Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - One week with the BRZ, clunking into first gear?

tanner · 08-04-2013, 08:51 PM

Yeah of course I look for THUMP instead of clunking or syncro, then I find things... basically what they're saying:

BRZ MANUAL TRANSMISSION SOUNDS

You may notice, or customers may question, a "thump" or "thunk" sound intermittently when placing the new six-speed manual transmission into first or reverse while stopped. This is a characteristic of the transmission operation which occurs when any remaining input shaft rotation is brought to a quick stop by gear selection. If enough time is given for the shaft to stop turning on its own, then no thump will occur. No wear or damage is occurring as a result of this action. This sound may be more noticeable as the gear oil warms and gear selection is able to be accomplished with greater speed.

So what I need to try out is repeat this test and wait a few more seconds before shifting into first and see if the clunking noise is gone.

08-04-2013, 08:51 PM	#3
tanner Senior Member Join Date: Jul 2013 Drives: '10 S4/'13 BRZ/'16 GT4/E30 M3 Location: Markham Posts: 329 Thanks: 9 Thanked 127 Times in 92 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Yeah of course I look for THUMP instead of clunking or syncro, then I find things... basically what they're saying: BRZ MANUAL TRANSMISSION SOUNDS You may notice, or customers may question, a "thump" or "thunk" sound intermittently when placing the new six-speed manual transmission into first or reverse while stopped. This is a characteristic of the transmission operation which occurs when any remaining input shaft rotation is brought to a quick stop by gear selection. If enough time is given for the shaft to stop turning on its own, then no thump will occur. No wear or damage is occurring as a result of this action. This sound may be more noticeable as the gear oil warms and gear selection is able to be accomplished with greater speed. So what I need to try out is repeat this test and wait a few more seconds before shifting into first and see if the clunking noise is gone.