5mt out 6mt in

Flywheel, Clutch, Transmission, Axles, etc...

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GodSquadMandrake
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Post by GodSquadMandrake » Thu Mar 05, 2009 8:00 pm

Really the spider gears? Hmm. Is there any way to put in stronger spider gears or reinforce the R160?

Have you tried using Redline MTL for those syncros? That sounds like a stupendously short lifespan for those syncros but it happens I guess. It's all in how you shift. My RX7 had the same problem with syncros but the Redline MTL really helps. It's meant for trannies with syncro problems, the formula actually adds more friction between the syncro rings and helps them engage. A more slippery transmission oil can help reduce wear on the syncros and prevent that damage from happening in the first place. Redline has a bunch, I think Shockproof is the one that you would put in like a new manual transmission. I'd have to check about the Hypoid differential thing though. I don't know if it meets the stricter requirements for that.
-Doug Wilson

Legacy777
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Post by Legacy777 » Thu Mar 05, 2009 8:04 pm

Subaru transmissions need to have GL5 rated oil due to the hypoid gears in the differential sharing the fluid with the syncros.

Unfortunately, the ideal fluid for hypoid & syncros are not the same, so there's typically a compromise....
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

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ScottyS
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Post by ScottyS » Thu Mar 05, 2009 9:26 pm

All the local Subi club AutoX and track guys here swear by Redline Lightweight Shockproof for the MT's, I've been running it myself in a '98 GF8 for a few years now with no issues.
1991 SS build thread: http://bbs.legacycentral.org/viewtopic.php?t=40430

93forestpearl
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Post by 93forestpearl » Thu Mar 05, 2009 10:14 pm

When I got T-boned in August, I was using Valvoline dino 75w90. The only other oil that worked well was Amsoil Syncromesh, but it is a 5w30 with a ton of friction modifiers in it. I took it out because it didn't work well cold, but worked well hot. The Dino oil is the other way around.

When I do actually refresh the tranny, I'll be using Extra-S, the factory oil. A five gallon pail(the only way you can get it) is about $150 and change.



Mine was ran real hard before I got it, so these things can and do happen. A friend of mine tracked his '04 STi a ton, and ended up needing it refreshed for the same reason, except his problem was in the 3-4 shift, since he spent a lot of time on high speed tracks. He also roasted his R180 in a hard 45 minute session on the track.



I wouldn't worry about your rear diff so much. Unless you plan on hard launches with a lot of power, you should be fine. My motto is, cross that bridge when you come to it.
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Legacy777
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Post by Legacy777 » Fri Mar 06, 2009 7:25 pm

93forestpearl wrote:My motto is, cross that bridge when you come to it.



Very good motto to have.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

Legacy Rally Guy
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Post by Legacy Rally Guy » Sat Mar 21, 2009 3:26 pm

Legacy777 wrote: ...but even with the 5spd it makes driving it much more of a bear, ...


93forestpearl wrote: ... The 6 puck cerametallic with the light flywheel makes it much more of a bear to drive...


Hmm, I was thinking, "hmm, so it appears bear-ness is bad, unless it's my g/f.. then it's gooood!" sorry, I had to.. :3


93forestpearl wrote: ... and I only kill it every few days now. :lol: Since I haven't driven it in a hair over a month, I'd probably be back at noob status...


My six puck (non-sprung) clutch didn't like anything near a smooth takeoff... mine would die every once in a while...


93forestpearl wrote: ... I do like the engagement of the 6 puck though. It feels very solid, and it laughs at me if I launch at 5k. My axles probably aren't laughing though....


OH Sweet Jesus! 5K launches... O.o My trans would have died for sure, I swear my quick run through kleinkid's old trans the other day killed it second gear... I was so bummed too, cause that lil 5spd had done so well too! Vincent sold it to me back in July, and it never gave me any issue until the day second gear died. I just had an ACT HD pressureplate and stock, but new SS clutch... I swear it doesn't feel like my cars THAT powerful, but I guess it's a combination of things...

So these six speeds aren't any longer the weak link once installed? I can handle breaking axles... they're MUCH CHEAPER!
1991 Legacy N/A- Being built to withstand zombie apocalypse!
2004 WRX STi- (GT3076r, 850cc Deatchwerks, Unequal Length Headers, FMIC, Alum Driveshaft, Camber Kit, Daily Driver)

biggreen96
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Re: 5mt out 6mt in

Post by biggreen96 » Sun Aug 22, 2010 5:03 am

How do you have the speedometer hooked up? I'm sitting here in the rally car doing wiring and realized there is no speedo cable coming out of the 6mt, just that sensor. Can I tap that and make the stock cluster display current speed?
You have to drive and you and have to try if you want the win, you don't achieve anything if you just cruise around - Jari-Matti Latvala

MikeyMeyagi
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Re: 5mt out 6mt in

Post by MikeyMeyagi » Sun Aug 22, 2010 6:47 am

biggreen96 wrote:How do you have the speedometer hooked up? I'm sitting here in the rally car doing wiring and realized there is no speedo cable coming out of the 6mt, just that sensor. Can I tap that and make the stock cluster display current speed?

