Ivaan Posted November 5, 2011 Share Posted November 5, 2011 I've noticed a clonk at the rear as the car goes over large bumps. Rocking the car, side to side, using the roll bar, I can re-create the clonk in the garage. I've just got my son to do the rocking, and I can clearly see where it's coming from. The A Frame bush, that fits into the socket under the diff, is moving sde to side, hitting the ears welded to the axle. Is this usual? This bush appears to be the only point giving lateral restraint to the whole axle assembly? Planning a early blat tomorrow, so would like some advice. Thanks, Clive. Link to comment Share on other sites More sharing options...
6speedmanual Posted November 5, 2011 Share Posted November 5, 2011 It is. Unless completely disintegrating and rattly, it should survive another run. Peter Link to comment Share on other sites More sharing options...
Ivaan Posted November 5, 2011 Author Share Posted November 5, 2011 Just done a search on this. Loads of info in there. Powerflex looks the way to go. I've done over 6,000 miles since buying the car, so no surprise they're knackered. In the meantime, I assume the car's safe to drive. I'll replace asap. Clive Link to comment Share on other sites More sharing options...
Ivaan Posted November 5, 2011 Author Share Posted November 5, 2011 Cheers Peter Link to comment Share on other sites More sharing options...
elie boone Posted November 6, 2011 Share Posted November 6, 2011 I would replace the bush asap, the live of it depends on the fact that it is not contaminated with oil. Dry they can last a long time, contaminated they fail very fast Link to comment Share on other sites More sharing options...
Ivaan Posted November 6, 2011 Author Share Posted November 6, 2011 Just got back from our N Wales blat...picking up the pieces from the driveway! Once they start...they don't last long! Clive Link to comment Share on other sites More sharing options...
6speedmanual Posted November 6, 2011 Share Posted November 6, 2011 There you go. I said it would do another run! Just the one, mind! P Link to comment Share on other sites More sharing options...
blade_runner Posted November 6, 2011 Share Posted November 6, 2011 I'd be interested to know if you manage to get a 'poly' powerflex type bush as a replacement for the Y16 as i've looked in the past and not be able to track one down, it always seemed to be discontinued. ☹️ Link to comment Share on other sites More sharing options...
James_Russell Posted November 6, 2011 Share Posted November 6, 2011 A word of warning- once the bush is failing and you have that awful knocking going on, there are a lot of shock loads acting on the lugs welded onto the axle tube. I have seen these crack and fail in the past. Replace the bush as soon as they're worn out Don't bend the lugs out to make the new bushes fit in easier Re: lifespan, mine last approx one weekend! Link to comment Share on other sites More sharing options...
Ivaan Posted November 6, 2011 Author Share Posted November 6, 2011 BR - I'm assuming I can get one through the link dalongbloke gives here Fourth post down. James. 48Hrs...Blimey, Do you buy in bulk? Clive Link to comment Share on other sites More sharing options...
Eugene Posted November 6, 2011 Share Posted November 6, 2011 I've been using Y16 polyurethane bushes for years - same set is still in there... If you do a search you'll find my old postings 😬 Actually, I did a search - it was back in 2005 I fitted them!!! HERE 😬 😬 😬 Link to comment Share on other sites More sharing options...
blade_runner Posted November 6, 2011 Share Posted November 6, 2011 I'm currently running the rose jointed A frame on my car, the car being an ex racer, prototype etc etc came with the rose jointed A frame, and a spare Y16 bush type A frame. When I first got the car quite a few people (including Caterham) told me that running a rose jointed A frame on the road would rip the mounting off the axle, so I changed to the Y16. I ran that for years, But a fellow former Blade owner in Essex had ran the rose joined one for years with no problems on the road, so last year when the Y16 needed changing I swapped back to the Rose jointed frame, and I must say I noticed slightly more over steer on a trackday at Cadwell( I say over steer, more like I couldnt seem to get on the power quite as early), over the Y16 bush A frame, maybe this is due to stiffening the movement of the axle? Wondering if this would be the same with a poly bush in the standard type A frame? Link to comment Share on other sites More sharing options...
Eugene Posted November 7, 2011 Share Posted November 7, 2011 I noticed no variation with the poly bush over the rubber one, except for lasting a lot longer... The 'elasticity' seems very similar to me? Link to comment Share on other sites More sharing options...
John Hughes Posted November 7, 2011 Share Posted November 7, 2011 The rose jointed A frame reduces the resistance to roll to almost zero it certainly doesn't increase it. Had one on my previous live axle car - used on the road for over 6,000 miles with no problems. As the rubber bushes degrade the shock loads increase, I suspect it is this that starts the damage to the bracket on the axle which then fails after the change to the rose jointed item. Link to comment Share on other sites More sharing options...
elie boone Posted November 7, 2011 Share Posted November 7, 2011 For the ploy Y16 try e-bay, i can't comment on the quality as i never used those. I always use a washer inbetween the rubber halves, it's some sort of half way batween plain rubber bushes and a rose joint. Link to comment Share on other sites More sharing options...
David Mirylees Posted November 7, 2011 Share Posted November 7, 2011 Been using the Rose jointed A Frame since the part was introduced by Caterham. The present joint has been on the car for some 15 years and done something over 85,000 miles - still feels good. Before going over to the Rose joint I probably went through 4 or 5 sets of rubber bushes a year (got really used to doing roadside changes...) On my car, with the old x-flow, they were always covered with oil so it was unsurprising and anyway they probably were never meant to get the sort of wear and environment of the A frame as they were originally the Austin A35 top link bushes 😬... Link to comment Share on other sites More sharing options...
Brian Soper Posted November 9, 2011 Share Posted November 9, 2011 Part Number 88G274 from memory , must have change a few in 31 years of 7 ing.I made a nylon set once but was worried that they would transmit too much vibration into the braket and it would crack so I went back to the old bushes Brian Link to comment Share on other sites More sharing options...
David Mirylees Posted November 9, 2011 Share Posted November 9, 2011 One of the old boys... Leyland Part number absolutely correct 😬 Link to comment Share on other sites More sharing options...
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