Tech Specs: xB Transmissions
09-01-2004, 09:45 PM
#1
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Tech Specs: xB Transmissions
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
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
12-31-2005, 06:03 AM
#3
Here's is another simple listing of some of the relative information that ties it into some real-world numbers:
Code:
====
(tire rev per mile) * (final ratio) * (top gear ratio) = (engine RPM at 60MPH)
For the stock xB automatic those numbers are:
880 * 4.15 * 0.70 = 2556.4 RPM
====
Just using the stock tire size, the differential ratio, and the top gear ratios of
the xB with manual or auto transmission I come out with these figures, plus
or minus maybe 10 RPM...
AUTOMATIC:
2560 RPM @ 60 MPH
2990 RPM @ 70 MPH
MANUAL:
3070 RPM @ 60 MPH
3580 RPM @ 70 MPH
====
Gear / Ratio C50 5MT U340E 4AT
1st 3.54:1 2.84:1
2nd 1.90:1 1.55:1
3rd 1.31:1 1.00:1
4th 0.96:1 0.70:1
5th 0.81:1 –
Reverse 3.25:1 2.34:1
Final Drive 4.31:1 4.15:1
Stock tire revolutions per mile = ~880 (Varies by tire make, size, wear, etc.)
The torque converter is a locking torque converter that locks (no slippage)
while cruising in either 3rd or 4th gear for highway efficiency.
(Information from Scion introduction dealer packet.)
====
12-31-2005, 06:51 AM
#4
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Join Date: Nov 2003
Location: Orlando, Florida
Posts: 3,525
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?
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?
12-31-2005, 07:52 AM
#5
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!
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!
01-01-2006, 06:47 AM
#6
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Join Date: Dec 2003
Location: Rowland Heights, California, USA
Posts: 231
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...
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...
01-08-2006, 05:41 AM
#8
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Join Date: Feb 2004
Location: You couldn't afford it.
Posts: 950
Originally Posted by Wraith
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...
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...
......sometimes I think I understand.
09-19-2007, 08:28 AM
#9
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Join Date: Nov 2006
Location: Tacoma, WA
Posts: 1,414
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.
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.
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