's the fault of this mount. ...
7
votes
4answers
6k views

Alignment is out of spec a tad - should I worry?

So I bought new tires recently for my 2002 Nissan Sentra and wanted to make sure that my alignment would not eat them up. Even though effectively my entire suspension/axle system was overhauled ...
7
votes
4answers
18k views

Car pulls to the side when driving or braking on a bumpy road

I have a 2005 Honda Accord that pulls to the side when driving over bumps or hitting pot holes. Most of the time, it pulls to the left but occasionally to the right as well. This is most pronounced ...
7
votes
1answer
2k views

Alignment and Lower Control Arm Bushings

I replaced my struts, strut mounts and tie rod ends, then went and got an alignment before taking my car to it's inspection. At the inspection, they found that the nuts for the tie rod ends hadn't ...
7
votes
1answer
3k views

When installing air ride suspension how is pinion angle set on the axle?

Saw we had a Motor Vehicle Stack and I thought it would be fun asking some hot rod related questions. One issue I've always faced in building a hot rod truck is determining how the pinion angle ...
7
votes
2answers
85k views

Thumping/Knocking noise coming from the rear (suspension?)

As of lately my car started to make thumping/knocking sounds whilst driving over speed bumps (at regular speed) I drive a 2001 renault laguna 1.8 16v with about 218,000km (about 135500 miles) on the ...
7
votes
1answer
349 views

Displacement sensors for car wheel and datasheets

Probably title says it all, but I am on my design work for car suspension and cannot find a good displacement sensor for each of the wheels of the car. I tried to look up for accelerometers, which can ...
7
votes
1answer
138 views

Identifying Suspension Parts on my Mazda 626

This is a continuation of my question regarding What to Check When Replacing Struts, but specific to my 98 Mazda 626 2L. I want to make sure: I've correctly identified the parts What is their effect ...
7
votes
2answers
2k views

Slow speed crunch/pop sound?

Having this issue that started recently. Hearing and feeling in the steering wheel and pedals crunch/pop sound when rolling slowly. On/off brakes doesn't seem to matter. In gear/off gear doesn't ...
6
votes
3answers
1k views

Trying to figure out the name of this car part!

I got new tires today and saw that the part that's circled is broken on my car. It looks like it just snapped at the top because part of the bolt appears to still be in whatever the tube is. Anyone ...
6
votes
4answers
1k views

What tire size will provide a softer ride and less oversteer?

I am currently tasked with replacing the tires on my grandparents 07 Jeep Wrangler X with a 225/75/16. To preface this, it will never go offroad! My mom drives my grandma around on Sundays to the mall ...
6
votes
2answers
11k views

Do springs wear out?

I will be replacing the struts and shocks on my car soon. I did them last about 80000 km ago, but at that time I did not replace the springs. Do springs wear out over time? Should I replace them ...
6
votes
2answers
8k views

2001 Honda Civic: rough ride, even after new struts

My 2001 Honda Civic has what I can only describe as a "rough ride" in the front wheels. When I put my foot on the brake pedal (not pressing on it), there's a roughness there I can feel. It's less at ...
6
votes
1answer
441 views

Load on bed of pickup for extended period of time

I just got a Toyota Tacoma 2012 Sport long bed. I'm an artist and I make driftwood horse sculptures. I have two horses on the bed of the truck currently which comes to about 500 lbs. I intend to ...
6
votes
1answer
5k views

What is the difference between a knuckle and spindle?

Surprised I didn't see this asked before but when watching videos about suspension components and installs I've commonly seen people refer to, what I would imagine a spindle, but call it a knuckle. ...
6
votes
1answer
557 views

Why are shock absorbers in wishbone suspension systems mounted on the lower control arm?

Is there any particular reason (relating to the sprung mass) for having this kind of setup? I am yet to see a wishbone suspension with the shocks on the UCA.
6
votes
1answer
4k views

How can I increase the ride height of my vehicle?

2001 Buick Regal It already has a naturally low ride height, And I feel like I've lost some over the years. The suspension is stock with the exception of new shocks I installed about 6 months ago. ...