Grind from 4th to 5th?

WRBSTI · 09-03-2005, 06:24 PM

Hey, I was wondering if anyone has a grind while shifting from 4th to 5th? This is only when I am on it and above 6000 rpms. I know it has to be the synchroes or however u spell it but it happened to me everytime at the dragstrip wednesday. Does anyone else have this and is there a cure?

***Digitalfiend*** · 09-03-2005, 08:39 PM

4th gear grind

Moving to Drivetrain...

WE_R_ND · 09-04-2005, 06:49 AM

I have the exact same problem. Fluid change can help this depending upon how far along the damage is.

polyol · 09-04-2005, 08:49 AM

Yeah I have the 4-5th grind...

mike_ · 09-04-2005, 05:17 PM

I've got the grind from 4th to 5th at very high RPMs, and have had it since the first time I tried going to 5th at high engine speeds. It catches me off guard since I rarely drive that hard into 5th, but just about every time it's the same old story, a little bit difficult to get 5th to catch, and there is always a quick grind if the shift occurs above ~5700rpms.

I'm curious if a slower shift into 5th will get rid of it, since I'm usually shifting hard/fast when it happens.

***Digitalfiend*** · 09-04-2005, 09:06 PM

How are you guys "quick shifting" into 5th? Do you push to the right and up to get it to go into 5th or do you pull it forward to centre, then right and then up? I've never had the 5th gear grind though I do notice more resistance when trying to shift using the first method. The only difficulty I've noticed with 5th is the occasional "rejection" - shifter won't go into 5th, but no grind.

After getting a few rejected attempts to go into 5th, I've just started shifting slightly slower and since then have had about 10K km without any difficulties. Try changing your shifting technique and see if that helps...

STiSchucky · 09-05-2005, 12:13 AM

i just slam it

. im on my 2nd time this has happened. first time warranty replaced it for 900 bucks. now that im more modded...im kinda weary what SOA will say, but if they want to keep putting these weak ass gears in and breaking easily, change the method and wont have to replace as much. I'll go back in when the warranty miles are gettin up there more.

***Digitalfiend*** · 09-05-2005, 08:52 AM

Quote:

Originally Posted by STiSchucky

but if they want to keep putting these weak ass gears in and breaking easily,

I highly doubt these are "weak ass gears" as the BigValley car was using the stock 6spd tranny for almost a year at 500+whp with hard launches and tuning, sometimes on slicks, before it broke 3rd. Recently the tranny survived 700whp (and probably similar torque) at the Evo vs WRX shootout. I think it is an impressive tranny to be able to hold ~400-500 lb-ft over stock at the drag strip on slicks.

burnin4 · 09-05-2005, 10:33 AM

I had the 4th-5th gear grind at high rpms. I found a subaru dealership in Huntington, WV that pulled the tranny and sent it to SOA, syncros were replaced under warranty. My car only had 2500 miles on it and there were no mods at the time. 16k later and it's perfect, and it's been to the dragstrip many times. SOA knows about this problem, so take it to the dealership and try to get it fixed under warranty.

EastSTi · 09-05-2005, 10:38 AM

Yea i have 10k on mine and have the same problem seems to be common...

WE_R_ND · 09-05-2005, 11:21 AM

I'll take it in at about 50K. I can deal with it until then.

**wdb** · 09-05-2005, 02:44 PM

The '06 STi reportedly has carbon plated synchros on 4th, 5th, and 6th gears. If you do get them done you might want to try to get them to put the new pieces in.

09-03-2005, 06:24 PM	#1
WRBSTI Professional STI Racer Car: 05 STi Fav Mod: Soon to be FP RED with Axis Stage 3 Block Location: Denver, Co Posts: 656 IWSTI Addict since: Oct 2004 Trader Rating: (2)	Grind from 4th to 5th? Hey, I was wondering if anyone has a grind while shifting from 4th to 5th? This is only when I am on it and above 6000 rpms. I know it has to be the synchroes or however u spell it but it happened to me everytime at the dragstrip wednesday. Does anyone else have this and is there a cure? This ad is not endorsed by this member. Please register or login to hide this ad.

