Fixed Rear Bias?

[Michael Blue]

Is there a system out there yet for going to a 90/10 to 70/30 rear-bias setup?
My center clutch pack is nearly done, and I'm considering the manual swap anyways, so what are my options?
I want a mostly rear bias, and not having the system shift bias around is better, but some limited bias shifting is OK, as long as it remains heavily rear biased at all times.

Thanks!

[GreenMarine]

Manual swap would give you the best "driving experience"... Hoewver, if you want to stay "automatic" then source a JDM auto tranny (tranny, rear diff and TCU) from either Japan or Australia or Europe... I hear those SVXi are fun to drive

[mbtoloczko]

Just to follow up on Chris' post... the JDM SVX 4eat is 36f/64r biased. All the manual trannys are 50:50 biased, except for the STi DCCD trannys. The DCCD manual trannys have an adjustable f/r bias.

[Michael Blue]

Originally Posted by mbtoloczko

The DCCD manual trannys have an adjustable f/r bias.

More info?

Thanks!

[mbtoloczko]

DCCD = driver controlled center diff

The f/r bias can be adjusted from 50f/50r to 36f/64r. There is a control module that goes with the tranny. DCCD trannys and control modules are notariously expensive. JDM STi DCCD 5MTs + control modules are probably around $3000-$4000, and the 6MT DCCD 6MTs + control modules usually go for $6000-$7000.

[Michael Blue]

Originally Posted by mbtoloczko

DCCD = driver controlled center diff

The f/r bias can be adjusted from 50f/50r to 36f/64r. There is a control module that goes with the tranny. DCCD trannys and control modules are notariously expensive. JDM STi DCCD 5MTs + control modules are probably around $3000-$4000, and the 6MT DCCD 6MTs + control modules usually go for $6000-$7000.

So a JDM SVX 4EAT would give me the same bias as the maximum on the manual DCCD? Hmm...interesting. I can't decide if I want manual or not. The other car(s) will mostly be manual, so it would be nice to have one auto around...

[oab_au]

Originally Posted by mbtoloczko

DCCD = driver controlled center diff

The f/r bias can be adjusted from 50f/50r to 36f/64r. There is a control module that goes with the tranny. DCCD trannys and control modules are notariously expensive. JDM STi DCCD 5MTs + control modules are probably around $3000-$4000, and the 6MT DCCD 6MTs + control modules usually go for $6000-$7000.

Hi mate this type of control is really just for off road rally work. The control just tightens the limited slip clutch. On the road with full traction on all wheels, the both sides of the clutch are running at the same speed, so it does not matter how much pressure is applied to the clutch, it stays at the same torque split. Just produces binding, in curves.

It is only on the dirt, when the wheels are having traction problems that tightening the LSC will change the torque split. As both sides of the clutch are running at different speeds, like the wheels.

Harvey.

[mbtoloczko]

Hi Harvey. Yes, you are right, in manual mode, the DCCD will cause some binding issues during cornering if the clutch is set to full tight. In auto-mode, the DCCD module will vary the clutch action according to several sensor inputs (g-forces, wheel slip, throttle position, and probably more). If those sensors could be enabled, then it would be a more useful device for the street.

[Jnthn_Sctt]

Originally Posted by GreenMarineSVX

Manual swap would give you the best "driving experience"... Hoewver, if you want to stay "automatic" then source a JDM auto tranny (tranny, rear diff and TCU) from either Japan or Australia or Europe... I hear those SVXi are fun to drive

Ok, so how much to source a JDM tranny? (Or are one of the others better?) Are they direct bolt ups? If this is the case, I may get the JDM tranny and have it drop shipped to Level Ten on the way here!!


Jonathan

[mbtoloczko]

Originally Posted by Jnthn_Sctt

Ok, so how much to source a JDM tranny? (Or are one of the others better?) Are they direct bolt ups? If this is the case, I may get the JDM tranny and have it drop shipped to Level Ten on the way here!!


Jonathan

I priced it out earlier this year. Figure about $1500-$2000 for the tranny, TCU, and rear diff. Shipping would be about $750. Worst part is that there is no guarantee that the tranny is going to last any length of time.

[SilverSpear]

how much for this DCCD alone? any pics of it?

[Jnthn_Sctt]

Originally Posted by mbtoloczko

I priced it out earlier this year. Figure about $1500-$2000 for the tranny, TCU, and rear diff. Shipping would be about $750. Worst part is that there is no guarantee that the tranny is going to last any length of time.

I figured that's why I'd drop it at Level10 first. Are the gear ratios the same? What about final drive? Is the 4.44 available in the JDM market?

Thanks,
Jonathan

[oab_au]

Originally Posted by SilverSpear

how much for this DCCD alone? any pics of it?

You don't need it Danny, you allready have the automatiic version in yours.

Harvey.

[oab_au]

Originally Posted by Jnthn_Sctt

I figured that's why I'd drop it at Level10 first. Are the gear ratios the same? What about final drive? Is the 4.44 available in the JDM market?

Thanks,
Jonathan

The ratios are the same. They only came with 3.7:1 final drive ratio.

Harvey.

[SilverSpear]

Originally Posted by oab_au

You don't need it Danny, you allready have the automatiic version in yours.

Harvey.

but what if i do my 6mt??? do i still have this ratio, furthermore, it's fun to change the wheels division..