Nissan 370Z Forum - View Single Post - 1st Gear high pitched whine, and super high pitched whine downshifting into first

wdkwang · 04-10-2013, 03:54 PM

One detail I forgot to mention in my OP was how I experimented with 1st gear downshifts around last summer. I seem to be only getting the very loud noise when I use SRM, plus there is the hesitation of going into first. I don't believe there is a lockout, otherwise we wouldn't be able to get into first at all, but more so just the syncros preventing the gear to engage due to the difference in rotating speeds of the input and output shafts. Last summer, if I remember correctly, I was able to smoothly engage first without the crazy noise by either rev matching or double clutching into first. Putting those 2 experiences together, it seems that SRM sucks for first gear.

04-10-2013, 03:54 PM	#16 (permalink)
wdkwang Track Member Join Date: Nov 2010 Location: N/A Posts: 899 Drives: slidewayz Rep Power: 21	One detail I forgot to mention in my OP was how I experimented with 1st gear downshifts around last summer. I seem to be only getting the very loud noise when I use SRM, plus there is the hesitation of going into first. I don't believe there is a lockout, otherwise we wouldn't be able to get into first at all, but more so just the syncros preventing the gear to engage due to the difference in rotating speeds of the input and output shafts. Last summer, if I remember correctly, I was able to smoothly engage first without the crazy noise by either rev matching or double clutching into first. Putting those 2 experiences together, it seems that SRM sucks for first gear. __________________ Powerhouse Amuse \| K&N Typhoon Intakes \| MotorDyne ART Pipes \| Borla Catback Exhaust \| B&M Short Shifter \| Intake Ducts \| Ichiba 25mm F/R Spacers \| Carbon Fiber Interior Vinyl Wrap \| Tints \| 10000k HIDs \| Vtak, yo!