Clint's findings on 6MT tranny fluid - Page 5

CJR_STi · 03-07-2007, 03:34 PM

Quote:

Originally Posted by Turninconcepts.com

So, I drained the latest ****tail, and completely flushed the tranny. For the flush I filled the tranny with Acetone, ran it for a few minutes with the car in the air, shifted through all the gears a number of times, and ran it for a few minutes more, and then redrained.

Now, I know folks are going to scream - "but the Acetone will decay your seals!!" "Oh, bad move Clint." or just "Clint, you're an idiot." <- this one is nothing new.

First off, I am not recommending you do this at all. I did it because I wanted a completely clean slate to start from, with no contamination. Second, it was only in for a total of less than 15 minutes. Third, I have a spare 6MT sitting on a pallet right here. If I majorly screwed something up doing this I would find the time or make the time to swap the trannies.

So anyway, I drained the acetone. Front diff came out clear, but the tranny fluid came out dirty. Another quick rinse, and it came out much cleaner. Enough to make me happy.

If you see I started the thread called "Synchros???" I have a similar problem and changed the tranny fluid using Redline 75W90 without success.

Please give me more details in the flush procedure you did, like acetone concentration, quantity, etc. It's the last thing I can do just before dropping the tranny and going the hard way.

005sti · 03-09-2007, 08:14 AM

Quote:

Originally Posted by CJR_STi

If you see I started the thread called "Synchros???" I have a similar problem and changed the tranny fluid using Redline 75W90 without success.

Please give me more details in the flush procedure you did, like acetone concentration, quantity, etc. It's the last thing I can do just before dropping the tranny and going the hard way.

the redline stuff is gl-4, the manual specifies gl-5...pretty sure that's significant .

LosGatosSTI · 04-23-2007, 11:17 PM

I started getting the 4th gear grind at a Thunderhill track day on Friday and was considering talking it in to the dealer to get the syncros looked at. I would much rather take care of it myself by changing the fluid instead of letting them tear my '05 apart.

Car has 20k miles on it and I have changed the fluid once about 5k miles ago using Valvoline 75w90.

**Turninconcepts.com** · 04-24-2007, 07:02 AM

Quote:

Originally Posted by LosGatosSTI

I started getting the 4th gear grind at a Thunderhill track day on Friday and was considering talking it in to the dealer to get the syncros looked at. I would much rather take care of it myself by changing the fluid instead of letting them tear my '05 apart.

Car has 20k miles on it and I have changed the fluid once about 5k miles ago using Valvoline 75w90.

I tried the valvoline, and didn't care for it.

LOLSTi · 04-24-2007, 08:14 AM

I like the Motul.

...my 2cents.

StiLimited · 05-20-2007, 07:36 AM

Quote:

Originally Posted by Turninconcepts.com

I will say this - my 4th gear synchro grind has returned. Kind of a bummer, but I do truly think it's worn out.

Why not try adding a little more friction modifier? Just add a little more each time till the grinding goes away for good.

LosGatosSTI · 05-21-2007, 05:01 PM

Motul Gear 300 helped quite a bit with smoothing out all the shifts...even when cold. The 4th gear grind is still here so I'm going to take it in to the dealer for work under warranty

Any advice on having the dealer (Santa Cruz Subaru) do a tranny repair???

Things for the dealer to replace while in there?? Maybe upgrade the clutch to something else?

Things to watch out for???

Thanks

***MacSTi*** · 05-21-2007, 08:55 PM

Amsoil Severe Gear 75W90....

jph · 05-21-2007, 10:16 PM

Quote:

Originally Posted by LosGatosSTI

Any advice on having the dealer (Santa Cruz Subaru) do a tranny repair???

FWIW; i was very pleased with the service i got at subaru santa cruz when i went there. never had them do any tranny work though.

J.

LosGatosSTI · 05-21-2007, 11:15 PM

Thanks JPH...I will report back on the service I receive at Santa Cruz Subaru.

Chris05STi · 05-22-2007, 03:11 AM

Amsoil Severe Gear 75W90 here too....works like butter....def felt a difference from the stock crap to this. Shifting is a lot easier now

!

Tip: Add in 4 qts of Amsoil Severe Gear 75W90 and you will be just about over the FILL LINE. Perfect everytime

.

Good2Go · 07-06-2007, 05:50 PM

Anyone have experience with commonly available synthetic oils like Mobil 1 75W90 or Valvoline 75W90 Synpower? These meet all the required specs and are available off the shelf. Might be very good options compared to the more exotic snake oils discussed so far.

Kirv · 07-06-2007, 07:36 PM

subscribed. replacing my tranny oil soon

DubyaSTi · 07-08-2007, 07:18 AM

+1 for Amsoil SVG 75 90.

