FGX 40T Donating Members 142 Member For: 15y 1m 6d Gender: Male Location: WA - South of the River Posted 16/04/15 07:57 AM Share Posted 16/04/15 07:57 AM I just had the new Superpro Hybrid polyelast diff bush installed (2009 FG XR6 Turbo - 6 speed ZF). The bush is quiet however at 2750 through to 3250 RPM in third gear - normal acceleration - the car resonates a droning sound. I can not replicate the sound anywhere else. It was not there before the new diff bush was installed but is now very apparent? The guys that installed it said that the noise is due to the new bush being stiffer and the already existing diff vibrations (that I was unaware I had) was now being transmitted/amplified. They said the noise/vibration would have always been there but would have been masked by the OEM rubber bush. Is this what others have experienced with replacement diff bushes? Or are they covering themselves? Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/ Share on other sites More sharing options...
.Stripes. All stock bar the k&n panel filter Silver Donating Members 8,061 Member For: 13y 1m 28d Gender: Male Location: Perth Posted 16/04/15 08:02 AM Share Posted 16/04/15 08:02 AM Yep, harder bushes transmit NVH more than soft rubber bushes. Not sure on your noise exactly, but could be diff whine...in which case, that's pretty common for these cars unfortunately. When was your diff oil last changed? Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1539988 Share on other sites More sharing options...
FGX 40T Donating Members 142 Member For: 15y 1m 6d Gender: Male Location: WA - South of the River Posted 16/04/15 12:44 PM Author Share Posted 16/04/15 12:44 PM Thanks - not sure. The car has been serviced every 7500km since new. Just passed 80k on the clock. How often should it be changed? Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1540039 Share on other sites More sharing options...
turbotrana Member 2,586 Member For: 22y 1m 11d Gender: Male Posted 16/04/15 02:27 PM Share Posted 16/04/15 02:27 PM Did you sort out the stalling issue you had? Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1540043 Share on other sites More sharing options...
.Stripes. All stock bar the k&n panel filter Silver Donating Members 8,061 Member For: 13y 1m 28d Gender: Male Location: Perth Posted 16/04/15 09:55 PM Share Posted 16/04/15 09:55 PM According to the Ford service manual the diff oil should be changed every 6 months if subjected to consistent high speed or city driving. A lot of people don't change it for years and wonder why their diffs are noisy. I'd start with changing the diff oil to something decent and see how you go. These diffs are super dirty little things. Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1540072 Share on other sites More sharing options...
Bizkets is Drunk? Too heavy needs boost Member 5,929 Member For: 11y 9m 5d Gender: Male Location: Adelaide Posted 16/04/15 10:16 PM Share Posted 16/04/15 10:16 PM 1 Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1540077 Share on other sites More sharing options...
Wilko16 Donating Members 1,672 Member For: 17y 5m 20d Gender: Male Location: Melbourne Posted 17/04/15 01:49 AM Share Posted 17/04/15 01:49 AM 15k old nulon diff oil...As he said "dirty little fookers" Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1540104 Share on other sites More sharing options...
FGX 40T Donating Members 142 Member For: 15y 1m 6d Gender: Male Location: WA - South of the River Posted 17/04/15 04:13 AM Author Share Posted 17/04/15 04:13 AM Thanks will try changing diff oil and see if it helps. The more I drive it -feels like vibration resonating through the car. I am back to work so may be a week or two before I can get it done. Will keep you posted. CheersRe: the idle issue - still unresolved. Only very intermittent though- 3 to 6 monthly Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1540136 Share on other sites More sharing options...
FGX 40T Donating Members 142 Member For: 15y 1m 6d Gender: Male Location: WA - South of the River Posted 16/10/15 08:42 AM Author Share Posted 16/10/15 08:42 AM Sorry - never got back to you. Problem solved. The new hybrid polylast diff bush was either installed incorrectly or there was a fault with the bush. Installer blaming the bush and the bush distributor blaming the installer.Anyway the diff bush walked its way out and completely separated. The car had to be flatbed towed to the place that replaced the bush the first time, and at my cost for both the Tow and have the job re-done (this time with an OEM bush), vibration issue gone. What a joke. I have now severed ties with this company. Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1565226 Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 5m 17d Gender: Male Location: Probably above atmospheric pressure Posted 16/10/15 05:00 PM Share Posted 16/10/15 05:00 PM Severed ties with the installer or Superpro? Link to comment https://www.fordxr6turbo.com/forum/topic/90379-hybrid-polyelast-diff-bush/#findComment-1565249 Share on other sites More sharing options...
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