Who has had synchro problems with their 6speed? Stock or Aftermaket clutch?

modaddict · 12-02-2007, 11:09 PM

I heard that there is a possibility of a Twin Plate clutch causing premature wear on the synchros due to the plates getting hawt, warping and dragging, causing bad ju ju in the tranny.

So, I ask you.....IF you have/had problems with shifting in ANY GEAR....did you have the stock clutch, a Twin Plate, Triple plate, or an ACT/RPS HD clutch?

V8Huntr · 12-03-2007, 04:53 AM

I was on my stock clutch, 50,000 miles. Had 3rd, 4th, and 5th gear syncros replaced. I rarely ever launch my car and it's my DD.

Blinden · 12-03-2007, 05:03 AM

Quote:

Originally Posted by V8Huntr

I was on my stock clutch, 50,000 miles. Had 3rd, 4th, and 5th gear syncros replaced. I rarely ever launch my car and it's my DD.

How much did that run you?

I'm at 60k and 5th and 6th are grinding on me when I shift hard (+70mph) this had cost me a great deal of time on the 1/4, not that that really matters.

Stock clutch

V8Huntr · 12-03-2007, 05:07 AM

Mine was replaced under warranty cuz I got the extended warranty to 6yrs\100K miles. I looked at the dealer copy of the repair order and the syncros alone were $600 a piece. I think all in all it was almost $4000 in parts and labor. But it was free for me!

boostin05blacksti · 12-03-2007, 06:36 AM

i have 57k and my 5th does it when i get into boost should i go to the dealership...and also i have quite a bit of mods done..including exedy twin plate...thanks guys.

**Turninconcepts.com** · 12-03-2007, 06:58 AM

Don't remember when 4th went since it's been so long now. One of these days I'll swap in the spare tranny I have here and rebuild this one, but quite honestly I've gotten so used to timing up and downs into 4th that it's not a problem anymore.

ChristianCGM · 12-03-2007, 07:21 AM

I had it on my stock clutch, which was replaced at 27k with a RPS disk and resurfaced flywheel. It progressively got worse. I initially had valvoline dino oil in after the clutch change, switched to mobile synthetic and a couple of other different gear oils which all had the same problem. Then I decided to try a royal purple version of uncle scotty's coctail at 35k and have not had any problems since then. I am now at 67k.

fullerton · 12-03-2007, 08:11 AM

Quote:

Originally Posted by Turninconcepts.com

Don't remember when 4th went since it's been so long now. One of these days I'll swap in the spare tranny I have here and rebuild this one, but quite honestly I've gotten so used to timing up and downs into 4th that it's not a problem anymore.

I make it a point to rev-match and double-clutch as much as possible to make things as easy for my tranny as possible. I hate the idea of having to rebuild my tranny. If the time comes, I'll probably try and do the same route as you. Buy working one and rebuild sticker.

***Majin*** · 12-03-2007, 08:27 AM

not sure why "ACT or RPS HD (single plate...stock replacement)" is in the same choice, this should be at least 3 separate choices.

i have the RPS and it's not the same as the ACT.

modaddict · 12-03-2007, 12:03 PM

Quote:

Originally Posted by Majin

not sure why "ACT or RPS HD (single plate...stock replacement)" is in the same choice, this should be at least 3 separate choices.

i have the RPS and it's not the same as the ACT.

Because both ACT and RPS are close enough in torque ratings and probably are the most common clutch upgrades.

I guess I was talking about the 475lb ACT or the 500lb RPS rated clutches.

I have no idea what other clutches that ACT or RPS makes for our cars.

ChristianCGM · 12-03-2007, 11:15 PM

RPS has a 6 puck option as does ACT, ACT also has a 4 puck option.

wrb07sti · 12-08-2007, 03:39 PM

Quote:

Originally Posted by fullerton

I make it a point to rev-match and double-clutch as much as possible to make things as easy for my tranny as possible. I hate the idea of having to rebuild my tranny. If the time comes, I'll probably try and do the same route as you. Buy working one and rebuild sticker.

+1

I always do the same, its just habbit now. My Trans am has a POS tranny, the syn. have been griding since 25K, but as long as I rev match the downshifts I have no problems. I think the reason most clutches and trannys go out is because of poor driving, I have know most subarus trannys to go for the life of the vehicle, clutches usually in the ballpark of 100k. btw, i am a subaru dealer tech so I see alot of things most people dont.

Nasioc_STi · 12-09-2007, 04:06 AM

76k stock tranny

RdRacer301 · 12-09-2007, 08:48 AM

Quote:

Originally Posted by ChristianCGM

I had it on my stock clutch, which was replaced at 27k with a RPS disk and resurfaced flywheel. It progressively got worse. I initially had valvoline dino oil in after the clutch change, switched to mobile synthetic and a couple of other different gear oils which all had the same problem. Then I decided to try a royal purple version of uncle scotty's coctail at 35k and have not had any problems since then. I am now at 67k.

What kind of RP blend are you using? I've used Redline 2 part 75-80 & 1 part 75-80NS originally and did not have a problem. Thought about throwing a small amount of Shockproof for cold weather, but haven't seen it being used in street applications, so I'm a little hesistent about that.

My lazy (_|_) went with Mobil Dino @ 30k and I'm getting occasional synchro problems in 2th and 4th now. Was gonna go back to Redline, but would like to hear more about this Uncle Scotty's ****tail.

wrb07sti · 12-09-2007, 01:26 PM

royal purple will solve your grinding issues. I use to have the same grinding problem until i switched to royal purple 75 90 max gear! Great stuff!

