Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 4m 11d Gender: Male Location: Perth Posted 12/10/16 01:45 AM Share Posted 12/10/16 01:45 AM I would if I was running a factory setup. But given the ims unit runs rubber bushes and channels the torque reaction from the diff into the two rear mounts I don't see the need for poly in the front. 1 Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 3m 8d Gender: Male Location: Perth Posted 12/10/16 02:21 AM Share Posted 12/10/16 02:21 AM (edited) I know the BAs run a factory solid front side diff bush. Will these fit BFas well. To me those voids are Inbuilt cracks just waiting to tear Edited 12/10/16 02:22 AM by arronm Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 4m 11d Gender: Male Location: Perth Posted 12/10/16 02:26 AM Share Posted 12/10/16 02:26 AM Im not sure you can still source the steel shell BA style bushes? 1 Link to comment Share on other sites More sharing options...
Force88 Donating Members 64 Member For: 14y 5m 20d Gender: Male Location: NQ Posted 12/10/16 02:31 AM Author Share Posted 12/10/16 02:31 AM apart from the extra cost over the OEM bushes, are there any downsides to using the superpro bushes instead? Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,752 Member For: 13y 6m 14d Posted 12/10/16 02:43 AM Share Posted 12/10/16 02:43 AM Stiffness equals vibration or noise possibly. There was a guy on facebook the other day that still had axle tramp with this kit cause he used standard Ford front bushes. The front needs to be as stiff as the rear to stop the diff rotating both ways under power. Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 2m 10d Gender: Male Location: Probably above atmospheric pressure Posted 12/10/16 02:57 AM Share Posted 12/10/16 02:57 AM I have felt a small amount of tramp a couple of times with mine, when it's wet and it's on the limit of grip. Pretty sure it was tramp anyway...was that rapid hitting feeling coming from the rear. I had brand new stock bushes put in there after the mechanic requested that to ensure precise fitment. My kings/koni suspension is probably coming up to about 175,000km old though so not sure if that would be contributing. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 4m 11d Gender: Male Location: Perth Posted 12/10/16 03:05 AM Share Posted 12/10/16 03:05 AM 20 minutes ago, gaz097 said: Stiffness equals vibration or noise possibly. There was a guy on facebook the other day that still had axle tramp with this kit cause he used standard Ford front bushes. The front needs to be as stiff as the rear to stop the diff rotating both ways under power. What shocks/spring/tyres/power level was he running? 1 Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,752 Member For: 13y 6m 14d Posted 12/10/16 03:38 AM Share Posted 12/10/16 03:38 AM No idea. I varied all them like 20 times to no effect of irs diff wind up. Once I stiffened up that diff, all was sweet. Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,752 Member For: 13y 6m 14d Posted 12/10/16 03:44 AM Share Posted 12/10/16 03:44 AM My very first rear end setup , fitted by Ford was standard side bushes, with a 100% solid centre bush. I have never felt diff thud so bad in my life Link to comment Share on other sites More sharing options...
HI PSI Member 1,586 Member For: 18y 8m 10d Gender: Male Location: Central Queensland Posted 12/10/16 12:50 PM Share Posted 12/10/16 12:50 PM I have the CAT600 front bushes in mine. Absolutely no difference in road noise over the standard bushes. Personally, I think that having the stiffer front bushes are a benefit and provide torsional stiffness in the IRS frame. My like the aftermarket engine mounts benefit the front end. 1 Link to comment Share on other sites More sharing options...
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