5th Gear Grinding = New Transmission

dozerdc · 02-07-2012, 09:01 PM

Just picked up my used 370Z and noticed grinding going into 5th gear. (Wasn't so surprised necessarily, since my 350 had a similar issue for quite a while with no real consequences.) Turns out Koons is going to give me a new transmission next week.

So...I'm curious if there's a way to take advantage of this by adding some mods...e.g, short shifter or something.

Any ideas?

ChrisSlicks · 02-07-2012, 09:33 PM

You could go to an aftermarket CSC if so inclined, and it would also be an ideal opportunity to do the clutch as it would cut the labor in half. See if they are willing to deal with aftermarket parts, otherwise just take the new factory parts and move on.

dozerdc · 02-07-2012, 09:35 PM

Yeah...thought about aftermarket clutch too. Hhmm...

eastwest2300 · 02-07-2012, 09:48 PM

damn, thats sooo unfortunate..

dozerdc · 02-07-2012, 09:49 PM

But it's a new transmission at least...or are you being sarcastic?

(certainly not expected development, but could be worse, right?)

eastwest2300 · 02-07-2012, 09:53 PM

Noooo no sarcasm here, its just bullsh*t, you'd think they woulda checked that when they received the car..i mean, like wtf?!!

dozerdc · 02-07-2012, 09:55 PM

Yeah...indeed. Thankfully it's under warranty and all.

eastwest2300 · 02-07-2012, 10:03 PM

thank goodness man, good luck bro

Cristobal09 · 02-07-2012, 10:14 PM

Id be nervous as hell if the tranny is already gone. Most likely the guy before you who had it drove it like an a$$hole and ragged the crap out of it. Id check all the fluids in it imo.

eastwest2300 · 02-08-2012, 06:28 AM

Quote:

Originally Posted by Cristobal09

Id be nervous as hell if the tranny is already gone. Most likely the guy before you who had it drove it like an a$$hole and ragged the crap out of it. Id check all the fluids in it imo.

It bothers me how the dealer didnt check the transmission..

ChrisSlicks · 02-08-2012, 07:45 AM

Quote:

Originally Posted by Cristobal09

Id be nervous as hell if the tranny is already gone. Most likely the guy before you who had it drove it like an a$$hole and ragged the crap out of it. Id check all the fluids in it imo.

The 5th gear grind is the most commonly reported transmission issue for the 6MT. The people on this forum that have reported it have been all over the spectrum, so I don't think it is a typical abuse related failure although there may be a certain driving habit that exposes it (e.g. skip shift placing extra burden on an already weak synchro). The later is just hypothetical conjecture, I haven't surveyed the owners to establish any pattern, was just using it as an example

dozerdc · 02-08-2012, 07:25 PM

But back to my question, any mods I should try to weave into this experience?

LennyZCSD · 12-08-2012, 12:56 AM

Quote:

Originally Posted by Cristobal09

Id be nervous as hell if the tranny is already gone. Most likely the guy before you who had it drove it like an a$$hole and ragged the crap out of it. Id check all the fluids in it imo.

Not really the 5th gear synchros are junk I am about to go in for a 2nd replacement for the same issue @ 55,000 miles..

MyKindaGuise · 12-08-2012, 11:01 AM

Quote:

Originally Posted by dozerdc

But back to my question, any mods I should try to weave into this experience?

Clutch, CSC, lightweight flywheel. Those are good mods to have as a prep for FI as well.

02-07-2012, 09:01 PM	#1 (permalink)
dozerdc Base Member Join Date: Jan 2012 Location: DC Posts: 60 Drives: 09 370z Sport Rep Power: 13	5th Gear Grinding = New Transmission Just picked up my used 370Z and noticed grinding going into 5th gear. (Wasn't so surprised necessarily, since my 350 had a similar issue for quite a while with no real consequences.) Turns out Koons is going to give me a new transmission next week. So...I'm curious if there's a way to take advantage of this by adding some mods...e.g, short shifter or something. Any ideas?

02-07-2012, 09:33 PM	#2 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	You could go to an aftermarket CSC if so inclined, and it would also be an ideal opportunity to do the clutch as it would cut the labor in half. See if they are willing to deal with aftermarket parts, otherwise just take the new factory parts and move on. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

02-07-2012, 09:48 PM	#4 (permalink)
eastwest2300 A True Z Fanatic Join Date: May 2010 Location: South FL Posts: 90,987 Drives: '16QX70/'21 Supra3.0 Rep Power: 2684550	damn, thats sooo unfortunate.. __________________ Infiniti QX70 & Toyota Supra 3.0 Premium

02-07-2012, 09:53 PM	#6 (permalink)
eastwest2300 A True Z Fanatic Join Date: May 2010 Location: South FL Posts: 90,987 Drives: '16QX70/'21 Supra3.0 Rep Power: 2684550	Noooo no sarcasm here, its just bullsht, you'd think they woulda checked that when they received the car..i mean, like wtf?!! __________________ Infiniti QX70 & Toyota Supra 3.0 Premium*

02-07-2012, 10:03 PM	#8 (permalink)
eastwest2300 A True Z Fanatic Join Date: May 2010 Location: South FL Posts: 90,987 Drives: '16QX70/'21 Supra3.0 Rep Power: 2684550	thank goodness man, good luck bro __________________ Infiniti QX70 & Toyota Supra 3.0 Premium

02-07-2012, 09:35 PM	#3 (permalink)
dozerdc Base Member Join Date: Jan 2012 Location: DC Posts: 60 Drives: 09 370z Sport Rep Power: 13	Yeah...thought about aftermarket clutch too. Hhmm...

02-07-2012, 09:49 PM	#5 (permalink)
dozerdc Base Member Join Date: Jan 2012 Location: DC Posts: 60 Drives: 09 370z Sport Rep Power: 13	But it's a new transmission at least...or are you being sarcastic? (certainly not expected development, but could be worse, right?)

02-07-2012, 09:55 PM	#7 (permalink)
dozerdc Base Member Join Date: Jan 2012 Location: DC Posts: 60 Drives: 09 370z Sport Rep Power: 13	Yeah...indeed. Thankfully it's under warranty and all.

02-07-2012, 10:14 PM	#9 (permalink)
Cristobal09 A True Z Fanatic Join Date: Nov 2011 Location: NOVA Posts: 1,430 Drives: 22 ZL1 & Explorer ST Rep Power: 3372	Id be nervous as hell if the tranny is already gone. Most likely the guy before you who had it drove it like an a$$hole and ragged the crap out of it. Id check all the fluids in it imo. __________________ 2022 Camaro ZL1 2021 Explorer ST

02-08-2012, 07:25 PM	#12 (permalink)
dozerdc Base Member Join Date: Jan 2012 Location: DC Posts: 60 Drives: 09 370z Sport Rep Power: 13	But back to my question, any mods I should try to weave into this experience?

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