View Poll Results: What clutch did you have IF you had synchro problems
Stock	10	83.33%
Twin plate	0	0%
Triple plate	1	8.33%
ACT or RPS HD (single plate...stock replacement)	2	16.67%
cusco/clutchmasters/tilton/etc.	0	0%
Multiple Choice Poll. Voters: 12. You may not vote on this poll

12-02-2007, 11:09 PM	#1
modaddict Spec C Club Car: 04 Crawford STi Fav Mod: CP35r 440whp Posts: 1,952 Join Date: Jun 2006 Trader Rating: (3)	Who has had synchro problems with their 6speed? Stock or Aftermaket clutch? I heard that there is a possibility of a Twin Plate clutch causing premature wear on the synchros due to the plates getting hawt, warping and dragging, causing bad ju ju in the tranny. So, I ask you.....IF you have/had problems with shifting in ANY GEAR....did you have the stock clutch, a Twin Plate, Triple plate, or an ACT/RPS HD clutch? This ad is not endorsed by this member. Please register or login to hide this ad.

12-03-2007, 04:53 AM	#2
V8Huntr Spec C Club Car: 04' WRB STi Fav Mod: TBE Location: Allentown, PA Posts: 1,600 Join Date: Sep 2006 Trader Rating: (0)	Re: Who has has synchro problems with their 6speed? Stock or Aftermaket clutch? I was on my stock clutch, 50,000 miles. Had 3rd, 4th, and 5th gear syncros replaced. I rarely ever launch my car and it's my DD.

12-03-2007, 05:07 AM	#4
V8Huntr Spec C Club Car: 04' WRB STi Fav Mod: TBE Location: Allentown, PA Posts: 1,600 Join Date: Sep 2006 Trader Rating: (0)	Re: Who has has synchro problems with their 6speed? Stock or Aftermaket clutch? Mine was replaced under warranty cuz I got the extended warranty to 6yrs\100K miles. I looked at the dealer copy of the repair order and the syncros alone were $600 a piece. I think all in all it was almost $4000 in parts and labor. But it was free for me!

12-03-2007, 06:36 AM	#5
boostin05blacksti Professional STI Driver Car: 05 STi Black on Gold Fav Mod: Stage 2 Location: new jersey Posts: 422 Join Date: Jun 2005 Trader Rating: (0)	Re: Who has has synchro problems with their 6speed? Stock or Aftermaket clutch? i have 57k and my 5th does it when i get into boost should i go to the dealership...and also i have quite a bit of mods done..including exedy twin plate...thanks guys.

12-03-2007, 06:58 AM	#6
Turninconcepts.com Authorized Vendor Posts: 4,822 Join Date: Jul 2003 Trader Rating: (50)	Re: Who has has synchro problems with their 6speed? Stock or Aftermaket clutch? Don't remember when 4th went since it's been so long now. One of these days I'll swap in the spare tranny I have here and rebuild this one, but quite honestly I've gotten so used to timing up and downs into 4th that it's not a problem anymore.

12-03-2007, 07:21 AM	#7
ChristianCGM Grassroots STI Racer Car: 05 STi CGM Fav Mod: whiskey tango Posts: 579 Join Date: Oct 2005 Trader Rating: (2)	Re: Who has had synchro problems with their 6speed? Stock or Aftermaket clutch? I had it on my stock clutch, which was replaced at 27k with a RPS disk and resurfaced flywheel. It progressively got worse. I initially had valvoline dino oil in after the clutch change, switched to mobile synthetic and a couple of other different gear oils which all had the same problem. Then I decided to try a royal purple version of uncle scotty's coctail at 35k and have not had any problems since then. I am now at 67k.

12-03-2007, 08:27 AM	#9
*Majin* A.X.D. Car: 2004 STi Location: LI, NY Posts: 12,790 Join Date: Apr 2004 Trader Rating: (2)	Re: Who has had synchro problems with their 6speed? Stock or Aftermaket clutch? not sure why "ACT or RPS HD (single plate...stock replacement)" is in the same choice, this should be at least 3 separate choices. i have the RPS and it's not the same as the ACT.

12-03-2007, 11:15 PM	#11
ChristianCGM Grassroots STI Racer Car: 05 STi CGM Fav Mod: whiskey tango Posts: 579 Join Date: Oct 2005 Trader Rating: (2)	Re: Who has had synchro problems with their 6speed? Stock or Aftermaket clutch? RPS has a 6 puck option as does ACT, ACT also has a 4 puck option.

12-09-2007, 04:06 AM	#13
Nasioc_STi Banned Car: White and Nerdy Fav Mod: PayPal !!! Location: Earth Posts: 217 Join Date: Nov 2007 Trader Rating: (0)	Re: Who has had synchro problems with their 6speed? Stock or Aftermaket clutch? 76k stock tranny

12-09-2007, 01:26 PM	#15
wrb07sti Banned Car: Grey 06 STi Fav Mod: APS BOV Location: El Paso, TX Posts: 167 Join Date: Mar 2007 Trader Rating: (0)	Re: Who has had synchro problems with their 6speed? Stock or Aftermaket clutch? royal purple will solve your grinding issues. I use to have the same grinding problem until i switched to royal purple 75 90 max gear! Great stuff! This ad is not endorsed by this member. Please register or login to hide this ad.