remove the sensor and screw in the gray plastic peice with the cable sticking out of it.
94 Supra Turbo 6 speed. build in progress
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biggreen96
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Re: 5mt out 6mt in

Post by biggreen96 » Sun Aug 22, 2010 6:49 am

Serious? Damn, ok. Too easy. Thanks man.
You have to drive and you and have to try if you want the win, you don't achieve anything if you just cruise around - Jari-Matti Latvala

kimokalihi
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Re: 5mt out 6mt in

Post by kimokalihi » Sun Aug 22, 2010 7:06 am

lol yup. My trans came with a sensor too but I just unscrewed it and screwed in my speedo cable.
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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
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AaronNault
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Re: 5mt out 6mt in

Post by AaronNault » Mon Jan 31, 2011 9:53 pm

So I see there is alot of information all scattered aorund in here about the 6mt swap but did anyone ever come up with a write up about it so its a little more condensed and not so scattered? I am highly considering doing this swapp so I was wondering.

Magnetrax
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Re: 5mt out 6mt in

Post by Magnetrax » Sat Apr 02, 2011 9:01 pm

can anyone clarify the details about swapping stubs.
do the 04's come with the correct axle stubs from the factory?
do you have to split the trans to install the correct stubs? if so, how do you do that?

thanks for all the info on this thread! my 91 needs a new tranny and I'm thinking it is worth the extra $1500 to get a 6mt.
yea buddy.

biggreen96
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Re: 5mt out 6mt in

Post by biggreen96 » Sat Apr 02, 2011 9:56 pm

Some do some don't. My 04 didn't. You don't have to split the case, but you do need to install new stub specific seals which involves undoing the rings on the side of the case. It was a 1 hour job with the trans on the workbench.
You have to drive and you and have to try if you want the win, you don't achieve anything if you just cruise around - Jari-Matti Latvala

Legacy777
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Re: 5mt out 6mt in

Post by Legacy777 » Sat Sep 03, 2011 3:41 am

I'm stickying this
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

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chochocho
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Re: 5mt out 6mt in

Post by chochocho » Tue Sep 06, 2011 6:18 pm

how did you folks that did the 6 speed swap get the speedometer to work? thanks.

Deride
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Re: 5mt out 6mt in

Post by Deride » Tue Sep 06, 2011 7:22 pm

Unscrew the electric speedo sensor from the tranny and screw the cable from the speedo into that hole.
2002 Impreza 2.0RS 6MT
2001 Impreza 2.5RS 5MT (winter beater)
1992 Jeep Cherokee
1994 SS 5MT RIP
1991 SS 5MT *SOLD*
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chochocho
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Re: 5mt out 6mt in

Post by chochocho » Mon Jan 09, 2012 11:29 pm

Deride wrote:Unscrew the electric speedo sensor from the tranny and screw the cable from the speedo into that hole.


looks like i will be running the link ecu with the 6 speed.

if i went the route above, i would be able to get the speedo working (mechanical) but the ecu won't be able to get speed and gearing readings (electrical), correct?

is there a way to make the speedometer work mechanically and yet still be able to hook up to ecu to recognize speed electronically?

thanks.

yat

rallyak
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Re: 5mt out 6mt in

Post by rallyak » Tue Jan 10, 2012 6:54 pm

the ecm in our cars gets speed signal from speedometer , if the cable is hooked up and your speedometer is reading should be (electrical) a signal going to ecm.
Charles

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Legacy777
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Re: 5mt out 6mt in

Post by Legacy777 » Tue Jan 10, 2012 11:22 pm

Yat,

As mentioned in my email to you, the mechanical speedo outputs a digital signal to the ECU, so all you need to do is tap into that signal and run it to a digital input on your link.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

WRXish
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Re: 5mt out 6mt in

Post by WRXish » Fri Jan 13, 2017 3:31 pm

ok guys, 91 NA wagon here, 4.111 rear axle ratio, existing transmission is showing its age, thinking while I have the engine out, it would be a good time to install a new tranny....is there a 6 speed that will bolt in and work with my 4.11 rear axle? All the verbage at the beginning of this thread confused me because it wasnt clear to me what works with what. I would love to keep the 4.11 final drive since I am staying NA.

Alphius
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Re: 5mt out 6mt in

Post by Alphius » Fri Jan 13, 2017 4:22 pm

No there is not. The 6-speed is probably not a good option for you. 6th is generally a bit higher RPMs than most 5-speeds, and the trans alone costs in the ballpark of $3,000. The gear ratios are designed for racing, not efficiency.

biggreen96
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Re: 5mt out 6mt in

Post by biggreen96 » Fri Jan 13, 2017 7:27 pm

Unless you find a legacy spec B trans- not racing oriented, but still $$$$.
You have to drive and you and have to try if you want the win, you don't achieve anything if you just cruise around - Jari-Matti Latvala

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