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Trying to get an idea of what power/tranny/driving style combos are working for people...

WRX tranny, RS Tranny, and Legacy SS tranny are not working for me. FP Green at 25-26 psi...just rolling the throttle on in gear is blowing them apart.

I used up most of my extra trannies and now I can't get into boost until my RA geared WRX tranny is ready to go in.

Dang man...what are you puttin' down? 400?

I'm not gonna have near that btw...I'll prolly set it @ 10 psi to be really safe (12-14 on very rare occasion).

You said you used up most of your extra trannies...have any left you are looking to sell?

I'm running a jdm 4.11 tranny now, its held up for about a year and some change, i ran a t-leg case and 97 impreza gears before that and it held up for about 6 months then 2nd gear blew, and before that it was an automatic which i stripped the pinion shaft teeth off of.

Doing lots of 12.7-13.0 @ 110 mph with a stock 1990 NA tranny. haha

Driving carefully on the stock 255,000 mile old tranny.

What the hell is 16g+?

I think, they're talking about the larger TD05 16g turbo???

Not a turbo guy either, don't know none of that stuff

Subaru_for_Life

Soul Shinobi wrote:Driving carefully on the stock 255,000 mile old tranny.

What the hell is 16g+?

jake15 wrote:I'm running a jdm 4.11 tranny now, its held up for about a year and some change, i ran a t-leg case and 97 impreza gears before that and it held up for about 6 months then 2nd gear blew, and before that it was an automatic which i stripped the pinion shaft teeth off of.

I had one of those two, but I sold it before putting it in. This is supposed to be my DD, so I'd like longer gearing.

Subaru for Life wrote:I think, they're talking about the larger TD05 16g turbo???

Soul Shinobi wrote:What the hell is 16g+?

That's correct!

shemoves wrote:Dang man...what are you puttin' down? 400?

I'm not gonna have near that btw...I'll prolly set it @ 10 psi to be really safe (12-14 on very rare occasion).

You said you used up most of your extra trannies...have any left you are looking to sell?

No idea... I just street tuned it. I have another legacy turbo tranny, but I'm saving that just in case.

I didn't hurt anything at 22 psi on a VF39. The trannies aren't super weak, but they do have a limit. At 12-15 psi a 16g is just starting to come to life and I wouldn't expect to blow any trannies with that kind of power...unless you break it launching it.

Shemoves-The tranny (OEM SS) that's currently in your car came from Innovative Tuning.

I had it in about 5-6 months before it sheared 1st.

Tranny before that was the OEM SS tranny and it lasted about 6 months w/ the 16G also...

I'd stick in either a MY03+ WRX tranny (beefier 2nd gear) or a JDM STI 5mt.

Matt, did you do a lot of launches or hard shifts on it? Or was it just 'normal' wear and tear from the increased power? I'm wondering if I could just be nice while shifting and make a stock replacement last a while...

Hey, congrats on the new Legacy

legacy92ej22t wrote:
I'd stick in either a MY03+ WRX tranny (beefier 2nd gear) or a JDM STI 5mt.

If you do decide the WRX route, folklore on NASIOC says that 05 is the best of all since it's got the beefier gears and better syncros.

06+ is worse since it's got the 3.70 gearing which puts more stress on the drivetrain.

That's what they say anyway.

shemoves wrote:Matt, did you do a lot of launches or hard shifts on it? Or was it just 'normal' wear and tear from the increased power? I'm wondering if I could just be nice while shifting and make a stock replacement last a while...

Hey, congrats on the new Legacy

No launches or hard shifting. Just normal wear and tear on the one currently in the car. It let go while turning a corner in the city doing maybe 10 mph, off boost.

My OEM tranny got launched a few times when I raced the car but nothing too squirlee. It blew 2nd when I rolled on boost, had my kid in the car and everything. I wasn't driving it hard at all.

4.11 tranny and rear diff Deadbolt TDO5-16G FOR THE MOTHER FUCKIN WIN!......your right about the gears being short, my car tops out at 135..not cause of loss of power..but because of the 5th gear rev limit lol.

legacy92ej22t wrote:

shemoves wrote:Matt, did you do a lot of launches or hard shifts on it? Or was it just 'normal' wear and tear from the increased power? I'm wondering if I could just be nice while shifting and make a stock replacement last a while...

Hey, congrats on the new Legacy

No launches or hard shifting. Just normal wear and tear on the one currently in the car. It let go while turning a corner in the city doing maybe 10 mph, off boost.

My OEM tranny got launched a few times when I raced the car but nothing too squirlee. It blew 2nd when I rolled on boost, had my kid in the car and everything. I wasn't driving it hard at all.

If I were to drop the 16g down to 9 psi (IIRC, that is what you said the lowest the BC would allow), how long do you think a stock replacement tranny would last driving normally (good shifts, but not afraid to down shift to pass on the freeway or give it some 'go' from a slow roll)?

impossible to say really...

It should last a long time since a 16g at 9 psi will barely make more power than the stock turbo. Maybe 20hp with all other things equal. The 16g won't really come to life until you run more boost.

Once again I will chime in on the reliability of the NA tranny I am using. 350-400 torque, about 36 drag launches on this power so far, running an unsprung six puck. And plenty of on-ramp tuning sessions.....

That's crazy man. All I had to do was roll on the throttle and my mint Impreza RS trans was gone.

legacy92ej22t wrote:No launches or hard shifting. Just normal wear and tear on the one currently in the car. It let go while turning a corner in the city doing maybe 10 mph, off boost.

That's how the stock tranny in mine went. Pulling into the MVA to get the tags for my Forester, pop goes 2nd.

I ran the OEM tranny, followed by a PPG straight cut synchro box (RWD), and then a dogbox.

The owner after me ran a stock WRX tranny (RWD), followed by a different dogbox, and then back to a stock WRX tranny (AWD).

The dogbox was, by far, my favorite.

As for which WRX tranny is the strongest? They all suck, truthfully. RA gears aren't really much stronger than stock WRX gears (I can explain, if necessary). Not strong enough to warrant the install money and time.

The only "strong" stock Subaru tranny is the 6-speed, and even they pop.

Got two 12.5 1/4 miles on my stock NA tranny last night, running about 112 mph!

GT3071R with an '05 6MT. I don't think I'll be throwing down enough power to push its limits, plus my axels should be the give point anyways.

other than the synchros wearing out in my NA 4.11 91 tranny, it's doing great on the track and on the street, granted I'm not boosting yet, but abuse is abuse.


it makes you wonder what the deal is with the NA trannys, and why they survive longer than other's.

Maybe the difference in clutch type gives different shock loads?

I've been running a stock 5spd tranny for a about a year with a vf8 running 15psi of boost without issue.

I really think it is just the draw. Before this was running a stock tranny with 210k miles on it. No problems other than synchros were going out. The current tranny has maybe 70k miles on it.

I don't drop the clutch though. Most of my starts are rolling starts from the lights and I'll munch it once I'm rolling. I have a stage 1 excedy clutch currently for a wrx, so nothing exception, but better than stock.