17' manual transmission noise
 

Hey guys, small question, my 2017 BRZ makes a weird noise when I put it into gear sometimes (the clutch is not engaged) like I can feel it move under the car and hear the gears pretty loudly. Sometimes the transmission kicks under the car, any idea if this is normal?

It's a manual transmission ..... it sits at your feet ...... it's shielded from the cabin by tin foil ..... most likely, what you are hearing is ..... "normal".

If it bugs you, I suggest you go drive another one to compare how it sounds .....;)


humfrz

Just going into place is all. Our shifter is connected directly to the transmission and our transmission can be noisy. All the weird sounds i hear in this car i train my mind to think of as racecar sounds, helps ease the paranoia that something may be broken. If something ever does break, gives you physical symptoms, or serious audible symptoms, you still have warranty.

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Totalled.
Dibs on Final Drive gear

Every manual transmission is different. I've found ours to be pretty rough and noisy. I normally don't have to slam gears when I'm hot rodding. But this car seems to require it or you'll miss a gear.

If you accelerate at low rpm it will make a sort of clanking noise this is normal. As for the kicking that's driver error and take setting used to.

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What's an 17 foot manual transmission? Maybe that's part of the problem.

:clap:How is shifting into gear driver eror? What could I be doing wrong?

This car's transmission is touchy and you have to be very precise when shifting otherwise it will jerk.

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It's normal.

There's enough spinning mass on the input side that for some time after you disengage the clutch it spins until the synchro grabs it.

I'll admit I was hella imprecise this morning on my way to work and jerked _a lot_.

But yeah, practice till it's smooth, OP.

On my good days and drives it feels just like an auto with no jerk.

Practice makes perfect.

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Maybe his transmission swap was overkill ...... :D


humfrz

Still not as extreme as Caitlyn's.

My guess is you are sitting at a light, the car is out of gear and your foot off the clutch.

The light Turns green, you push the clutch in, and shift into first.

You hear a clunk noise and feel the shifter move.

This is normal

When your transmission is out of gear and your clutch is engaged, the input shaft of the tranny is spinning with your engine and flywheel. As @Ultramaroon stated, the input shaft has enough rotating mass that it will continue to rotate for a short duration after your push the clutch in. That rotation will torque the synchro and gear when you select a gear and create a noise and feeling you described.

Now, if you push the clutch in and wait a couple of seconds (maybe 3) the input shaft will have stopped spinning and you won't get that anymore.

If you have driven hondas or other FWD vehicles in the past that have cable linkages or other longer/more complicated linkages, the play in the system may have isolated you from that noise and feeling before.

I'm still trying to figure out how he got a 17' transmission in there.
That's longer than the car.

:slap: ....... get over it!


:D


humfrz