Sagging arse end. '85 90 SW - Defender Source
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  #1  
Old August 1st, 2014, 12:24 PM
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Sagging arse end. '85 90 SW

All:

I recently replaced all four shocks/springs, but the arse end is still a tad lower than the front. It also feels 'soft' back there when I drive. I fear this will be much worse when I have 4 people or even just my hounds back there. As I see it, I have the following options;

1. Install RN 1" (25mm) spacers in the rear.
2. Install RN 2" spacers in the rear.
3. Put taller springs in the back.
4. Put stiffer springs in the back.

I am concerned that a 1" lift will level the rig when it's unladen, but the sagging will return whilst laden. I am also concerned that a 2" lift will affect the handling when it's unladen. New springs are an easy swap but will cost the most $$.

Yes, the new springs are in the correct places (colour coded paint marks, verified with RN).

The other option is to lower the front, but I'm not big on that idea since changing the fronts is a PITA.

Thoughts?

Thanks,

Paul.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #2  
Old August 1st, 2014, 12:40 PM
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shouldn't be that way, the engine should really be enough to bring the fronts down.

Not sure if the springs are marked front and back (though I know they are left and right to compensate for the driver in the vehicle). I would include what you replaced the springs/chocks with so we have some idea of the recent replacement.


I would also check the shock mounts to see if they are in the correct place, the correct vintage or are some hobbled together solution for your truck, then I would check the spring mounts on the frame to see if they have been compromised (on my truck they had rusted out and were allowing the springs to push against the rear tub)

last but not least check the bump stops

Thats all I can think of for now
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  #3  
Old August 1st, 2014, 12:56 PM
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Quote:
Originally Posted by Jtomchik View Post
shouldn't be that way, the engine should really be enough to bring the fronts down.

Not sure if the springs are marked front and back (though I know they are left and right to compensate for the driver in the vehicle). I would include what you replaced the springs/chocks with so we have some idea of the recent replacement.


I would also check the shock mounts to see if they are in the correct place, the correct vintage or are some hobbled together solution for your truck, then I would check the spring mounts on the frame to see if they have been compromised (on my truck they had rusted out and were allowing the springs to push against the rear tub)

last but not least check the bump stops

Thats all I can think of for now
Springs are marked for all four corners, and they're all in the right place. I put OEM springs under there, with Pro-comp shocks, all from RN. Everything seems to be in the right place, it has the original chassis with no mods that I can see. Bump stops are there.

I'll call RN & see what they say.

Thanks,

Paul.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #4  
Old August 1st, 2014, 01:59 PM
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Just checking, but when you install, the heavier springs go in back and the lighter ones go in front.
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  #5  
Old August 1st, 2014, 02:05 PM
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Quote:
Originally Posted by evilfij View Post
Just checking, but when you install, the heavier springs go in back and the lighter ones go in front.
I can't tell which is heavier now, but the paint marks are where they should be!
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #6  
Old August 6th, 2014, 03:51 PM
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Update:

RN is going to send me a pair of rear Discovery springs and some kind of rubber dibbles for a tad more lift. These springs are taller & stiffer, apparently. I'll post results when I install them.

FWIW, I just drove across town with a set of 4 Freestyles and a set of 4 235/85/16 BF Goodrich tyres in the back. Back end was way down. Not a good look...

Thanks,

Paul.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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Old August 6th, 2014, 04:03 PM
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Airbags inside the rear coils. Best solution in my opinion. You adjust stiffness with load. They only cost around $100.
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Old August 6th, 2014, 04:35 PM
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Quote:
Originally Posted by Paul K View Post
All:

I recently replaced all four shocks/springs, but the arse end is still a tad lower than the front. It also feels 'soft' back there when I drive. I fear this will be much worse when I have 4 people or even just my hounds back there. As I see it, I have the following options;

1. Install RN 1" (25mm) spacers in the rear.
2. Install RN 2" spacers in the rear.
3. Put taller springs in the back.
4. Put stiffer springs in the back.

I am concerned that a 1" lift will level the rig when it's unladen, but the sagging will return whilst laden. I am also concerned that a 2" lift will affect the handling when it's unladen. New springs are an easy swap but will cost the most $$.

Yes, the new springs are in the correct places (colour coded paint marks, verified with RN).

The other option is to lower the front, but I'm not big on that idea since changing the fronts is a PITA.

Thoughts?

Thanks,

Paul.
Ronnie also had this issue ... pretty sure his was too much lift at the front.

I wonder if the springs are later models that are matched to different shocks on puma's for a smoother ride?
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  #9  
Old August 6th, 2014, 04:38 PM
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Quote:
Originally Posted by Paul K View Post
All:

I recently replaced all four shocks/springs, but the arse end is still a tad lower than the front. It also feels 'soft' back there when I drive.
Paul.
With what springs?
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  #10  
Old August 6th, 2014, 07:54 PM
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Paul Kennington
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Quote:
Originally Posted by Mybluett View Post
With what springs?
OEM Standard duty springs for a 90!

See you at the ABFM, Brian?
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #11  
Old August 6th, 2014, 07:57 PM
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Quote:
Originally Posted by Paul K View Post
OEM Standard duty springs for a 90!

See you at the ABFM, Brian?
Did you mount the front springs in the back and the back in the front?

We will have our booth setup again at ABFM, looking forward to seeing you again!
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  #12  
Old August 6th, 2014, 08:03 PM
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Quote:
Originally Posted by Mybluett View Post
Did you mount the front springs in the back and the back in the front?

We will have our booth setup again at ABFM, looking forward to seeing you again!
I suspect so, but the paint marks all said the springs were in the right places. I suspect they may have been incorrectly marked?

I'll be at the ABFM. I entered the rig. I need to order a roof rack from you as soon as I get the new engine & A/C fitted!
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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