Rice Rocket..

Why do people use the TDo5 if it breaks the gearboxes like what people say or is it all how you drive it.

I use my scoob everyday and planning on a TDo5, nothing fancy just abit more power would be nice.

Thanks

Ricey

scooby_matt

I've just had a TD05 fitted to my MY00 uk. Now running 320 bhp and 315 lb torque (which I gather is the bit that breaks the gearboxes).
I don't drive the car hard all the time like some do so hopefully the box should last.
It's like anything though, if you keep giving it loads of abuse, it's going to break eventually. Look after it with regaular oil changes and stuff and it should last as long as it's going to last.

Well worth doing though, the car pulls like a train all way round the clock now....when I do tickle it a bit

New_scooby_04

iTrader: (4)

I don't think it breaks gearboxes per se, I think its more of a case that it gives you scope for tuning to levels where torque is such that gearbox durablility is an issue. If you're brutal enough with the gearbox with a Td04 you could wreck it.

Ns04

john banks

There are numerous cases of people who've just fitted TD05s saying that they will treat their gearbox nice and it won't be a problem. Then we usually hear from them again if their cars are pre 2003. There is rumour/evidence that in 2003 at least on US models that the gears were changed to the same width as the old V5/6 Type R gear widths and are a bit stronger. 01/02 WRX may or may not be stronger than 99/00 Turbo boxes. Take your chances... but with the right bits on a standard engine you can run a TD05 at 25 PSI in the midrange and I would expect the engine to easily outlast the gearbox. At 22 PSI, mine lasted a week on a TD05, I had a weaker VF turbo on before that, but it wasn't as torquey as it tended to explode when boosted hard.

scooby_matt

Don't get me wrong, I do expect my gearbox to go in the future, but good maintenace can't do it any harm in the meantime

911

All a bit of a lottery i think.

my Sti v3 trans is in it's 4th season of 3000 miles a year and serious greif hill climbing with 5000+ rpm dump-the-clutch starts with sticky tyres and a good clutch.
Engine has RR'd @ 407 x 360 lbft and 380 bhp x 340 lbft and it is running great (taking a risk stating that!).
Running a 20g with a few other tweeks.

Graham.

john banks

It is not just a lottery but your good management by buying an STI (at least if the V3/4 boxes are stronger like the V5/6 on STIs).

No harm in good maintenance Matt. Shock loads undoubtedly contribute as well as actual torque, but slow gearchanges in sympathy to a lot of torque can also put you back where you started performance wise as I found out when I took a 2.5 car with over 100 BHP more than a 2.0 car and couldn't get away from it at sensible speeds because he was changing gear so much faster and had less lag between changes.

scooby_matt

Just out of interest, what's a ball park figure for a new gearbox (uprated to one that can take some stick), with fitting and setup etc?

And do you need to look into things like different ration diff's etc?

Rice Rocket..

Maybe I'm just thick, so it really the case of changing your oils and have slow gear changes along with abit of common sense i your riving then?

Would uprated g/box mounts help to stop any twisting etc?

Ricey

john banks

About £1800 for a used 6 speed with propshaft and linkage, plus whatever you do with the clutch - eg organic £350.

About £3000 once you've built a PPG 5 speed kit.

scooby_matt

Sorry john, no really clued up with these thing. What's a PPG?

Rice Rocket..

Good question Matt

RR

mista weava

i had a box last over a year at raised boost pressures. when i ran about 1.6bar the box, which was on its last legs did not go much longer. i drove the car HARD, so its a gamble some people ***** around in their cars at increased boost pressures with a td05 and the box falls to bits in no time. soem (like me) treat 'em rough and they last a long time.

it boils down to the fact that (esp the early boxes) the gear boxes on imprezas are inherently weak. the turbos on the other hand are quite the opposite. they are very responsive to tuning, esp if you convert to straight entry.

as mentioned earlier, its not the turbo that breaks the gearbox, its the level of torque the engine is capable of channeling to the transmission as a result of the increased performance on tap, with the td05.

even if there was not a td05 option on a scoob and the td04 or IHI turbos were the only std options, people would still change to hybrid units that would "break" the transmission.

mista weava

my car was a my93wrx btw.

Silver Scooby Sport

iTrader: (15)

Sorry to interupt the conversation gents but I could do with a word with John Banks..... John I see you have you pm function off, is there a way I could send you a quick e-mail maybe... I just have a small query to ask you. I think you should be able to mail me through my profile if that will be conveinient with you.

Regards
Simon

cookstar

iTrader: (6)

I blew my 02 WRX box on a TD04

scooby_matt

What were the symptoms of the box failing...I've got paranoia now creaping in about my 2nd gear

WRX_Rich

iTrader: (5)

i ve been pushing 320ft lbs for the last year and its still in one peice but I am waiting for it to go pop

probably in the rain, probably on the way to something important... we all know how it is

cookstar

iTrader: (6)

Really badly launched, with a brand new exedy clutch

My fault

scooby_matt

Sorry mate, I was wondering what made you aware the box was faulty, were you just unable to get a gear or was it grinding or was the car just going nowhere when in gear?

Danny Boy

iTrader: (2)

scooby_matt
PPG is a company in australia specialising in performance transmissions.
All you need to know about the PPG gear kit is here:
http://bbs.scoobynet.co.uk/showthread.php?t=477846

Paul at Zen performance is the official Uk importer.

scooby_matt

Nice one, cheers mate

911

Think you will find it is 3rd that lets go due to a good torque level.

Damage to 1st/2nd down to spirited driving/poor clutch/shift co-ordination

PPG's seem to be a 5 speed answer to bullit proof box.
Graham.

rigga

iTrader: (4)

just purchased a converted TD05 for my my00 jap spec wagon,but as my expectations are for only just over the 300 mark im hoping it wont put too much strain on the box....i drive like a fanny anyway so should be fine...lol

scooby_matt

It seems to be fine, just a pig to get in gear when the car's been sat overnight

911

My X type Jag does that.
First few changes are very heavy, then all is well.
Oil runs out of synchro cups over a long period of time.
Graham

scooby_matt

That's good enough for me!

cookstar

iTrader: (6)

There was a rattly kind of noise for quite some time, i drove for quite a while like this too, the best way to describe it is like those kiddies pretend machine guns (but quieter) then one time just pulling off the lights BIG BANG no gears


AA lorry

Aztec Performance Ltd

iTrader: (234)

As JB says, little value in having putting on a TD05 and making slower progress than the std turbo.

Anyone who decides to fit a TD05 (particularly those running non sti boxes)and use it to its potential should budget for a uprated gearbox@ £2000-3000.

Mine didnt last very long with a TD05 and I was kidding myself thinking that the gearbox wasnt too much of a concern - 'maybe fit a cheap replacement box' turned to 'cant be bothered to keep changing the boxes and driving knowing that the box could give at any time' ---&---'a 5 speed STi box isnt much extra, I'll do that' turned to 'unconvinced it would be a worthwhile enough upgrade and still not cheap'.

Worth adding up the real cost before going the TD05 route.


Bob

Rice Rocket..

hmm, looks like i might have to change my tuning plans, don't want to replace my g'box. What other turbo could be used then, that won't f&&kup up g'box but give you decent power?

RR