Rumble coming from rear end?

[FakeWhiteMan]

Originally Posted by 7thgear

Probably

[mechaghost]

Originally Posted by 7thgear

well duh! If you left your rumble pack inserted you'll feel some enhanced force feedback. Check your OBD II port if it is installed there

[No Quarter]

Originally Posted by FakeWhiteMan

Are you doing 90 degree turns? When I leave my road it's like the diff is locking completely up.

Yup, did some more "testing" today. Definitely with wheels turned sharply, and then accelerating from a stop, I get lots of tire squeal, even though I'm not trying to "burn out". Does feel like the diff is locked out.

[Starscream15]

Originally Posted by Silver Bullet BRZ

Personally, I'd notify Optimus Prime.

Just sayin...

I just sent a PM to Megatron. Apparently I failed him again.

[Starscream15]

Originally Posted by Snoopyalien24

YOUR ANSWER

Oh this is simple. You see, you accidently left TBCA on when you didn't need it. You know Thermo-pnumatic Boost Centrifugal Adjustment. What this does is, with heat from when the car runs for a while adjust faster (Boost) exactly what the center is, and maintains it there. AKA "Centrifugal Adjustment" using heat (thermo) and pistons (pneumatic). This is highly used in much more expensive higher-end cars. Most track cars love to use this technology, sacrificing ride quality (but who cares, its a trackcar) for awesome handling. The only down fall to this technology is that since sometimes this "rumble" may get worse over time but it wont really affect the car, or the TBCA at all.

Source: Right here and explains how to solve this problem as well

!

[Lil Abner]

Originally Posted by DyoGTS

Does this only happen for the 10-20 feet outside of your driveway? Did they work on the street there in the past 6 months?
There is one specific spot in my neighborhood, right at a stop sign, where I get the same thing.... They recently re-poured the cement at that area (3 months) and the BRZ is the ONLY car that I can feel the difference on. Might be the same thing?

For that one specific spot, I'll put money on the pavement being the problem. Not the car. Even if your previous vehicles didn't do it, the fact that this car ONLY does it at that stop sign and not other signs says it's the location.

As far as turning sharp, it's the limited slip in the rear causing the tires to "chirp" under power. My FR-S does the same thing. So does my dad's GMC 2500 truck. Again, so does my dad's GMC Sonoma (pick-up with limited slip diff).

Are these things to be concerned about? NOPE!

Now, if it did the "rumble" at every start, then I'd worry. If it rumbled for several MILES in the morning, I'd worry. What has been described thus far in this thread seems like normal things for ANY car.

[ZILLA]

Originally Posted by Lil Abner

For that one specific spot, I'll put money on the pavement being the problem. Not the car. Even if your previous vehicles didn't do it, the fact that this car ONLY does it at that stop sign and not other signs says it's the location.

Mine WILL do it on every slow sharp turn. Very easy to reproduce ANYWHERE.

[Lil Abner]

Originally Posted by ZILLA

Mine WILL do it on every slow sharp turn. Very easy to reproduce ANYWHERE.

Originally Posted by Lil Abner

As far as turning sharp, it's the limited slip in the rear causing the tires to "chirp" under power. My FR-S does the same thing. So does my dad's GMC 2500 truck. Again, so does my dad's GMC Sonoma (pick-up with limited slip diff).

Correct. That's what I posted.

[5150unltd]

limited slip and tires was my 1st thought

[civicdrivr]

Yea, Im pretty sure its the diff. Mine does it when I move the car after being parked.

[old greg]

Originally Posted by ZILLA

Mine WILL do it on every slow sharp turn.

It's the differential just doing it's thing. You are only noticing it on slow sharp turns because that's when you have the greatest difference in relative speed between the inside and outside rear tires (and also, a lack of wind and road noise to mask it). A slight "rumble" is fine, if it changes to "WTF is that ungodly clunking?" then you might have a problem... or just a cam and pawl diff.

[ZILLA]

Thank you for the feedback... It is comforting to hear, but strange no one else is really bringing this up. I have never felt this in any of my previous cars, a few of which had LSD

[mact]

My 2001 IS300 did this. Was an automatic too.