i WAS up driving the mountains last night and i have been able to go into first from 0 -25 w/out a problem for 30k, well twice at like 10mph i tried to put it in first and w/the clutch in twice it friggin grinded unless i rev matched......i guess i started my custom dog box project!

-mikey

First gear is weird on WRX's. Rev-matching doesn't really help and it is easy to break the synchro.

My car "ate" 2 trannys. Thats when I bit the bullet and got a 6MT from an STi. Will report as soon as it gets here.

- Alex

hey alex, do you happen to know how much wheel hp or torque the sti 6 speed can handle. i am tossing around the idea of a dog box or the sti 6 speed. thanks

From what I have heard, they are very strong. Most of my "inside" info comes from Japan where 5MT's are known to break at about 350-400HP. So far, I haven't heard about a single 6MT that broke "under" power.

They are very strong. There are cast "rings" that act just like the block gurdle (sp?) and prevent from case flexing.

Also, 6MT has a hydrolyc lube system. It means there is a pump inside that circulates fluid and insure adequate lubrication.

Finally, diffs are in enclosed areas, so in case of a gear failure, the diffs will stay alive. Thats important, because the front Sure-Track LSD's aren't cheap. ;)

- Alex

thanks for the info.

i sure hope this doesnt happen to me... i frequently shift into first at just under twenty mph....i has no grind if it starts then i guess a dog box it will be.... i just dont want to spend the cash oh well pay to play...
Goat Lips

So far the STI 6spd sounds to be as big an improvement as the Silvia 6spd was over the old 5spd. Personally I'd like to see Subaru get with the people at Getrag to design a totally new gearbox. Casing and all.

Originally posted by MikeyWRX
i WAS up driving the mountains last night and i have been able to go into first from 0 -25 w/out a problem for 30k, well twice at like 10mph i tried to put it in first and w/the clutch in twice it friggin grinded unless i rev matched......i guess i started my custom dog box project!

-mikey

check the fluid level. When dropping down hold it in first and it will slide in when its lined up (it can take a few seconds.)

The more you drop to first the easier is goes in.

Originally posted by N/A
So far the STI 6spd sounds to be as big an improvement as the Silvia 6spd was over the old 5spd. Personally I'd like to see Subaru get with the people at Getrag to design a totally new gearbox. Casing and all.

That 6MT is a totally different gearbox, from the ground up. I hope it is better than my 2 5MTs as well.

Alex, I feel your pain man!

Andy

wow, seems like everyone with more than a couple mods is breaking 2 or 3 trannys. Is it pretty much a given that I will break mine once I go stage4? Whats it costing most of you to get them rebuilt/replaced?

It depends what you consider mods, and how you launch/drive your car.

Dropping the clutch = bad. On a stock WRX I think that will dork the tranny pretty quick. I would think that most of the people with big mods see some regular track time, Auto-x or drag. All in how you treat the gears like Lobster said.

I'm at 17,000 miles with out a single tranny problem, I do downshift but do not drop it into 1st gear. No dropping the clutch, I slip the clutch. I'd rather replace the clutch than the tranny :)

/\rcanum

Originally posted by Wheels
check the fluid level. When dropping down hold it in first and it will slide in when its lined up (it can take a few seconds.)

The more you drop to first the easier is goes in.

If you mean push untill it goes into first gear thats a great way to heat and wear your syncro's. Not a very good idea.

Thats what the idiot that sold me my car told me to do. :rolleyes:

~v6

I have over 100 13 second runs on my car and my tranny still works. Not the best, but it works.

I know Im not making that much more power than stock, but I drive it fairly hard. If i didnt break it yet, its pretty hard to break.

Either that or my tranny is as 'freak' as the rest of my car... which i dont buy at all.

~v6

Originally posted by V6turboTA
I have over 100 13 second runs on my car and my tranny still works. Not the best, but it works.

I know Im not making that much more power than stock, but I drive it fairly hard. If i didnt break it yet, its pretty hard to break.

Either that or my tranny is as 'freak' as the rest of my car... which i dont buy at all.

~v6

You shouldnt buy it ;), cause I made an equal amount of low 13 sec. runs and never experienced any kind of probs. I guess we are just the two best Subaru WRX drivers in the world :D

Originally posted by IMPREZIV
You shouldnt buy it ;), cause I made an equal amount of low 13 sec. runs and never experienced any kind of probs. I guess we are just the two best Subaru WRX drivers in the world :D

Yea, depending on how you launch your car, your tranny should more or less hold up.

well was out driving it today, i purposely put it into first at like 20 mph once or twice, went in fine.....came home tried putting it in first at like 5 and it grinded....weird wrx trans continues, as for busting a synchro i could care less, i get my "custom dog box" then, just want the gears to stay intact.......i also have like 50 auto x's on it as well as maybe 100 1/4 mile passes.....trans felt strong everytime, and i run mid 13's......

