ajh Posted September 6, 2015 Share Posted September 6, 2015 Due to a unique issue I'd like to investigate alternatives to bushings on the chassis end of the rear a-frame. Has anyone tried anything else, JJ etc? Quote Link to comment Share on other sites More sharing options...
dangerous doug Posted September 7, 2015 Share Posted September 7, 2015 No point in putting a jj at the chassis end as the a frame doesn't twist in the way they would allow use in a pair like that. Jj on the axle end would work but even the aftermarket a frames with a rose joint or jj at the axle end use bushes at the chassis end Quote Link to comment Share on other sites More sharing options...
landroversforever Posted September 7, 2015 Share Posted September 7, 2015 JJ would help at the chassis end, as the A frame only moves up and down and the bushes are angles it tries to peel the cross member apart at full bump. Putting JJ in there or similar would allow it to more far more freely. Quote Link to comment Share on other sites More sharing options...
dangerous doug Posted September 7, 2015 Share Posted September 7, 2015 Your right I forgot about that, having looked at it there not that bad though. And I would t have thought the advantages are not worth the 150 in jj's and bungs and then getting an a-frame made. Would help to know what the unique issue is though...... Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted September 7, 2015 Share Posted September 7, 2015 Lots of people use rod ends in a-frame applications, on a land rover you need to use bigger joints! Quote Link to comment Share on other sites More sharing options...
jabber Posted September 7, 2015 Share Posted September 7, 2015 I think QT sells an alternative to the A-frame joint (may be a jj) that bolts in place. I've seen quite a few setups with jj at the chassis end. I think they work really well, so long as you keep 'em lubed. They are pricey for the run of the mill off-roading, though. Quote Link to comment Share on other sites More sharing options...
ajh Posted September 8, 2015 Author Share Posted September 8, 2015 My problem has been having the material melt due to chemical exposure (B100); so I was hoping to replace with something that wouldn't melt if re-exposed. Quote Link to comment Share on other sites More sharing options...
simonr Posted September 8, 2015 Share Posted September 8, 2015 The simple answer is Polyurethane. It exhibits a small amount of swell with long term contact to BioDiesel - but it's only a couple of percent. I'm not a fan generally of PU bushings where elasticity is required, but they would last longer than rubber. Ideally you could make something similar in Viton which is unaffected. Replacing the Elastomer bushings with a hard, non elastic joint will result in higher noise levels, but may also lead to fatigue in the mounting points. Si Quote Link to comment Share on other sites More sharing options...
ajh Posted September 8, 2015 Author Share Posted September 8, 2015 This one is a poly; so it going soft was unexpected. It has not totally collapsed like a rubber one but it is a lot softer than it should be. I guess for now I'll replace it then top-coat with something to try to protect it. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 8, 2015 Share Posted September 8, 2015 .... what make poly...? 1 Quote Link to comment Share on other sites More sharing options...
ajh Posted September 8, 2015 Author Share Posted September 8, 2015 Good question; I'm not 100% sure... there's usually a bin of left-overs from kits and I grabbed a set from there at the time. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 8, 2015 Share Posted September 8, 2015 Suspect if it were orange it didn't need B100 to make it swell and fall apart! Quote Link to comment Share on other sites More sharing options...
simonr Posted September 8, 2015 Share Posted September 8, 2015 Try SuperPro - they are the only decent option I've found! Si 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 8, 2015 Share Posted September 8, 2015 Indeed, SuperPro all the way... 1 Quote Link to comment Share on other sites More sharing options...
ejparrott Posted September 16, 2015 Share Posted September 16, 2015 Superpro were a bloody nightmare for me, damn things wouldn't even fit between the chassis legs. Got a set of genuine polybush, fitted straight away no problems. Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted September 16, 2015 Share Posted September 16, 2015 Try SuperPro - they are the only decent option I've found! Si Lasted about 2 years on my 110. Metalastic is all I'd ever fit now. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted September 16, 2015 Share Posted September 16, 2015 I was a fan of Superpro but the last set I fitted lasted about 20k miles of not particularly hard life. So I've changed to genuine. We'll see how they last. Mo Quote Link to comment Share on other sites More sharing options...
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