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Old 10-16-2002, 11:33 PM   #1
opp
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Default why cant i shift @5500,6k rpm-Without a grind into 2nd?

why cant i shift @5500,6k rpm-Without a grind into 2nd?


Too fast - too hard ?? - cant see how they rally these things in the dirt when my tranny seems to be so sensitive...!!
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Old 10-17-2002, 01:12 AM   #2
PaulRex
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Explain your problem alittle more. Are you power shifting, are you letting off the gas when you are shifting? Does it grind in any other gear? Maybe you need tranny oil..

The shift into second from first is a wide ratio difference so it takes some getting used to.
Does this happen when downshifting as well as upshifting?

If it happens when your are downshifting, try to either shift faster, or wait for the rpms to drop(maybe your shifting to fast?) See if that changes anything. Or doubleclutch, your downshifts. If the problem persists and your car is stock, take it to the dealer and have them grind second gear. Also the tranny in your car is not designed or meant for rally racing, or prolonged usage in the dirt.
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Old 10-17-2002, 08:01 AM   #3
Legacy777
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Well......the technical reason is because the synchros have not had time to match speeds and allow for a correct gear change.

As to how to fix it. Two things come to mind, change your shifting technique or try some different kind of transmission gear fluid. Different oils will have different lubricating properties, which may help slow the synchros sooner so they can match speed.

If you have done nothing to the trans, and everything is bone stock, and it has always crunched, I highly suggest you change your shifting technique, as it's probably the culprit. Or take it to the dealer and have them look over it to see if anything is wrong.

The sure fire way would be let someone else drive it. If they don't get any grinding when shifting at same rpms, it's you. If they do.....it's possibly the car.

Josh
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Old 10-17-2002, 10:02 AM   #4
SnortWagon
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One other thing to consider - when I shift at high rpm from 1st to 2nd, I occasionally (happened 2 times in 10,000 miles) have lifted the accelerator pedal before depressing the clutch (only takes a fraction of a second). This has caused the transmission to load in the opposite way (using the engine compression for a braking effect), which causes the WRX transmission to shift a bit (stock transmission mounts are soft). Then, engaging second quickly and cleanly becomes pretty hard.

Just my .02.
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Old 10-17-2002, 10:43 AM   #5
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If you can deal with the minimal increases NVH(which i like), STI engine/tranny mounts do help shifting, and smooth the transition between on/off throttle.
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Old 10-17-2002, 11:15 AM   #6
opp
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Its gotta be me.... I seem to be shifting too fast syncros gotta be flying, does not grind when i keep clutch in longer= slower shift times............................................. .............

so how do you shift fast!!! or chirp 2nd,3rd,4th---
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Old 10-17-2002, 01:35 PM   #7
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another thing to try is to roll off your accelerator just before shifting up (start roll off around 6300rpm) even so, you will have to wait longer than say a honda for the flywheel to slow down and synchro's to do its job because the gear ratios are spread apart quite a bit...and you will probably never get any chirp since its awd (unless you wanna break your drive train powershifting into 2nd at 7000rpm or something, you might get a little chirp).

at wot in 1st gear, i usually wait until the rpm drops to around 4500rpm before engaging 2nd gear. you could slip 2nd gear from about 5500rpm's if you wanted to though.
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Old 10-18-2002, 01:16 PM   #8
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You can't shift fast, you have a synchromesh tranny, not a dogbox. These tranny's are not meant to shift fast, but gently and smoothly without rev-matching. They will shift fast if you double clutch and rev match, however, this take a long time on the upshift because of the heavy WRX flywheel and the wide ratio gearing. Don't force it, or you will bend your weak shift forks and risk extensive tranny damage that they won't warrenty.
__
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Old 10-18-2002, 06:38 PM   #9
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Quote:
Originally posted by opp

Its gotta be me.... I seem to be shifting too fast syncros gotta be flying, does not grind when i keep clutch in longer= slower shift times............................................. .............

so how do you shift fast!!! or chirp 2nd,3rd,4th---
Don't try to chirp 2nd or 3rd in a 4wd car, you'll just hurt the tranny. It's not like driving a 2wd.
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Old 10-18-2002, 10:57 PM   #10
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cool thanx for the info .// i will be easy on the subie,,

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Old 10-22-2002, 01:40 PM   #11
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If it is only happening in that one gear it is the tranmission. I have the same problem shifting into 5th gear at high rpm wether it is 4th to 5th at 4.5 rpm's or 3rd to 5th at same rpms... subaru is trying to get around the warranty though. Car is stock with the exception of rims and lower springs.
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Old 10-24-2002, 09:49 PM   #12
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me want dogbox
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Old 10-25-2002, 01:35 PM   #13
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Subaru said they would fix my stock car this one time only b/c of a faulty transmission.... as a good will gesture. this should not be a good will gesture since they put in a faulty transmission. Whatever this makes me want to mod the hell out of my car if they are not going to cover my warranty b/c of different rims and springs on the car. This will be my last subaru
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Old 10-27-2002, 07:19 PM   #14
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Ok, uh... what do you guys mean by "chirp"?


