WTB: shorter yaris final drive

[speed1]

Originally Posted by Jeff@MicroImage

Yes, 4.6 is Kaaz. We can also get the 3,4,5 gears from Kaaz.

The TRD 4.7 is $1350 but is not a direct fit in the Vitz, it's made for the AE111 C-160 transmission. You will need to machine the housing and swap bearings to fit the TRD 4.7 which ends up costing more than getting the 4.6 from Kaaz.

From here
http://www.trdparts.jp/english/list_race-mis_ep.html
they can see trd 41201-AE061 4.7 final gear is bolt on c52,c56 transmission.
Now I know c54 trans on yaris but not sure on vitz too.
I know 4 sure my 2003 vitz old model fits same starlet turbo LSD.
EP82 Starlet turbo fits c52 trans.
Are u so sure my car (old model vitz) cannot go starlet gear set or final?
Are u so sure my gearbox housing easy fit kaaz ones?
Just not funny to buy something expensive they cannot fit

[Jeff@MicroImage]

Originally Posted by speed1

Are u so sure my car (old model vitz) cannot go starlet gear set or final?

This will not bolt in, it requires machining/clearancing the housing and replacing the carrier bearings.

Originally Posted by speed1

Are u so sure my gearbox housing easy fit kaaz ones?

Yes. The Kaaz 4.6 is made for our Yaris/Vitz/Echo Transmission.

Originally Posted by speed1

Just not funny to buy something expensive they cannot fit

I agree, so why take a chance?

[speed1]

Originally Posted by Jeff@MicroImage

This will not bolt in, it requires machining/clearancing the housing and replacing the carrier bearings.



Yes. The Kaaz 4.6 is made for our Yaris/Vitz/Echo Transmission.



I agree, so why take a chance?

Can help me understand if better kaaz 3rd 4th 5th or 4.6 final?
I mean 4.6 final than 4.3 shortens all gears and allows each gear to put more torque to ground and shift revs same as stock while 3rd 4th 5th shorten these 3 gears and change shift revs.
Then 1st e 2nd no quicker acceleration and 3rd, 4th, 5th probably miss part of torque band.
My top torque stock cams is at 4500rpm.
Kaaz close gear set when I shift to 3rd e 4th I'm at 5000 and
when to 5th I'm at 5500.
So where's gain with kaaz close gear set when I miss power band?
I mean at 5500 torque curve is going down quickly
not growing not standing.
Am I wrong?

[Jeff@MicroImage]

1'st and 2'nd Gears in the Yaris transmission are primary gears and cannot be replaced easily. It will be easier to swap a different transmission, maybe 6-speed or dogbox if you want much shorter gearing in all gears.

Choosing the final drive and gearset that best works for you will depend on what type of driving/racing you do. The 4.6FD with Kaaz 3/4/5 gears will lower your top speed and works great for smaller tracks, rally-cross, autocross and tight canyon roads.

If you drive on longer tracks, highway/autobahn a lot then the 4.3FD with Kaaz 3/4/5 may work better.

If you could only do one of the two mods, gears or final drive, the final drive would come first. It makes a more noticeable improvement, is easier to install and less expensive.

Also, do not forget to add the Kaaz LSD to your budget, this will be the perfect time to install one.



Kaaz Final drive:

http://www.track-star.net/wp-content...inal-drive.jpg

Kaaz 3/4/5 gears:

[speed1]

Originally Posted by Jeff@MicroImage

1'st and 2'nd Gears in the Yaris transmission are primary gears and cannot be replaced easily. It will be easier to swap a different transmission, maybe 6-speed or dogbox if you want much shorter gearing in all gears.

Choosing the final drive and gearset that best works for you will depend on what type of driving/racing you do. The 4.6FD with Kaaz 3/4/5 gears will lower your top speed and works great for smaller tracks, rally-cross, autocross and tight canyon roads.

If you drive on longer tracks, highway/autobahn a lot then the 4.3FD with Kaaz 3/4/5 may work better.

If you could only do one of the two mods, gears or final drive, the final drive would come first. It makes a more noticeable improvement, is easier to install and less expensive.