ONE question though, is it true that the trans case is the same subaru used for its 1.8 carb'd motors? whats the deal w/everyone breaking their trans, are they all ricers and dont know how to shift or is it that theyre just that weak, or have design flaws, or was a big bad batch made???

-mikey

Before shifting into first I usually, with my foot on the clutch, go into 2nd gear first.

mine has held up for the last 25,000 and i ran a 12.06 on it. i just hope it does not blow up on me the first day i put my new motor in.

I agree, they do suck. Thats why I actualy just went along with a 4EAT.

Originally posted by 128d
I agree, they do suck. Thats why I actualy just went along with a 4EAT.

:eek:

You like the auto better :eek:

I was behind a 15 second auto that spilled its tranny... Half the runs my car had on it.

~v6

The A/T cars might be slower in a drag race but they've proven to hold up much better on average then the M/T cars have. I know I'd love to have another M/T car. Just not one built by Subaru.

Auto's are no fun.:(

Originally posted by Lobster Man
Auto's are no fun.:(

naw, I'd argue they are *less* fun though...

Originally posted by N/A
The A/T cars might be slower in a drag race but they've proven to hold up much better on average then the M/T cars have. I know I'd love to have another M/T car. Just not one built by Subaru.

My car had twice the runs on it at the time when the auto broke. I since have porbably put another 50+ runs on my car with no problems.

If you dont have a manual WRX, how can you say it has a weak tranny? You might, i dont know... do you? :)

If you beleive what others say...

I got a bridge for sale, wanna buy it :) ;)

~v6

Originally posted by V6turboTA
My car had twice the runs on it at the time when the auto broke. I since have porbably put another 50+ runs on my car with no problems.

If you dont have a manual WRX, how can you say it has a weak tranny? You might, i dont know... do you? :)

If you beleive what others say...

I got a bridge for sale, wanna buy it :) ;)

~v6

But anecdotal evidence doesn't really count ;)

-chris

My point is (and if you knew me you would agree 100%) that if I didnt break it yet, its NOT weak. Maybe some of them are, but not mine.

trust me... I'm not nice to it... at all... ever.

It still works :)

~v6

I know the WRX M/T is weak because I've rebuilt them, changed plenty of broken ones out for friends and seen first had the wonderful engineering used by Subaru. Thats how I know they are weak. I posted a large amount of pics of the inside of the Subaru transmission on the other site. If you look at those pics you'd know what I'm talking about. The key with a A/T car is to not get it too hot by power braking the thing. Once the img option is working again I'll repost the pics of a M/T taken apart. Then you'll be able to see what I am referring to.

http://www.imagestation.com/picture/sraid28/p37033d8df3e1546e36c80c6912cc499d/fd6584ce.jpg

http://www.imagestation.com/picture/sraid28/p58df19b5281d5ad43ab75350f6e81400/fd65847d.jpg

http://www.imagestation.com/picture/sraid28/pca511aff8fd3d4d730ae30fa8abdfde9/fd658440.jpg

http://www.imagestation.com/picture/sraid28/pa7086517339c26d69340c252f9b5c7e4/fd657db0.jpg

http://www.imagestation.com/picture/sraid28/p47e0ed99cef4343564bffa5ec73d9ff7/fd657f26.jpg

http://www.imagestation.com/picture/sraid28/p7851f7db55c103bf4aa020f5a0b28bb8/fd651e0a.jpg

http://www.imagestation.com/picture/sraid28/p9a53932c18b40f12861feba2cafe12da/fd651f76.jpg

In this one you can see how far the input shaft travels from the bell housing to the first actual bearing. How small the first bearing actually is and how small the teeth are on the first and second gears.
http://www.imagestation.com/picture/sraid28/p7d0e66a17b2ba032f2e225778dd7e2fd/fd652441.jpg

Heh I didnt say there unbreakable :)

And you hit the nail on the head about powerbraking the auto :)

I guess we will just have to agree to disagree because I beat the snot out of my tranny everyday... I know its going to break, but it hasnt yet :)

Obviously you know alot more about them than I do, but I know I have been pounding on mine for over 25k miles so I just cant agree.

Wanna rebuild mine when it falls apart :)

~v6

http://www.imagestation.com/picture/sraid29/p3f9cdd196c368ee554fcd59c04c9b138/fd5fad92.jpg

A diagram of the gears.

and btw... you can put all those links in one post ;)

10 posts in a row is rediculous

~v6

2nd gear diagram.
http://www.imagestation.com/picture/sraid29/p4cafbb0c49515cf4c69514a054731a97/fd5fadc8.jpg

I'm actually working on a step by step walk through on how to rebuild the M/T so pretty soon I'll have a complete thing for you. I just need to see if Alex will host the walk through.

