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What causes rear end sag?

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Old Mar 15, 2012 | 10:23 PM
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From: Medford Or
What causes rear end sag?

Driving around town I constantly see other 4runners With almost no rear end sag, it frusterates me because of how saggy mine is, what causes this rear end sag? Old warn out struts??? Warn out coils?? Other than coil spacers is there any other fix for this Problem?
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Old Mar 15, 2012 | 10:28 PM
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i think its just the coil springs wearing down over time, id just replace the coils instead of spacers
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Old Mar 15, 2012 | 10:40 PM
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Fat chicks
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Old Mar 15, 2012 | 10:42 PM
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Originally Posted by dropzone
Fat chicks
True story
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Old Mar 15, 2012 | 10:44 PM
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Originally Posted by dropzone
Fat chicks
I was going to say donuts but I guess you can't have one without the other.
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Old Mar 15, 2012 | 11:26 PM
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Seriously though, just 22 year old coils being compressed over time?
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Old Mar 16, 2012 | 02:03 AM
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In all honesty it is just coils compressing. 4Runners like many other SUV's have a lot more weight on the back than a regular pickup so they tend to sag much faster over time.
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Old Mar 16, 2012 | 03:18 AM
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Fat americans in trucks set up for skinny Japenese= coil fatigue
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Old Mar 16, 2012 | 03:40 AM
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Rear Springs is something that Toyota has never gotten right.
All Five of my trucks have had rear springs issues.
The rear springs in my Camry suck as did the springs in my '89 Tercel...
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Old Mar 16, 2012 | 02:56 PM
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From: norman, ok
This is good picture showing why alot of older vehicles have rear sag.



Name:  fatchick.jpg
Views: 1381
Size:  55.3 KB
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Old Mar 16, 2012 | 02:59 PM
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Well... think about it. New from the factory, these springs sat completely level. If any higher, it would look "raked" springs settle, so therefore, the factory springs, settled and ended up lower than they thought. My 4Runner never had sagging problems, but when i added a 200 lb bumper, & stereo. I added a coil spacer, and now it sits half an inch higher in the rear, even with that weight.
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Old Mar 16, 2012 | 03:37 PM
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pretty sure it is a phenomenon called creep, if you want to get all technical.

http://en.wikipedia.org/wiki/Creep_%28deformation%29
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Old Mar 16, 2012 | 03:59 PM
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From: UT
Originally Posted by dropzone
Fat chicks
Originally Posted by TICK2791
Fat americans in trucks set up for skinny Japenese= coil fatigue
Originally Posted by 94toy22re
This is good picture showing why alot of older vehicles have rear sag.
Haha, welcome to America!!

Yeah, coil fatigue. Those coils are old, and that is a lot of compressing over time! Everything wears out.

Last edited by 801YotaRunner; Mar 16, 2012 at 04:01 PM.
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Old Mar 16, 2012 | 04:46 PM
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From: Sierra Nevada"s, California
how is that bike not running a constant wheelie????
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Old Mar 16, 2012 | 05:43 PM
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From: Graham, WA
I wonder what kind of weight limit those tires have on them.

The last thing I would ever wanna do on a bike is put a big lady on the back and hit the highway going 70+ mph in a t-shirt and no helmet
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Old Mar 16, 2012 | 08:28 PM
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From: norman, ok
I think most sports bike have 350-380 weight limit, and that pool little cbr is pushing 450+.
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Old Mar 16, 2012 | 08:46 PM
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Originally Posted by MaK92-4RnR
Well... think about it. New from the factory, these springs sat completely level. If any higher, it would look "raked" springs settle, so therefore, the factory springs, settled and ended up lower than they thought. My 4Runner never had sagging problems, but when i added a 200 lb bumper, & stereo. I added a coil spacer, and now it sits half an inch higher in the rear, even with that weight.
Yes that and if you think about a new vehicle, take 100 typical test drives and think of what the results are if you have a nice "car-like" ride vs. a much firmer "truck-like" ride. I think 99 out of 100 would prefer the softer ride. And how many of those folks preferring the comfy ride are thinking what those soft springs will be like in 10 years.
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Old Nov 16, 2013 | 03:03 AM
  #18  
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From: Vancouver Island
Originally Posted by 94toy22re
This is good picture showing why alot of older vehicles have rear sag.



3 things wrong with this photo:
not wearing a helmet.
driving with one hand.
that bug deflector should bin in the front.
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Old Nov 16, 2013 | 05:52 AM
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From: Woodward, Oklahoma
Originally Posted by JohnnyCanuck
3 things wrong with this photo:
not wearing a helmet.
driving with one hand.
that bug deflector should bin in the front.
Fella haulin her around dont need a helmet, hes got nothin to live for.
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