Also, do not forget to add the Kaaz LSD to your budget, this will be the perfect time to install one.



Kaaz Final drive:

http://www.track-star.net/wp-content...inal-drive.jpg

Kaaz 3/4/5 gears:

Please,
4.6 install easier than 3 4 5 close?
Quicker acceleration with kaaz final or 3 4 5 set?
Maybe shortening 1st gear I suffer more wheel spin at launch?
Lsd suggested to improve traction?
I don't do autocross.
City drive, once a year highway, trackday at Magione Umbria Circuit
0.4 miles main straight.
From my data 6mph more with 4.6 than 3.4.5 close.
Not a difference.
Price alike.
Same work expense to me.
Still I don't understand which one allows more and quicker acceleration.
By your words it seems to be 4.6
then 3 4 5 only for long roads, finally best all together.
If I had 3 wheels I'd be barrow.. typical italian humour.
Seriously I don't like stock 4th length.
kaaz 3 4 5 closes all five gears.
Please tell me if 4.6 quicker than 3 4 5 close.
Or don't 3 4 5 make car quicker but only less speedy?
Thank u.

[Jeff@MicroImage]

Originally Posted by speed1

Please,
4.6 install easier than 3 4 5 close?

Yes, but if you can do one, you can do both.

Originally Posted by speed1

Quicker acceleration with kaaz final or 3 4 5 set?

Quicker in all gears with final drive. Only quicker in 3,4,5 with gearset.

Originally Posted by speed1

Maybe shortening 1st gear I suffer more wheel spin at launch?

Yes, this may happen, you can launch in 2'nd if needed. The LSD will help with this also.

Originally Posted by speed1

Lsd suggested to improve traction?

Yes, this is strongly recommended!

Originally Posted by speed1

I don't do autocross.
City drive, once a year highway, trackday at Magione Umbria Circuit
0.4 miles main straight.
From my data 6mph more with 4.6 than 3.4.5 close.
Not a difference.
Price alike.
Same work expense to me.
Still I don't understand which one allows more and quicker acceleration.
By your words it seems to be 4.6
then 3 4 5 only for long roads, finally best all together.
If I had 3 wheels I'd be barrow.. typical italian humour.
Seriously I don't like stock 4th length.
kaaz 3 4 5 closes all five gears.
Please tell me if 4.6 quicker than 3 4 5 close.
Or don't 3 4 5 make car quicker but only less speedy?
Thank u.

Based on your description of your driving I would go with either:

1. Only 4.6 FD with Kaaz LSD

or

2. 4.3 FD and 3,4,5 gearset and Kaaz LSD

The 4.6 may be exactly what you're looking for and should be a very nice improvement. The 4.6 will be more noticeable in all gears.

[speed1]

I see on kaaz site there's short gear set for 6 gear C60. Is it possible to take 1st to 5th and install to C56? Some matter using with C56 shafts? Maybe case work needed? Thank u man.

[CrankyOldMan]

Originally Posted by speed1

I see on kaaz site there's short gear set for 6 gear C60. Is it possible to take 1st to 5th and install to C56? Some matter using with C56 shafts? Maybe case work needed? Thank u man.

The C60 won't fit: the 6th gear makes the cover for the gearbox too long and requires cutting and welding the frame. Not an easy mod.

So you propose putting the gears from a C50 (Yaris) into a C56, or the other way around? I'm working on a gearbox that has parts from a C50, C56 and C59. It seems to go together, but I haven't tried setting the bearing pre-load on the differential. http://www.yarisworld.com/forums/sho...d.php?p=700882

[speed1]

my 2003 japanese vitz rs (echo hatch in US) has kaaz 1zz gear set + final. It should be C56. I had to instal kaaz shafts and 1zz diff to fit final e 1zz hub to fit 3rd e 4td.
It should be C56. Trd made, now discontinued, same close gears for C52 4age black and C56 4age silver if I'm not wrong. Trd gear set is same as celica kaaz from 1st to 5th. This is why I wonder I can swap onto my gearbox. I'm not sure, only I wonder. Maybe u know.