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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.

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Old 10-13-2018, 07:29 PM   #15
bromatic train injury
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Originally Posted by NoHaveMSG View Post
No, mine is quiet. No shifting issues, have even made a 5-2nd shift a couple times by mistake on the track and no problems
Meh. Hold off on the partout.
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Old 10-13-2018, 07:55 PM   #16
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Originally Posted by Ultramaroon View Post
I've wondered about this but I figure as long as it runs dead silent, I won't worry.

What were your before/after numbers? Did you find anything to be sloppy?

The pinion bearing was a little loose but it didn't resolve anything. I had the diff swapped at the same time so I don't have the original gap but I remember the shop saying the spec was .003-.005thou.

Originally Posted by NoHaveMSG View Post
Did going through the diff help resolve some of the noise?

I have inspected most of the bushings in the rear of the car, but that doesn't rule out deflection being the source of the noise.

Not really, no. Only two things have helped so far: adding STI engine and transmission mounts which halved the problem and loosening the subframe which has whiteline inserts. I'm thinking to replace the bushings to stock at some point. I should mention that I have had the inserts for a while but didn't have this problem until I went supercharged.

Originally Posted by NoHaveMSG View Post
Haven't been able to isolate it to a specific instance that causes it. Sometimes it happens on/off throttle, sometimes it does it while swerving, sometimes it does it when I hit a bump. I does not happen under steady state load. I have had the whole back of the car up off the ground and shook parts until I thought it was going to come off the stands and haven't been able to replicate it on the ground. I thought it was a chassis part loose at first but I have kinda figured it is either a fatigued bushing that feels okay when it is static or possibly the diff. I have pulled the CV's and articulated them through their motion but they feel fine. I'm stumped.

I'm pretty much in the same boat, except nothing when swerving; On-off throttle and when putting in the clutch. Also I get a definite shudder at the same time.
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