2004 Scion xB Gear Ratio's

Four Speed Automatic Transaxles

Trans: U340E
First: 2.847
Second: 1.552
Third: 1.000
Fourth: 0.700

Model Code: NCP31L-DHPNKA
Front Axle Ratio: 4.23

Five Speed Manual Transaxles

Trans: C50
First: 3.545
Second: 1.904
Third: 1.310
Fourth: 0.969
Fifth: 0.815

Model Code: NCP31L-DHMNKA
Front Axle Ratio: 4.31

SOURCE:
http://www.vibratesoftware.com/html_...4_Scion_xB.htm

ADVANCED 4 SPEED AUTO FOR SCION XB [1NZ-FE], ECHO SEDAN [1NZ-FE] & ECHO HATCH [2NZ-FE]

The Scion xB is offered with optional electronically controlled four-speed overdrive automatic transmission.

The Scion xB U340E transmission shares many advanced features with the U441E transmission in Echo Hatch from Australia.

The Scion xB U340E intermediate ratios and final drive ratio have been selected to match the higher torque of the 1.5 litre 1NZ-FE engine.

Toyota Echo Hatch has an optional state-of-the-art electronically controlled four-speed overdrive automatic transmission.

The Toyota U441E automatic transmission offers significant driveability, efficiency and comfort advantages.

It halves shift lag compared with a conventional automatic transmission to achieve improved response.

The U441E transmission has the efficiency advantages of a Ravigneaux-type planetary gear and the smoothness of electronic control.

The transmission also saves on weight and complexity.

The Ravigneaux planetary gear affects the shifting of all speeds using one set of planetary gears - compared with three in a conventional automatic.

Toyota has also adopted clutch-to-clutch pressure control, reducing the number of brakes from four to three and the number of one-way clutches from three to two.

The adoption of Toyota’s Super ECT electronic control gives Echo automatic models a range of additional features.

Features of the Automatic Transmission include:

* clutch-to-clutch pressure control, for the 3-4 and 4-3 shifts, to provide smoother shifting.

* a centrifugal fluid pressure cancelling mechanism in the C1 clutch, for the 4-3 and 4-2 changes. The new mechanism improves shift response and smoothness

* line-pressure optimal control, using a linear solenoid valve to match line pressure to engine torque. It promotes smooth shifting and optimises the workload on the U441E’s new, more compact and efficient oil pump.

* clutch pressure optimal control using a solenoid valve to minutely control the clutch pressure according to engine torque and driving conditions - for smoother shifting.

The combination of the centrifugal fluid pressure cancelling mechanism and clutch pressure optimal control provides smooth shifting and halves shift-lag time for improved response.

The U441E shares an ECU with the 1.3 litre 2NZ-FE engine.

The ECU uses input on engine speed, crankshaft angle, water temperature, throttle position, the neutral start switch, vehicle speed, input turbine speed, stop light switch (brake actuation), transmission fluid temperature and transmission control switch (overdrive switch) to provide optimum driveability.

Toyota’s ECT features include torque control during shifting (to minimise shift shock), N to D squat control and A/T shift lock (to minimise the possibility of incorrect operation of the automatic transaxle).

Text was adapted and edited from the following source:
http://www.pressroom.com.au/pressroo...echokit.htm#27

Scion Information

(xb only) offer additional brake control systems

C50 Gear Ratio
1st 3.545
2nd 1.904
3rd 1.310
4th 0.969
5th 0.815
R 3.250
Differential 4.312

Oil Capitivty 1.9 L(2 Quarts)
Oil Viscosity SAE 75W-90
Oil Grade API GL-4 or GL-5

U340E Specifications
1st 2.847
2nd 1.552
3rd 1.000
4th 0.700
R 2.343
Differential 4.157

Use of Offset Crankshaft

The 1NZ-FE's Offset Crankshaft design moves the center of the crankshaft's out of pistons direct line of travel. This reduces friction to improve performance and fuel economy.

SOURCE:
http://home.pacbell.net/psychors/scion.txt

:D RPM

 

good info, nice to know

 

Here's is another simple listing of some of the relative information that ties it into some real-world numbers:

 

Yeah Tom, windowtint pointed that out, but...

I'm no transmission guru, and as far as I know, the Echo has a different transmission compared the xA/xB. The Echo has the C150 transmission, while the xA/xB/Vitz RS have the C50 transmission. The gearing is the same, but the bellhousing is different.

I checked the service manuals... The Echo has the C150 while both the xA and xB have C50 transmissions. And to verify, I checked my xA and it has a C50.

Anyone want to back me up? WRAITH?

 

You appear to be correct Miko - the Scion xB Repair manual calls it a "C50" even though the dealer intro packet for the new line when it came out calls it a "C150" and claimed it was exclusive to the US Scion line.

I notice the final ratio with the auto in the first post shows both 4.157:1 and 4.23:1 - any idea which is correct?

(Not that it matters that much to most people - it's roughly a 50 RPM difference at 70 MPH.)

Thanks for the help!

 

LOL... Why fight it... People on here think they know better... I stopped ...

https://www.scionlife.com/forums/vie...91025&start=25

Thats the reason why this MAD scientist will not help any scion xa/xb owner out...

 

"Thats the reason why this MAD scientist
will not help any scion xa/xb owner out..."

Hmmmmmm...

Thanks.

 

......sometimes I think I understand.

 

came across this post, though old, i'll still help out a bit.

C50 on the xB and xA have an 8 bolt based design while the C150 is a weaker 6 bolt based design that was more meant and intended to be paired with the 2NZFE motor being it wasn't strong enough to need anything heavier while the C50 was used on the 1NZFE because it needed the extra strength. the extra 2 bolt based design gives for much more strength.

 

great info!