Drivers side rear end sagging

Thread Tools
 
Search this Thread
 
Old July 12th, 2009 | 05:32 PM
  #1  
case2273's Avatar
Thread Starter
Registered User
 
Joined: Jun 2008
Posts: 16
Drivers side rear end sagging

71 cutlass convertible, frame on restoration, front end completely redone. Have not put it on the road yet. My drivers side rear end and front end appear to be lower than the passenger. No frame damage, southwest car, no rust. Why is it this way?
Old July 12th, 2009 | 05:37 PM
  #2  
Nilsson's Avatar
Registered User
 
Joined: Feb 2009
Posts: 1,076
From: Columbus, OH
Have you replaced the coil springs on all four corners? If not I suggest doing so and if you have recheck your installation.
Old July 12th, 2009 | 05:54 PM
  #3  
Lady72nRob71's Avatar
Registered User
 
Joined: Feb 2008
Posts: 11,798
From: Plano, TX
Coils springs tend to sag over time and weight, just like springs in mattresses. The weakest one will show a sag first.

My 72 vert has a slight list to starboard. Looking under it, I saw the rubber spring insulator at the top of the spring is half missing. The whole rear suspension will be replaced soon.
Old July 13th, 2009 | 07:33 AM
  #4  
joe_padavano's Avatar
Old(s) Fart
 
Joined: Mar 2007
Posts: 48,377
From: Northern VA
When you torqued the suspension bolts, was the weight of the car on the wheels? If not, the rubber suspension bushings can be "locked in" at the wrong suspension height, leading to ride height problems. On the other hand, if these are the original springs, it may be time to replace them.
Old July 13th, 2009 | 07:45 AM
  #5  
wmachine's Avatar
Trying to remember member
 
Joined: Oct 2005
Posts: 4,112
From: Ohio
I was going to say that I have that same problem, but then I saw that you are talking about your car.......
Old July 13th, 2009 | 09:20 AM
  #6  
citcapp's Avatar
Registered User
 
Joined: Nov 2007
Posts: 9,127
From: Rathdrum, Idano
Originally Posted by wmachine
I was going to say that I have that same problem, but then I saw that you are talking about your car.......
HA ha ha ha ha ha ha made my day
Old July 13th, 2009 | 12:26 PM
  #7  
case2273's Avatar
Thread Starter
Registered User
 
Joined: Jun 2008
Posts: 16
I have not torqued everything down yet because I noticed the stance problem. I have about 2 inches difference in the rear and about an inch in the front. Both on the drivers side.
Old July 13th, 2009 | 01:06 PM
  #8  
Nilsson's Avatar
Registered User
 
Joined: Feb 2009
Posts: 1,076
From: Columbus, OH
Originally Posted by case2273
I have not torqued everything down yet because I noticed the stance problem. I have about 2 inches difference in the rear and about an inch in the front. Both on the drivers side.
That's messed up, was it like this before you rebuilt the front end? Might be able to help if you were more specific as to what you replaced and did not replace.
Old July 13th, 2009 | 02:10 PM
  #9  
72 cutlass455's Avatar
Registered User
 
Joined: May 2009
Posts: 682
From: Colton Ca
Check the shocks I had a set of Air shocks that fully extended the passenger side rod in the shock then seize up found this out after replacing the old springs with new ones.
Old July 13th, 2009 | 08:42 PM
  #10  
Yellowstatue's Avatar
Registered User
 
Joined: Jan 2009
Posts: 4,087
From: Too close to Toronto!!
Smile Speedy

Sounds like your car is set up for oval track racing
Old July 14th, 2009 | 12:54 AM
  #11  
Rdrokit's Avatar
Registered User
 
Joined: Apr 2009
Posts: 360
From: Korat, Thailand
Wow that is weird. Usually if say the front passenger side spring was bad that side would sag and on the rear it would bring up the divers side,like a fulcrum. BUT if you had larger diameter tires on the rear and then when you reinstalled them you put them both rear tires on the front & rear of the passenger side then the passenger side would be higher. Did you replace the springs on the front or all four corners?
Old July 14th, 2009 | 12:02 PM
  #12  
case2273's Avatar
Thread Starter
Registered User
 
Joined: Jun 2008
Posts: 16
I replaced everything rubber related on the front end before I dropped in the 350. The fenders bumpers and such are off the car. Just the frame, motor, body and such together. My garage floor is dead flat and I measured the frame with a tape and a level while lifted and stands adjusted and set in the same place. Tires are all good, rear end is level. No shocks on the front yet. Springs were set in correctly. Have not done the rear suspension yet. Noticed this first and decided to analize first. Rear shocks are not air and move freely.
Old July 15th, 2009 | 12:21 AM
  #13  
Rdrokit's Avatar
Registered User
 
Joined: Apr 2009
Posts: 360
From: Korat, Thailand
Originally Posted by case2273
I replaced everything rubber related on the front end before I dropped in the 350. The fenders bumpers and such are off the car. Just the frame, motor, body and such together. My garage floor is dead flat and I measured the frame with a tape and a level while lifted and stands adjusted and set in the same place. Tires are all good, rear end is level. No shocks on the front yet. Springs were set in correctly. Have not done the rear suspension yet. Noticed this first and decided to analize first. Rear shocks are not air and move freely.
You lost me there, sounds like the car is on jack stands
Old July 15th, 2009 | 01:53 PM
  #14  
case2273's Avatar
Thread Starter
Registered User
 
Joined: Jun 2008
Posts: 16
car was on jackstands to take weight off of the springs to check and see if frame was twisted. Front end was not on so I could at least verify the front of the frame was true in various spots. If it is easy to take out the rear springs I am going to try and swap sides and see what happens. I have taken measurements with the car up and the car down. Sagging is definitely happening when a load on it.
Old July 15th, 2009 | 02:43 PM
  #15  
72 cutlass455's Avatar
Registered User
 
Joined: May 2009
Posts: 682
From: Colton Ca
I done the rear of my 72 cutlass in about a hour i used spring compressors for safety sake.
Old July 15th, 2009 | 02:52 PM
  #16  
oldsonharmont's Avatar
Registered User
 
Joined: Nov 2008
Posts: 662
From: Glendale, AZ
When I had the suspension checked on my 71 cutlass convertible, there was a slight difference in ride height. My shop suggested a 1/2" spacer on the bad spring. I haven't tried it yet, but it could be a low cost fix for yours.
Old July 16th, 2009 | 02:02 PM
  #17  
case2273's Avatar
Thread Starter
Registered User
 
Joined: Jun 2008
Posts: 16
I have those but 2-1/2" is a bit much. Even the top isolation pad is only about 1/2". I am going to check the springs for cracks.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
davoaz
Chassis/Body/Frame
4
July 20th, 2014 06:29 AM
brown7373
Parts Wanted
1
April 21st, 2012 12:49 PM
projectheaven
Suspension & Handling
8
January 4th, 2012 09:32 PM
pakrat
Body work
13
July 11th, 2009 10:20 PM
Willidog
Chassis/Body/Frame
7
March 29th, 2009 11:41 PM



Quick Reply: Drivers side rear end sagging



All times are GMT -7. The time now is 03:15 AM.