I have a discovery 2 with ACE and rear air ride.

I added a 12,000 Harbor Freight winch with a 03-04 ARB bumper. Roof rack has about 100 lbs of gear. I purchased these springs https://www.britpart.com/all-parts/da4198 and these shocks https://www.lrparts.net/dc5000l-fron...scovery-2.html Both have a 2 inch lift. I also have 2 inch Toddco aluminum spacer lifts. My shop guy says the Rover is top heavy and swaying and ACE isn't doing it's job. Could someone mind chiming in? Also someone said "ultra heavy duty springs from a Discovery 1 are compatible in a Discovery 2":

 

Does anyone know if Discovery 1 heavy duty springs will fit on a Discovery 2 with ACE ?

 

You are overloaded for the springs, those only add 100 to 200 Lbs of extra weight.

You have 100Lbs on the rack + rack weight depending the rack that adds 75 to 100 + lbs The dynamic load roof load of a Disco 2 is 160 lbs tops, with a stock suspension so you are over.
Then you have the winch and bumper another 100.
You still have not added anything else

You need to do your suspension properly not toss parts at it.

Go back to the beginning

Determine your all weight truck scales are great for that, but I am going with you are at 300 to 400 over
Spring options are TerraFirma HD front and rear or OME HD front and rear,there are other but these are the easiest to start with.
Then you need shocks to with the springs - that just get weird with valve rates etc.
Check your sway bar bushings etc.

What you need to know is spring rate then load and it can be a bear to find

TerraFirma Springs

TF023V Medium Load Rear Specification: 300-340 lbf/in, free length driver's side 420mm, free length passenger's side 410mm.
TF027V Heavy Load Rear Specification: Spring rate 360 lbf/in, free length driver's side 420mm, free length passenger's side 410mm.
TF042 Medium Load Front Springs Specification: Spring rate 180 lbf/in, driver's side free length 385mm, passenger's side free length 375mm.

OME

2762 Rear Spring rate 300/340 Driver side 420 Passenger side 410
2777 Front Spring rate 180 Driver side 395 passenger side 375 spring rate 180

 

I run OME Nitrocharger shocks and Terrafirma MD springs No ACE 135lbs on the roof and I have zero body roll/sway.

 

Thank you for the help. These are front Springs only. Sorry I don't want Terra Firma products. Anything else. Someone said there's OME super heavy duty front springs from a Discovery 1 (Part# 2767). They said this can be used on a Discovery 2. Is this true?

I'm keeping the ARB bumper + HF 12k winch and all heavy gear on it full time. This truck is loaded.

 

Yes but you don't have an ARB with a heavy 12k HF with 200 lbs in the cargo bay.,

What about the yellow Britpart GAZ shocks with +2 length. Are those good also?

 

1) i have rear sls air ride.
2) i have ace
3) i only need front springs - im not getting rid of the sls air ride like some people say ./// never never never.

 

You ordered stock replacement springs. No lift and not heavy duty.

Maybe the extra weight clapped out your OG springs leading to the instability... And I think Richard was saying you were overloading the roof, not the truck.

You may want a taller or stiffer spring after you see how the front sits with those Britparts... Sounds like OME HD would work fine in your case.

Let us know how that works for you.

 

Not sure that you can put that much weight on with the SLS, it is designed for standard loading. Hopefully someone with it can chime in, but that is likely the problem

 

SLS is designed to adjust for weight on the towbar, so it's definitely supposed to deal with more than "normal" loading. Maybe not as much as is being added in this situation though.
The ACE system can be tested using a Nanocom or other specialty device. You sit in the truck with the engine running and it leaps around on its own -- very freaky. Perhaps that's another place to start doing some diagnosis. If the actuators test correctly, maybe one or both of the tilt detectors aren't working correctly.