After initially overfilling the trans, shifting was tougher then before. I was at first a little annoyed at the results but realized later on it was my own fault. I drained out about 1/2 a quart and the difference was night and day. Shifting is so smooth now.

Engmus · 07-08-2007, 01:42 PM

I can't believe someone called Amsoil and Motul snake oils. =l

04-23-2007, 11:17 PM	#63
LosGatosSTI Junior STI Driver Car: 05 STi Location: Los Gatos (Bay Area Nor C Posts: 123 Join Date: Feb 2005 Trader Rating: (0)	Re: Clint's findings on 6MT tranny fluid I started getting the 4th gear grind at a Thunderhill track day on Friday and was considering talking it in to the dealer to get the syncros looked at. I would much rather take care of it myself by changing the fluid instead of letting them tear my '05 apart. Car has 20k miles on it and I have changed the fluid once about 5k miles ago using Valvoline 75w90.

04-24-2007, 08:14 AM	#65
LOLSTi S204 Racer Car: RIP 02 WRX Fav Mod: 2004 Aspen White WRX STi Location: Cincinnati Posts: 3,621 Join Date: Dec 2005 Trader Rating: (1)	Re: Clint's findings on 6MT tranny fluid I like the Motul. ...my 2cents.

05-21-2007, 05:01 PM	#67
LosGatosSTI Junior STI Driver Car: 05 STi Location: Los Gatos (Bay Area Nor C Posts: 123 Join Date: Feb 2005 Trader Rating: (0)	Re: Clint's findings on 6MT tranny fluid Motul Gear 300 helped quite a bit with smoothing out all the shifts...even when cold. The 4th gear grind is still here so I'm going to take it in to the dealer for work under warranty Any advice on having the dealer (Santa Cruz Subaru) do a tranny repair??? Things for the dealer to replace while in there?? Maybe upgrade the clutch to something else? Things to watch out for??? Thanks

05-21-2007, 08:55 PM	#68
*MacSTi* I has BOOST! Car: 2005 Aspen White STi Fav Mod: LightWerkz Projector Retrofit Location: Somerset, NJ Posts: 1,850 Join Date: Feb 2006 Trader Rating: (12)	Re: Clint's findings on 6MT tranny fluid Amsoil Severe Gear 75W90....

05-21-2007, 11:15 PM	#70
LosGatosSTI Junior STI Driver Car: 05 STi Location: Los Gatos (Bay Area Nor C Posts: 123 Join Date: Feb 2005 Trader Rating: (0)	Re: Clint's findings on 6MT tranny fluid Thanks JPH...I will report back on the service I receive at Santa Cruz Subaru.

05-22-2007, 03:11 AM	#71
Chris05STi I Has a Turbo Timer Car: 2005 Subaru WRX STi Fav Mod: Every single one! Location: NJ Posts: 9,381 Join Date: Jun 2005 Trader Rating: (24)	Re: Clint's findings on 6MT tranny fluid Amsoil Severe Gear 75W90 here too....works like butter....def felt a difference from the stock crap to this. Shifting is a lot easier now! Tip: Add in 4 qts of Amsoil Severe Gear 75W90 and you will be just about over the FILL LINE. Perfect everytime.

07-06-2007, 05:50 PM	#72
Good2Go Silver Member Car: 04 STi Fav Mod: Driver weight reduction Posts: 119 Join Date: Oct 2005 Trader Rating: (4)	Re: Clint's findings on 6MT tranny fluid Anyone have experience with commonly available synthetic oils like Mobil 1 75W90 or Valvoline 75W90 Synpower? These meet all the required specs and are available off the shelf. Might be very good options compared to the more exotic snake oils discussed so far.

07-06-2007, 07:36 PM	#73
Kirv Professional STI Racer Car: 05 STi Silver Fav Mod: Rumble + Torque = COBB Stg2 Location: CT Posts: 727 Join Date: Aug 2005 Trader Rating: (8)	Re: Clint's findings on 6MT tranny fluid subscribed. replacing my tranny oil soon

07-08-2007, 07:18 AM	#74
DubyaSTi Spec C Club Car: WR Blue 05 Wingless Fav Mod: V-Limited lip/Kansai Diffuser Location: Long Island, NY Posts: 1,071 Join Date: May 2005 Trader Rating: (12)	Re: Clint's findings on 6MT tranny fluid +1 for Amsoil SVG 75 90. After initially overfilling the trans, shifting was tougher then before. I was at first a little annoyed at the results but realized later on it was my own fault. I drained out about 1/2 a quart and the difference was night and day. Shifting is so smooth now.

07-08-2007, 01:42 PM	#75
Engmus Amateur STI Driver Car: WRB, 04, WRX STi Posts: 47 Join Date: May 2006 Trader Rating: (0)	Re: Clint's findings on 6MT tranny fluid I can't believe someone called Amsoil and Motul snake oils. =l This ad is not endorsed by this member. Please register or login to hide this ad.