New_scooby_04

iTrader: (4)

http://www.youtube.com/watch?v=JXh4xf49hYk

craigo

iTrader: (1)

im to scared to put mine on r/r in case they break it... its been road mapped by andrew carr. estimated 330/330

sonic93

iTrader: (16)

Has any one stripped these boxes and got any evidence that they any better or not? Engine tuner would no I'm sure?

sonic93

iTrader: (16)

Anger that's A lot of power on a 5 speed lol how long it last any launches ?

Sprint Chief

They have, but it is very difficult to know. The "stronger" gearboxes certainly have different gearsets, with different subaru part numbers, and different prices.

To a first look, they clearly aren't the same (e.g. different ratios) but that doesn't mean they are stronger or not. I understand there aren't any obvious things that would make you stop and say, okay, those are stronger. But there are many ways to strengthen the gears that may not be obvious, changes to the tooth profile, changes to materials or hardening / treatments that don't necessarily stand out afterwards. You can call subaru up and ask them what processes they apply to different gearsets, but you won't get an answer

Probably the only way to check would be to buy some gearsets and then test them to destruction. Who wants a whip around to do that then

sonic93

iTrader: (16)

il test my 72 to destruction lol? see how long it lasts at 380 bhp . my car hasnt slipped since mapping but 1 slip she being changed. who s cheapest for exedy pink box and light weight flywheel?

TonyBurns

iTrader: (3)

Its not the bhp its the torque that kills them, as Sprint said, they vary, but they dont vary that much between the lot that one will do 300lbs and the other 400lbs, they will all be within a very close margin to eachother.
What dictates them breaking is what you should ask yourself, but most of those boxes have 100k miles on them, the "odd" crunch with a bad change and presto, broken, or if not, enough of a chunk off the cog to do damage over time.
The "ultimate" classic 5 speed gearset was meant to be the version 5/6 STI type RA's, it was "cryo" hardened (frozen in other words), how much better it made it is unknown, but you can only do so much with one design and similar materials.

Tony

Jay m A

iTrader: (2)

My v1 DCCD box lasted about 10k miles on 330/350 when I had a 257, quite a few trackdays, no launches. I got it rebuilt and did gentle miles whilst saving for a 6 speed.

I then sold it on and the next guy did about 60 miles at 330 Lbft and broke it

sonic93

iTrader: (16)

mine got 360 ft lb so il test it lol. mine done 83k kilometers whats that lol? 60 odd i think? no crunching in mine just bit of play rubber gone i think.

tony when u getting the type r out again?

Sprint Chief

v1s/v2s are very weak and all of them are prone to breakage at low output. Even mild mods can lead to failure in fairly short order.

More evidence regarding the significant differences between gearsets can be found here:
http://rallispec.com/new%20catalog_gc8JDM.pdf
A complete parts catalogue from the US for all classic JDM impreza bits. Gearsets are on pg 24. Note the difference between the gearset prices.

V4 type RA - $1700
v6 STi - $1110
v6 type RA - $1500

Note that cryo treatment and "microfinishing" is an aftermarket add on offered by Rallispec not an official Subaru process (nobody outside of Subaru knows what Subaru does AFAIK).

These differences are important though because if people can happily run 400bhp-450bhp on the right 5 speed gearbox, then that offers massive cost savings to people looking to build a classic with this power output. Swapping a 5 speed is WAY easier than swapping a 6 speed in plus some competitive events require cars to retain the original castings so this information is valuable. These differences are worth having but need more research to figure out fully.

sonic93

iTrader: (16)

sprint chief thats a very good write up . Il just see what happens keeping it at 380.
What car u got mate?

scoobygaz1

iTrader: (3)

Hi i`m running 444/425 in a classic with a 5 speed wrx 02 box, how do you like the sc40 sonic

Sprint Chief

STi 5 Type RA V-Ltd. Currently running a TD05-20g although may get an opportunity to bolt something a bit bigger for a short while, just to see what can be done on a budget

Kwik

iTrader: (10)

So apart from the obvious what is the main differences between the design and parts used inside a 6spd compared to the many variants of the 5?.

Harmz2011

iTrader: (1)

Not sure if this is any use to anyone?

http://www.gearhack.com/myink/ViewPa...ission%20Chart

joz8968

iTrader: (13)

20g @ 384/349 on my STi 5's std c.48k old "TY754...AAA" 'box. New CC Stage 2 clutch/API lightened OEM flywheel (c.1k miles on it). No launching.

So far so good - no horrible noises/graunching gears/synchros, etc.


But re. crunching gearshifts: I accidentally did just that the other day (tw@t!)... So am hoping upon hope that isn't the start of a snowball effect....

sonic93

iTrader: (16)

the sc40 brill love it the power delivery nice. see there a few of us running nice power on 5 speed s and mine def will be put through its places lol. time will tell