09-05-2005, 02:44 PM	#12
wdb dances with roads Car: 2005 CGM STi Posts: 5,189 IWSTI Addict since: Apr 2005 Trader Rating: (8)	The '06 STi reportedly has carbon plated synchros on 4th, 5th, and 6th gears. If you do get them done you might want to try to get them to put the new pieces in. This ad is not endorsed by this member. Please register or login to hide this ad.

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09-03-2005, 08:39 PM	#2
*Digitalfiend* Super Moderator Car: 08 DGM STI Fav Mod: My wife :) Location: Brooklin, Ontario Posts: 5,842 IWSTI Addict since: Oct 2003 Trader Rating: (0)	4th gear grind Moving to Drivetrain...

09-04-2005, 06:49 AM	#3
WE_R_ND Spec C Club Fav Mod: Track Time Location: Des Moines, IA Posts: 2,267 IWSTI Addict since: Jan 2004 Trader Rating: (0)	I have the exact same problem. Fluid change can help this depending upon how far along the damage is.

09-04-2005, 08:49 AM	#4
polyol Spec C Club Car: 04 STi Fav Mod: Motor Mounts Location: Eugene Posts: 2,300 IWSTI Addict since: Oct 2004 Trader Rating: (0)	Yeah I have the 4-5th grind...

09-04-2005, 05:17 PM	#5
mike_ The Next Petter Solberg Car: Lightning Red STI Location: Westchester County, NY Posts: 924 IWSTI Addict since: May 2004 Trader Rating: (0)	I've got the grind from 4th to 5th at very high RPMs, and have had it since the first time I tried going to 5th at high engine speeds. It catches me off guard since I rarely drive that hard into 5th, but just about every time it's the same old story, a little bit difficult to get 5th to catch, and there is always a quick grind if the shift occurs above ~5700rpms. I'm curious if a slower shift into 5th will get rid of it, since I'm usually shifting hard/fast when it happens.

09-04-2005, 09:06 PM	#6
*Digitalfiend* Super Moderator Car: 08 DGM STI Fav Mod: My wife :) Location: Brooklin, Ontario Posts: 5,842 IWSTI Addict since: Oct 2003 Trader Rating: (0)	How are you guys "quick shifting" into 5th? Do you push to the right and up to get it to go into 5th or do you pull it forward to centre, then right and then up? I've never had the 5th gear grind though I do notice more resistance when trying to shift using the first method. The only difficulty I've noticed with 5th is the occasional "rejection" - shifter won't go into 5th, but no grind. After getting a few rejected attempts to go into 5th, I've just started shifting slightly slower and since then have had about 10K km without any difficulties. Try changing your shifting technique and see if that helps...

09-05-2005, 12:13 AM	#7
STiSchucky Professional STI Racer Location: Moorhead Minnesota Posts: 704 IWSTI Addict since: May 2004 Trader Rating: (1)	i just slam it . im on my 2nd time this has happened. first time warranty replaced it for 900 bucks. now that im more modded...im kinda weary what SOA will say, but if they want to keep putting these weak ass gears in and breaking easily, change the method and wont have to replace as much. I'll go back in when the warranty miles are gettin up there more.

09-05-2005, 10:33 AM	#9
burnin4 Spec C Club Car: 10 sec STi, 08 Z06 Fav Mod: TopSpeed Posts: 1,010 IWSTI Addict since: Aug 2004 Trader Rating: (3)	I had the 4th-5th gear grind at high rpms. I found a subaru dealership in Huntington, WV that pulled the tranny and sent it to SOA, syncros were replaced under warranty. My car only had 2500 miles on it and there were no mods at the time. 16k later and it's perfect, and it's been to the dragstrip many times. SOA knows about this problem, so take it to the dealership and try to get it fixed under warranty.

09-05-2005, 10:38 AM	#10
EastSTi S204 Racer Car: 04 Carbon Black ///M Fav Mod: Right Foot Location: Northern, NJ Posts: 4,964 IWSTI Addict since: Mar 2005 Trader Rating: (6)	Yea i have 10k on mine and have the same problem seems to be common...

09-05-2005, 11:21 AM	#11
WE_R_ND Spec C Club Fav Mod: Track Time Location: Des Moines, IA Posts: 2,267 IWSTI Addict since: Jan 2004 Trader Rating: (0)	I'll take it in at about 50K. I can deal with it until then.