xB final drive swap thread - Page 3 - Toyota Yaris Forums

cali yaris · 10-25-2011, 01:14 PM

On the street, yes it's great. Drag racing, probably not.

ilikerice · 10-25-2011, 02:17 PM

LOL.. 2nd gear launch.. in a yaris.. ohh how i wish i were in your shoes

cali yaris · 10-25-2011, 04:32 PM

I'll try it out both ways on Thursday. Looks like we have a few people coming out.

fnkngrv · 10-25-2011, 05:18 PM

I can't recall what the RPM is at 70 with a stock final drive?

Yaristeve · 10-25-2011, 06:31 PM

Quote:

Originally Posted by fnkngrv

I can't recall what the RPM is at 70 with a stock final drive?

3000 rpm in my stock Yaris.

CrankyOldMan · 10-25-2011, 07:39 PM

Changing the 5th gear ratio from 0.815 to 0.725 puts the 70 mph RPM right around 3160. Not great, but closer to stock. The 5th gear is out of a C59 from an 03-ish Matrix/Vibe/Corolla. That particular C59 also has a 3.941 final drive, which is a little bit more aggressive without going whole hog. The thing that sucks about the C59 is that they normally run about $1.2k rebuilt, $600 broken.

CrankyOldMan · 10-30-2011, 02:59 PM

Ok, made some progress on my gear swap project. A C56 can indeed be torn down without the Toyota SST kit.

Important tools to have (or at least what I used):

* Bolt puller set
* Bearing separator set
* 3/8" drive breaker bar
* deadblow hammer

Replacing the bearings will require a few other automotive tools, but I haven't messed with that yet. Putting it back together is a very different story and will require access to a hydraulic press and either a very precise torque wrench (0-15 in-lb) or knowledge of the mechanics/physics/calculus to make a widget that will verify the pre-load torque on the differential.

cali yaris · 10-30-2011, 06:26 PM

I think Art used a 2-ton press. About $150 from Harbor Freight.

bzinn 1 · 11-01-2011, 02:54 PM

The guy I helped change the gears(he busted one on an xB) just got a press from Harbor Freight like Garm said.It was not easy,but it was cold and rainy and I had never taken apart a tranny before like this so I was just the helper.No need for special tools short of bearing separator and bolt outs,other than that is basic tools

Jason@SportsCar · 12-06-2011, 03:32 PM

Quote:

Originally Posted by CrankyOldMan

Pardon the tangent, but...

I prefer to keep all three decimal places to avoid confusion with similar ratios available on variants of the C5* line. Yes, I've spent entirely too much time researching this. =)

Yaris (non Vitz RS) C50:
1st 3.545:1
2nd 1.904:1
3rd 1.310:1
4th 0.969:1
5th 0.815:1
Final 3.722:1

Vitz RS C56 close ratio:
1st 3.166:1
2nd 1.904:1
3rd 1.392:1
4th 1.301:1
5th 0.815:1
Final 4.312:1

My dream Frankensaxle:
1st 3.166:1
2nd 1.904:1
3rd 1.392:1
4th 1.031:1
5th 0.725:1
Final 4.312:1

Why go through the trouble? Well, because I hate getting stuck below the power band in second gear. The redline speed of 1st is very close to the stock, but because of the taller ratio the drop is only about 2400 rpm to second--instead of 2900. A rev-limit shift would in theory land you just over 4k, right in the sweet spot of the stock/NA torque curve. The internal ratio of 2nd is the same for all C5* series gearboxes, and the drive gear is integrated into the input shaft. Can't change it without customizing the whole shaft. The benefit here is from the shorter final drive ratio, as well as the shorter ratios in 3rd/4th. Sure, you give up a ton of theoretical top end speed, but if you don't ever plan on driving over 100mph, you'll never know it's gone.

The super-tall overdrive ratio in 5th is to compensate for highway cruising. When driving like I stole it, I don't get up into 5th anyway.

Anyway, really looking forward to see how this mod changes your corner exit speeds!

And Garm has found yet another option: http://www.yarisworld.com/forums/sho...&postcount=898

It wont be "freeway friendly", but damn, it will get you there in a hurry.

cali yaris · 12-06-2011, 03:37 PM

ha, a unicorn indeed!

We have access to several final drives now.

plus the Kaaz 3-4-5 gear set as noted, which will be posted to our online store shortly. Not for the weak of heart!!

WOOT!

Jason@SportsCar · 12-06-2011, 03:54 PM

Quote:

Originally Posted by cali yaris

ha, a unicorn indeed!

We have access to several final drives now.

plus the Kaaz 3-4-5 gear set as noted, which will be posted to our online store shortly. Not for the weak of heart!!

WOOT!

Wait till Cranky starts running the numbers, his head should be spinning.

cali yaris · 12-06-2011, 05:00 PM

no kidding.

ok, so final drives: 3.7 stock, 4.0 (pricey), 4.2 (xB), 4.5 (pricey)

all to be posted to the store. The 4.2 xB one will be offered as a kit with the drive, ring gear and ring bolts. (Shims must be purchased separately)

ilikerice · 12-06-2011, 05:15 PM

impressive.. you guys are on it..

CrankyOldMan · 12-06-2011, 07:54 PM

Quote:

Originally Posted by Jason@SportsCar

It wont be "freeway friendly", but damn, it will get you there in a hurry.