He just did ;)

I would like to see what your talking about when you finish it. Im not quite following the pics your sending.

I would love to increase my knowledge about the tranny and would appreciate any help.

Let me know

~v6

The first thing you notice when you take one apart is that the input shaft from the bell housing travels about 10in or more before theres the first bearing. The first bearing is on the opposite side of the front open diff and the small shafts that lead to the front axles. So all of the flexing from the diff and the front axles is placed on the one small bearing. Instead of using a bearing on both sides like other designs they only use a bearing on one side of it which would put alot of stress on the bearing since the input shaft has more leverage since it starts so far from the bearing. Then the initial gears are very tiny. Tiny in not only the teeth width but the actual total diameter of the gears themselves. If the casing had been more machined out on both sides of picture http://www.imagestation.com/picture/sraid28/p7d0e66a17b2ba032f2e225778dd7e2fd/fd652441.jpg then maybe they could have used a thicker toothed gear or maybe even one with a taller tooth to help spread out the surface area of it and spread out more of the lbs per square inch that they would be seeing under load. The front bearings could also be larger, more like the bearing towards the rear of the gears in the pic above. At least those are some observations. I'm trying to get the rebuild walkthrough completed in between packing up and moving back to the US so it might not be finished until I finish my move.

I see your point

I really look forward to your walkthrough. If you need any help that i might be able to provide shoot me a PM, I would be glad to help you with it.

Thanx for taking your time to explain this stuff to me.

~v6

I will host it, of course.

ahhh 6speed ahhhhhhhhhhh!!

i have been dumping my clutch and beating the hell out of my car for 23,xxx miles, and the tranny has been holding up just fine, i think its more the way people drive it then it having a "weak" tranny,

Thats exacty what I have been doing and saying and at 25,000 the tranny broke ON THE DYNO. ;)

Its just a matter of time.

- Alex

well, i think i just might have to get the sti 6 speed for sure.

Originally posted by Imprezer
Thats exacty what I have been doing and saying and at 25,000 the tranny broke ON THE DYNO. ;)

Its just a matter of time.

- Alex

Yep, what Alex said. Your view may change (Evil imports) once the tranny drops. Best of luck to you, it's your $. For me, I'll take a 2/10s hit at the track for a tranny that will last me past the first spark plug change.

/\rcanum

i wonder if i should wait until my tranny blows or just sell it while its in one piece.





nick
**post whoring master**

Originally posted by Imprezer
Thats exacty what I have been doing and saying and at 25,000 the tranny broke ON THE DYNO. ;)

Its just a matter of time.

- Alex

How much HP was it laying down tho? :)

~v6

FWIW, I went to my dealer about a month ago to :monkey: (couldnt find female dog pic) about tranny noise, shudder, etc. and they told me there will be a fix in 2 months, and they'll call me in. They took my VIN and documented stuff. When diagnosed by a tech he told me it could be one of the bearings in the tranny. I'm hoping to get at least new clutch and pressure plate for the shudder.
btw, i have 42k mi. and i never had these M/T prob's with 6 other cars before.

Keep us updated on what happens. I'd love to hear that they actually fixed it.

~v6

will do.

Well then as soon as I can get around to finishing it I'll attach it to an email and email it to you. It might not be until I've moved into a house in the US in Jan.

I might know first hand by then :D ;)

~v6

Well if you do go to have your M/T rebuilt you might want to consider finding a shop who's willing to let you sit in and watch how its done. Even if you don't learn enough to do it yourself the next time its still worth a look just to see how big a PITA it is.

Hopefully I wont need to :)

~v6

Its a Subaru so in time you will be sacrificing a paycheck to replace it or rebuild it. The blown gears in the pic came out to around $350 to replace. Thats for the gears and the synchros. Might as well do the synchros while we're at it.

i hope it does blow, then i can park the car till i have money to fix it, because its not even a year old and i have almost 24,xxx miles,

Originally posted by Evil imports
i hope it does blow, then i can park the car till i have money to fix it, because its not even a year old and i have almost 24,xxx miles,

Get a beater car!!!

330WHP on a dyno that shows 160WHP for a stock WRX.

- Alex

Originally posted by Imprezer
330WHP on a dyno that shows 160WHP for a stock WRX.

- Alex

well at that point ya gotta expect double the hp to have tranny problems, but i did dyno in my car at 216 hp at the wheels, and i believe there should be a tolerance for some power past stock. hopefully sti will be here shortly so 16 yr olds can get there parents to buy em it an then wreck it so i can get a sti trans

-mikey