-paK
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Old 10-28-2002, 10:21 AM   #15
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Quote:
Originally posted by Pakin
Ok, uh... what do you guys mean by "chirp"?


-paK
Means you shift gears and the tires spin - or "chirp".

With 2wd this is taken as an indication that you made a good shift because you were able to apply so much power that you broke traction.

With 4wd it takes much more power to chirp the tires because their is more traction.

What's trick to grasp is that if the tires don't chirp because there is so much traction, then the transmission takes the full pounding
instead of having the energy dispersed by the tires slipping.
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Old 10-28-2002, 05:41 PM   #16
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You should never put more than two fingers worth of strength into a shift with syncros. Any more is *abuse*. There are two clutching actoins going on in every shift. Your foot clutch, and the syncros. Both take time, especially in the 1-2 shift on our trannys since the gear ratio is that different.

If you want a faster shift, get a lighter flywheel
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Old 10-28-2002, 06:05 PM   #17
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Mtb dube is right, with lighter pulleys and 12lb. Jun flywheel i HAVE to shift faster otherwise it thumps into gear, because the revs drop so fast.
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Old 11-03-2002, 04:30 AM   #18
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Quote:
Originally posted by jsarfaty
You can't shift fast, you have a synchromesh tranny, not a dogbox. These tranny's are not meant to shift fast, but gently and smoothly without rev-matching. They will shift fast if you double clutch and rev match, however, this take a long time on the upshift because of the heavy WRX flywheel and the wide ratio gearing. Don't force it, or you will bend your weak shift forks and risk extensive tranny damage that they won't warrenty.
__
Josh
Sorry for this newbie question... but what is a "dogbox"??

Thanks~
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Old 11-03-2002, 06:39 PM   #19
PaulRex
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An dogbox is an term for a transmission that uses straight cut gears.. Usually without synchos or any type of syncro mesh. Our transmissions use semi-helical cut gears or just helical cut gears IIRC and has sychros which enable us to (usually) change gears without double clutching, or rev matching etc.. With an dogbox you always have to rev match your shifts or it will grind. Also they are very loud, and have a tendency to whine. (Think of driving with the sound your car makes in reverse all the time)
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Old 11-05-2002, 08:29 PM   #20
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A dog box refers to the fact that there are no synchros, only dog teeth. You can have both a helical or straight cut dog box.

jb
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Old 11-05-2002, 11:52 PM   #21
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Hey thanks for the explaination... really helpful...
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Old 11-11-2002, 06:45 PM   #22
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we've experienced similar problems, NEO synthetic fluids are the way to go, NEO is located in Signal Hill, Ca, and, is the official fluid provider to the SWRT!!!! worked wonders for us, especially for downshifting to 1st gear!
Scott G.
the gravel crew
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Old 11-19-2002, 10:55 PM   #23
mynew02
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Default Re: fix

Quote:
Originally posted by Recce01
we've experienced similar problems, NEO synthetic fluids are the way to go, NEO is located in Signal Hill, Ca, and, is the official fluid provider to the SWRT!!!! worked wonders for us, especially for downshifting to 1st gear!
Scott G.
the gravel crew
What type of NEO oil did you use or ask for? ... or do they only sell one kind? What is their website?

-Jonathan
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Old 11-21-2002, 01:57 AM   #24
1WRX2NV
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Quote:
Originally posted by jsarfaty
You can't shift fast, you have a synchromesh tranny, not a dogbox. These tranny's are not meant to shift fast, but gently and smoothly without rev-matching. They will shift fast if you double clutch and rev match, however, this take a long time on the upshift because of the heavy WRX flywheel and the wide ratio gearing. Don't force it, or you will bend your weak shift forks and risk extensive tranny damage that they won't warrenty.
__
Josh
I shift fast........
Anyway there is supposed to be a "re-revised" clutch coming out in Feb. It sounds like it could be the clutch. My friend had this problem and he changed his clutch...it went away.

-freddie
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Old 11-21-2002, 02:04 AM   #25
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Quote:
Originally posted by Varanont
Subaru said they would fix my stock car this one time only b/c of a faulty transmission.... as a good will gesture. this should not be a good will gesture since they put in a faulty transmission. Whatever this makes me want to mod the hell out of my car if they are not going to cover my warranty b/c of different rims and springs on the car. This will be my last subaru
these guys are full of crap...each time it breaks they WILL have to replace it!! It doesn't matter about you're rims...ect......fools. Keep record of all work orders on youre tranny. If it happens 5 times....."lemon law". That suck that they would tell you such a thing.
Ford Motor Company tried to say the same thing to me.....thats why I won and got back $10,000.00

-freddie
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