Subframe and Differential bushing ??? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Fred Flintstone · 10-07-2018, 11:25 PM

Just installed whiteline subframe insert bushings and Differential mount cradle insert bushings. Followed instructions close with no problems with bolt reinsert and proper torque spec. Now seems to have a wine through first gear after that nothing. Anyone else done the subframe and differential inserts?

churchx · 10-08-2018, 04:57 AM

Of course installing more rigid/less compliant bushings can increase NVH by not dampening vibrations/noise, that's given. Though i'd rather expect to hear some whine from gearbox mount/bushing change, not diff's, but it's after shaft next in transmission, possible. (also my guess is that whine is also in other gears, just that drowns in road/tire noise in faster speeds/lesser rpms, so you don't hear it).

StraightOuttaCanadaEh · 10-08-2018, 12:20 PM

Yes the whine is only present in first gear

churchx · 10-08-2018, 01:01 PM

To me whine was also in 2nd, and though rarely, sometimes i caught glimpses of that SC sound-alike quiet gear whine in 3rd too. Hence my idea that it's still there .. just that is drown among increasing other noises from tires/road/wind.

Fred Flintstone · 10-10-2018, 10:30 PM

Thanks all just worried I did something wrong during installation. Going to be replacing differential oil anyway have about 60,000 miles on it now. Also thinking about putting some sound deading material under seats to cut some of the road noise. Anyone do the steering rack bushing. Anything I should expect from doing this? Noise, feel, vibration, anything ???

10-07-2018, 11:25 PM	#1
Fred Flintstone Member Join Date: Oct 2014 Drives: 2015 FR-S Asphalt, racing stripes, Location: Texas Posts: 61 Thanks: 4 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Subframe and Differential bushing ??? Just installed whiteline subframe insert bushings and Differential mount cradle insert bushings. Followed instructions close with no problems with bolt reinsert and proper torque spec. Now seems to have a wine through first gear after that nothing. Anyone else done the subframe and differential inserts?

10-08-2018, 12:20 PM	#3
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,868 Thanks: 1,249 Thanked 1,734 Times in 1,025 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	Yes the whine is only present in first gear __________________ Instagram: @gt86ws

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10-08-2018, 04:57 AM	#2
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	Of course installing more rigid/less compliant bushings can increase NVH by not dampening vibrations/noise, that's given. Though i'd rather expect to hear some whine from gearbox mount/bushing change, not diff's, but it's after shaft next in transmission, possible. (also my guess is that whine is also in other gears, just that drowns in road/tire noise in faster speeds/lesser rpms, so you don't hear it).

10-08-2018, 01:01 PM	#4
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	To me whine was also in 2nd, and though rarely, sometimes i caught glimpses of that SC sound-alike quiet gear whine in 3rd too. Hence my idea that it's still there .. just that is drown among increasing other noises from tires/road/wind.

10-10-2018, 10:30 PM	#5
Fred Flintstone Member Join Date: Oct 2014 Drives: 2015 FR-S Asphalt, racing stripes, Location: Texas Posts: 61 Thanks: 4 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks all just worried I did something wrong during installation. Going to be replacing differential oil anyway have about 60,000 miles on it now. Also thinking about putting some sound deading material under seats to cut some of the road noise. Anyone do the steering rack bushing. Anything I should expect from doing this? Noise, feel, vibration, anything ???

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