Medium duty front heavy duty rear springs?

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robhtid

robhtid

Well-Known Member
Posts
272
Location
Blackpool
Hi does anyone here run +40mm heavy duty springs rear and medium on the front?

I have a 03 td5 and do abit of towing, smallish trailer and a caravan so was thinking going HD on the rear would improve the drive when towing but im a wondering if its going to be too bouncy under normal driving?

If we use the disco to go out on a day trip my young daughter can get 'sea sick' in the back I'm thinking it will also help with the wollowing?

Thanks
 
I had HD on the rear of one of my discos I found it very thumpy not nice to drive on harsh roads
good for towing boats, I prefer them with air bags the ride is so much better.
 
I'm not 100% sure to be honest, if it was all in and running I'd maintain and keep it but since it's been off for a long as I know of chances are it wont be in good nick, the relay has been pulled so the compressor wont have turned for a long time! I'm not going to restore it and inherit the issues arround it. Its springs here onwards
 
Don't know if this applies or is even possible on a D2, but on my D1 I put heavy dutys on the rear and put the old rears on the front, precisely cos I too was going to do a lot of heavy trailering. I gained a 2" lift I didn't ask for but it drives really well and tows absolutely fine long distance mostly on Mway but lots on A roads too. However I had already fitted GAZ shocks which, in the day were great and REALLY cut down the body roll, so I'd advise uprating the shocks too which would help with carsickness, I'da thort. Maybe even just do that then do the rear springs. Keep the old springs anyway as it gives you the options.
Best of luck.
 
Heavy Duty Rear springs are an incredibly high spring rate with most suppliers - typically 320 lb / inch compared to standard of 160 lb/in.
The normal recommendation to fit these is only when your regularly carrying many 100s lbs of extra gear in the rear - otherwise they're far too hard.
Even Medium Duty is fairly excessive at 290 lb/in without lots of weight to make them work.
PS If it's wallowing currently, its probably time to consider changing dampers
 
Think it depends a lot on whether you will be towing a single axle or a multi axle. I found a Dixon-Bate imperative with my twin axle rig. But many towers put a lot of weight on the towball, more than they should often, to counteract sway. Sensible to get the trailer on level ground and check the weight at the towing eye is within spec, as well as balancing the load properly.
 
Pawl said:
Heavy Duty Rear springs are an incredibly high spring rate with most suppliers - typically 320 lb / inch compared to standard of 160 lb/in.
The normal recommendation to fit these is only when your regularly carrying many 100s lbs of extra gear in the rear - otherwise they're far too hard.
Even Medium Duty is fairly excessive at 290 lb/in without lots of weight to make them work.
PS If it's wallowing currently, its probably time to consider changing dampers
Click to expand...
Perhaps i should have mentioned that when I am towing I have the Disco packed to the eyeballs as well as a trailer on the back. Wine mostly, which is heavy duty on the springs!
 
I’ve got Terrafirma HD springs all around and regret it. Rides terribly rough. I mainly bought the HD springs so they wouldn’t sag as fast as the MD springs.
Soon I’ll replace with MD springs.
 
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