Agreed. My spreadsheet shows it as almost 4200 RPM@70 mph!

Quote:

Originally Posted by Jason@SportsCar

Wait till Cranky starts running the numbers, his head should be spinning.

I'm drooling a little bit, and putting off some homework.

Quote:

Originally Posted by cali yaris

ok, so final drives: 3.7 stock, 4.0 (pricey), 4.2 (xB), 4.5 (pricey)

4.0 = the early < '03 C59 3.941:1? If so, that's from a 1st gen Matrix (I think).

4.5:1 = ??

There's also a TRD 4.733:1 from the Starlet/Truino that may or may not fit.

cali yaris · 12-06-2011, 08:43 PM

4.0 and 4.5 are brand new from Japan. [insert banana dance smiley here]

Flipper_1938 · 12-06-2011, 10:36 PM

So, did you try this out on a dragstrip? What was your E.T? How much did you trim off of your previous best time?

cali yaris · 12-07-2011, 12:01 AM

I swapped the xB final drive only, not the gear sets. Jason is putting the gear sets into their road course race cars, that's not drag racing.

I got 2 passes and broke my clutch 3 weeks ago. I'm going again on Thursday night this week. Hope to have some good results.

10-25-2011, 01:14 PM	#37
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	On the street, yes it's great. Drag racing, probably not. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

10-25-2011, 02:17 PM	#38
ilikerice Drives: 2010 black yaris Join Date: Oct 2010 Location: savannah, ga Posts: 2,868	LOL.. 2nd gear launch.. in a yaris.. ohh how i wish i were in your shoes __________________ -Derrick- "Racing is important to men who do it well. When you're racing... It's life. Anything that happens before or after, is just waiting."

10-25-2011, 04:32 PM	#39
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I'll try it out both ways on Thursday. Looks like we have a few people coming out. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

10-25-2011, 05:18 PM	#40
fnkngrv Mr. 155 and climbing View User's Garage Drives: Seriously Modded 07 Sedan Join Date: Jun 2006 Location: In The Hotbox Posts: 4,742	I can't recall what the RPM is at 70 with a stock final drive? __________________ Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing *Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes.*

10-30-2011, 06:26 PM	#44
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I think Art used a 2-ton press. About $150 from Harbor Freight. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

10-25-2011, 07:39 PM	#42
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,333	Changing the 5th gear ratio from 0.815 to 0.725 puts the 70 mph RPM right around 3160. Not great, but closer to stock. The 5th gear is out of a C59 from an 03-ish Matrix/Vibe/Corolla. That particular C59 also has a 3.941 final drive, which is a little bit more aggressive without going whole hog. The thing that sucks about the C59 is that they normally run about $1.2k rebuilt, $600 broken.

10-30-2011, 02:59 PM	#43
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,333	Ok, made some progress on my gear swap project. A C56 can indeed be torn down without the Toyota SST kit. Important tools to have (or at least what I used): * Bolt puller set * Bearing separator set * 3/8" drive breaker bar * deadblow hammer Replacing the bearings will require a few other automotive tools, but I haven't messed with that yet. Putting it back together is a very different story and will require access to a hydraulic press and either a very precise torque wrench (0-15 in-lb) or knowledge of the mechanics/physics/calculus to make a widget that will verify the pre-load torque on the differential.

11-01-2011, 02:54 PM	#45
bzinn 1 Drives: 2008 Yaris HB Join Date: Oct 2008 Location: University Place,WA Posts: 828	The guy I helped change the gears(he busted one on an xB) just got a press from Harbor Freight like Garm said.It was not easy,but it was cold and rainy and I had never taken apart a tranny before like this so I was just the helper.No need for special tools short of bearing separator and bolt outs,other than that is basic tools

12-06-2011, 03:37 PM	#47
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	ha, a unicorn indeed! We have access to several final drives now. plus the Kaaz 3-4-5 gear set as noted, which will be posted to our online store shortly. Not for the weak of heart!! WOOT! __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

12-06-2011, 05:00 PM	#49
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	no kidding. ok, so final drives: 3.7 stock, 4.0 (pricey), 4.2 (xB), 4.5 (pricey) all to be posted to the store. The 4.2 xB one will be offered as a kit with the drive, ring gear and ring bolts. (Shims must be purchased separately) __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

12-06-2011, 05:15 PM	#50
ilikerice Drives: 2010 black yaris Join Date: Oct 2010 Location: savannah, ga Posts: 2,868	impressive.. you guys are on it.. __________________ -Derrick- "Racing is important to men who do it well. When you're racing... It's life. Anything that happens before or after, is just waiting."

12-06-2011, 08:43 PM	#52
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	4.0 and 4.5 are brand new from Japan. [insert banana dance smiley here] __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

12-06-2011, 10:36 PM	#53
Flipper_1938 Drives: 2010 Yaris Sedan Join Date: Oct 2010 Location: Kentucky Posts: 529	So, did you try this out on a dragstrip? What was your E.T? How much did you trim off of your previous best time?

12-07-2011, 12:01 AM	#54
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I swapped the xB final drive only, not the gear sets. Jason is putting the gear sets into their road course race cars, that's not drag racing. I got 2 passes and broke my clutch 3 weeks ago. I'm going again on Thursday night this week. Hope to have some good results. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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