1 ton shackles and new springs question

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SeriesJay

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Droitwich
Evening all, possibly got a bit of a dilemma, I have a 109" s2a with 1 ton shackles, I've recently bought nice shiney new springs for it as the current ones are rather worn and flat (been that way since I bought it), I've read plenty on the pro's and con's of 1 ton shackles, and fitting new springs, but thats not my issue, my general view of things are 1 ton shackles are fine with worn springs but is there anything to beware of with new springs and 1ton shackles? I can't seem to find what I'm looking for on the forums :confused:. Hope someone can help shed a bit of light on it for me.

James
 
Last edited:
What is it that you're worried about? :confused:

One ton shackles were made to fit to new shiny springs.....surely?

Only thing to watch for is if the shackles were fitted when the springs were already flat you may need an extended flexi brake hose
 
the 1 ton bits were on it when I bought it, and the springs were flat then, is it just the brake flexi's I need to worry about? (going stainless flexi's when santa brings them anyway, so thats not a worry)
 
Prop angle on the front can get very marginal, I've had a propshaft exit the vehicle stage right when it bound up and let go. You should be fine on the back especially as you've got a 109".
Rocky Mountain sell angle correction wedges that fit between the axle and springs to re-align the diff.
 
I have extended shackles and new springs on the back of my 88", which would have a more severe prop angle, for the last 6 months with no issues. Worst comes to worst you will just have to replace the joints in the propshaft, neither an expensive nor difficult procedure. It's really a trade off between how much lift you want, and reducing the service life of the prop UJ's.
 
Spyderman said:
Prop angle on the front can get very marginal, I've had a propshaft exit the vehicle stage right when it bound up and let go. You should be fine on the back especially as you've got a 109".
Rocky Mountain sell angle correction wedges that fit between the axle and springs to re-align the diff.
Click to expand...

Considering it's originally set up for new springs anyway I wouldn't imagine the angle increase caused by 1 ton shackles is going to cause any problems.
After all 1 tons don't have correction wedges.
 
Thanks for all the replies, I'm hoping to change them over christmas and just wanted to get all the bits together beforehand and have an idea of any problems, I know the 1 ton landys had extended front of front and front of rear spring mounts too, which I think sorts out the correction wedge issue, so I may still need them.... I do have a set of 109" standard front shackles somewhere, so if I have any issues there I can just fit those until I can sort it, thanks again, and I hope this helps someone else in the future too :D
 
blue beasty said:
Considering it's originally set up for new springs anyway I wouldn't imagine the angle increase caused by 1 ton shackles is going to cause any problems.
After all 1 tons don't have correction wedges.
Click to expand...


BUT your forgeting the 1 ton chassis is very different. The front engine cross member has a section cut out to allow the front propshaft to not club the crap out of it. The front spring hangers all around are deeper to make the steering angle correct as std. lots of differences. To be fair tho you can get away with alot I'd say change them and see. some parabolics and 1 ton shackels together give a hidious lift not enough for the propshaft to actually fit as it should but it all depends on what you got.

Best thing is try them and see what you think
 
Think thats what I'm going to do, got 12 days off over christmas, so spend the first 2 days swapping springs and swearing at every rusted nut and bolt, finally giving up with a cup of tea then see what catches/clunks/completely disintegrates, then spend the rest of the holiday sorting it out :p
 
this here is a 1ton/combat chassis dumbiron

_DSC9068.jpg


you notice it has two holes, this is so that when it is lifted to the high ground clearance position (lower hole) it keeps the ujs at the correct angle, the nose of the diff doesn't droop and the "caster angle" of your steering is correct

fit military shackles without the corresponding dumbirons and all the above are affected

it's up to you

p.s.
that dumbiron is on my 88", genuine rover chassis :)
 
jai_landrover said:
BUT your forgeting the 1 ton chassis is very different. The front engine cross member has a section cut out to allow the front propshaft to not club the crap out of it. The front spring hangers all around are deeper to make the steering angle correct as std. lots of differences. To be fair tho you can get away with alot I'd say change them and see. some parabolics and 1 ton shackels together give a hidious lift not enough for the propshaft to actually fit as it should but it all depends on what you got.

Best thing is try them and see what you think
Click to expand...

Yep...yer right :eek:

And paras add a lift on their own. I was assuming standard leafers which are likely to lift an 1'' give or take over flat leafs.....paras would be likely to add 2'' or more....plus extended shackles and you could be heading for problems
 
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