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Old 07-19-2015, 08:48 AM   #1
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Silicone lube / Squeak Rear

My rear squeaks but only when I drive, if I try and bounce the suspension by hand I get no squeak.

I think I have narrowed it down to the sway bar rubber bushings.

There are also the upper and lower control arms but here is why I'm confident with my finding.

I sprayed motomaster silicone lubricant on the sway bar bushing and it does go for a time and then comes back.

I stopped spraying it as I've read since its suspended in a petroleum based solution that's not good for rubber. But it says on the can ok for rubber! ("Protects rubber mouldings and weather stripping")

So what do I use instead or what would my Ford dealer use if I asked them at my next service to lube them up?

Thanks

TM




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Old 07-19-2015, 11:03 AM   #2
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You don't lube elastomer rubber bushings. They make noise, you replace the part. the dealer will do this under warranty and give you a better part than what comes stock.

Alternatively, you can replace the bushings with poly end links, either pre-assembled like these, for regular GTs:

Ford Racing Mustang Sway Bar End-Link For Sway Bar M5490A

Or these for Brembo BP and GT500:

Ford Racing Mustang Sway Bar End-Link For Sway Bar M5490B

Or DIY with Energy suspension kit like this:

Energy Suspension 4.5195 - Rear Sway Bar Bushings - 24mm (0.94 inch). Energy Suspension ENE-4.5195G

Keep in mind the Energy kit here is for Brembo BP and GT500s only.

Silicone lube is fine to get on all rubber parts, as is silicone brake grease. Petroleum based greases should not be used on rubber or poly bushings.
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2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP
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Old 07-19-2015, 12:19 PM   #3
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Ok thanks for the advise and yea she's still under warranty.

As for the spray silicone lubricant its suspended in a petroleum distillate...

(Contains petroleum distillates: heptane, isobutane, and propane)

...as do all other silicone lubricant sprays, so is that bad to use when it says on the product suitable on rubber?!


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Old 07-19-2015, 12:28 PM   #4
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I have a few bottles of RC suspension silicone oil, would that work?


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Old 07-19-2015, 12:59 PM   #5
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First question is why? If you take it in for repair, you want it to be making the noise so they will fix it.

Second, petroleum distillates quickly evaporate. It is petroleum-based grease that sits there and eats away at the bushing over time.

Stop overthinking this, take it in to the dealer or use the aftemarket replacements I suggested and jog on.
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2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP
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