2nd gear high rev grind

JayJay88 · 07-17-2020, 09:31 PM

Hows it going everyone! Ive had my 2016 Nismo 6 speed for about 3 months now. Bought it with 4600 miles now has 5600.

I've noticed from 1st to 2nd gear pulls, 1st grinds into 2nd gear. This isn't my first rodeo with manual cars. I've taken it to Nissan since it is still under power train warranty.

Service tech had test drove and i also took him for a drive. He explained to me since its not "broke" it would be useless to open a claim with Nissan since they will say that its still working. Ok i understand but this shouldn't be grinding with this amount of miles. I don't want to say previous owner babied it but it still has the original tires from 2016 with lots of threads left.

Anyone experience this or is experiencing?

Spartan 1771 · 07-17-2020, 09:46 PM

I have issues with it grinding from 5th to 6th. If I power through the gears hard and fast, it grinds. If I power through them up to 5th, then press the clutch, wait a second and then shift, It won't grind. The synchro is going and will progressively get worse over time. You may be having the same issue. I'm past warranty, therefore it's actually cheaper to replace the entire trans rather then open it and repair it.

JARblue · 07-18-2020, 02:02 AM

Base model or sport model with SRM?

If you have SRM, use it to 'learn' how the car wants to be driven. Then turn it off and try to mimic those same shifts.
If you don't have SRM, try slowing down your shifts at lower RPM gear changes. If driving hard and fast, the Z likes quicker gear changes. Try different things and you'll quickly feel what she likes

For the record, 1st and 2nd gear shifts in the Z34 aren't like other MT cars. But you can make it smooth with some practice and patience.

Cyber370 · 07-18-2020, 06:58 AM

My 2016 Nismo has been like this from new. The 6-speed tranny in our cars was designed for fast/smooth shifting at high speed in the upper RPM ranges. The downside of this is when driving slow and shifting at low RPMs you may get slight grinding or rough engagement. You need to slow down your shift speed to allow the synchros to engage. This is especially critical with the 1st to 2nd shift for some reason.

Rule of thumb: Drive fast, shift fast. Drive slow, shift slow.

JayJay88 · 07-19-2020, 08:26 PM

Every other gears are fine. But slamming 2nd at high rpms grind. Also when slowly downshifting onto 2nd while stopping has this bump going in and its kinda stiff.

Rusty · 07-19-2020, 08:47 PM

Quote:

Originally Posted by Cyber370

My 2016 Nismo has been like this from new. The 6-speed tranny in our cars was designed for fast/smooth shifting at high speed in the upper RPM ranges. The downside of this is when driving slow and shifting at low RPMs you may get slight grinding or rough engagement. You need to slow down your shift speed to allow the synchros to engage. This is especially critical with the 1st to 2nd shift for some reason.

Rule of thumb: Drive fast, shift fast. Drive slow, shift slow.

No........our gearbox came from a truck. So you shift it like a truck.

Ventruck · 07-19-2020, 08:50 PM

Has happened twice on hard pulls.

Like others said, the 1-2 isn't just....not it. Generally speaking I just accepted we could only go so fast with that shift, high or low RPM's.

Rusty · 07-19-2020, 09:05 PM

Quote:

Originally Posted by Ventruck

Has happened twice on hard pulls.

Like others said, the 1-2 isn't just....not it. Generally speaking I just accepted we could only go so fast with that shift, high or low RPM's.

My down shift from 2nd to 1st has to be slow with force. No matter what the speed. It's notchy. The downshift from 6th to 5th has to be slow. Otherwise, I will get a grind.

07-17-2020, 09:31 PM	#1 (permalink)
JayJay88 Base Member Join Date: May 2020 Location: WI Posts: 2 Drives: 16 Nissan 370z Nismo Rep Power: 4	2nd gear high rev grind Hows it going everyone! Ive had my 2016 Nismo 6 speed for about 3 months now. Bought it with 4600 miles now has 5600. I've noticed from 1st to 2nd gear pulls, 1st grinds into 2nd gear. This isn't my first rodeo with manual cars. I've taken it to Nissan since it is still under power train warranty. Service tech had test drove and i also took him for a drive. He explained to me since its not "broke" it would be useless to open a claim with Nissan since they will say that its still working. Ok i understand but this shouldn't be grinding with this amount of miles. I don't want to say previous owner babied it but it still has the original tires from 2016 with lots of threads left. Anyone experience this or is experiencing?

07-17-2020, 09:46 PM	#2 (permalink)
Spartan 1771 A True Z Fanatic Join Date: Nov 2009 Location: Western Maryland Posts: 1,280 Drives: Wife crazy & 09 370Z Rep Power: 105453	I have issues with it grinding from 5th to 6th. If I power through the gears hard and fast, it grinds. If I power through them up to 5th, then press the clutch, wait a second and then shift, It won't grind. The synchro is going and will progressively get worse over time. You may be having the same issue. I'm past warranty, therefore it's actually cheaper to replace the entire trans rather then open it and repair it. __________________ ~Rob -DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...

07-18-2020, 02:02 AM	#3 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,449 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	Base model or sport model with SRM? If you have SRM, use it to 'learn' how the car wants to be driven. Then turn it off and try to mimic those same shifts. If you don't have SRM, try slowing down your shifts at lower RPM gear changes. If driving hard and fast, the Z likes quicker gear changes. Try different things and you'll quickly feel what she likes For the record, 1st and 2nd gear shifts in the Z34 aren't like other MT cars. But you can make it smooth with some practice and patience. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

07-18-2020, 06:58 AM	#4 (permalink)
Cyber370 Track Member Join Date: Jul 2016 Location: Montreal, QC Canada Posts: 679 Drives: 2016 370Z Nismo 6MT Rep Power: 19371	My 2016 Nismo has been like this from new. The 6-speed tranny in our cars was designed for fast/smooth shifting at high speed in the upper RPM ranges. The downside of this is when driving slow and shifting at low RPMs you may get slight grinding or rough engagement. You need to slow down your shift speed to allow the synchros to engage. This is especially critical with the 1st to 2nd shift for some reason. Rule of thumb: Drive fast, shift fast. Drive slow, shift slow. JARblue likes this. __________________ "That’s when you know you’ve found somebody special. When you can just shut the fck up for a minute and comfortably enjoy the silence.”-Mia (Pulp Fiction)*

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07-19-2020, 08:26 PM	#5 (permalink)
JayJay88 Base Member Join Date: May 2020 Location: WI Posts: 2 Drives: 16 Nissan 370z Nismo Rep Power: 4	Every other gears are fine. But slamming 2nd at high rpms grind. Also when slowly downshifting onto 2nd while stopping has this bump going in and its kinda stiff.

07-19-2020, 08:50 PM	#7 (permalink)
Ventruck Track Member Join Date: Jun 2016 Location: California Posts: 782 Drives: '13 Sport+Touring M6 Rep Power: 22897	Has happened twice on hard pulls. Like others said, the 1-2 isn't just....not it. Generally speaking I just accepted we could only go so fast with that shift, high or low RPM's.