4l80e rebuild for 2002 Yukon Swap, SLOWWWWW BUILD....
01-01-2016, 05:04 PM
#541
TECH Fanatic
Thread Starter
Actually I remember now that it wasn't working the first time.
01-02-2016, 01:29 PM
#543
TECH Fanatic
Thread Starter
I did a write entire, that was my goal at least. I'll post my tuning files, perhaps someone can verify I did in fact at least perform the segment swap?
So in the diagram, #18 or #29? Both?
(1) Input Shaft Seal
(2) Input Gear Bearing Outer Retaining Ring
(3) Adapter Stud
(4) Front Vehicle Speed Sensor
(5) Vent
(6) Clutch Lever Pivot Pin
(7) Front Case Half
(8) Location Pin
(8) Location Pin
(9) Input Gear Bearing
(10) Input Gear Bearing Retaining Ring
(11) Annulus Gear
(12) Annulus Gear Retaining Ring
(13) Clutch Lever Pivot Pin
(14) Front Output Shaft Bearing Retaining Ring
(15) Front Output Shaft Front Bearing
(16) Bracket
(17) Access Hole Plug
(18) Right Vehicle Speed Sensor
(19) Case Half Bolt
(20) Rear Bushing
(21) Rear Output Shaft Seal
(22) Fill Plug
(23) ID Tag
(24) ID Tag Screw
(25) Drain Plug
(26) Rear Case Half
(27) Front Output Shaft Rear Bearing
(28) Wear Clip
(29) Left Vehicle Speed Sensor
(30) Control Actuator Lever Bearing
(31) Control Actuator Lever Retaining Ring
(32) Encoder Motor Insulating Spacer
(33) Encoder Motor
(34) Encoder Motor Bolt
(35) Encoder Motor Location Pin
(36) Front Output Shaft Seal
(37) Front Output Shaft Bearing Retaining Ring
01-02-2016, 03:23 PM
#546
TECH Fanatic
Thread Starter
All 3 sensors checked.
Truck rear on jacks, front driveshaft removed, still no speedo. Hmmmm
Does the front end need to be rolling for the speedo to work? Any suggestions on what to check next?
Truck rear on jacks, front driveshaft removed, still no speedo. Hmmmm
Does the front end need to be rolling for the speedo to work? Any suggestions on what to check next?
01-02-2016, 03:46 PM
#547
TECH Fanatic
Thread Starter
Looks like p1860 can be triggered by p0502?
Circuit Description
The torque converter clutch (TCC) solenoid valve is a normally-open exhaust valve that is used with the torque converter clutch pulse width modulation (TCC PWM) solenoid valve in order to control fluid acting on the converter clutch apply valve. The TCC solenoid valve attaches to the transmission case assembly extending into the pump cover. When grounded, energized, by the powertrain control module (PCM), the TCC solenoid valve stops converter signal oil from exhausting. This causes converter signal oil pressure to increase and move the converter clutch apply valve against spring force and into the apply position. In this position, release fluid is open to an exhaust port and converter feed fluid fills the apply fluid circuit. The converter feed fluid applies the TCC. When the PCM no longer provides a ground path, the TCC solenoid valve de-energizes and apply fluid exhausts, releasing the TCC.
When the PCM detects low TCC slip speed when the TCC is commanded OFF, then DTC P0742 sets. DTC P0742 is a type B DTC.
Conditions for Running the DTC
No TP sensor DTCs P0122 or P0123.
No VSS assembly DTCs P0502 or P0503.
No TCC solenoid valve DTC P0740.
No TFP manual valve position switch DTC P1810.
No TCC PWM solenoid valve DTC P1860.
The TP angle is 17-45 percent.
The engine speed is greater than 450 RPM for 6 seconds.
The engine is not in fuel cutoff.
The TFT is between 20-130°C (68-266°F).
The engine vacuum is 0-105 kPa (0-15 psi).
The engine torque is 67-542 N·m (50-400 lb ft).
The engine speed is 1,000-3,000 RPM.
The speed ratio is 0.64 to 1.35.
The vehicle speed is 24-80 km/h (15-50 mph).
The gear range does not change within 5 seconds.
The commanded gear is not 1st.
The gear range is D4.
The TCC is commanded OFF.
Conditions for Setting the DTC
DTC P0742 sets if the following condition occurs twice.
The TCC slip speed is -20 to +20 RPM for 5 seconds.
Action Taken When the DTC Sets
The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
The PCM inhibits the TCC.
The PCM inhibits 4th gear in Hot Mode.
The PCM freezes shift adapts from being updated.
The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
The PCM stores DTC P0742 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.
http://www.silveradoss.com/forums/topic/10467-trans-code-scanned/
Circuit Description
The torque converter clutch (TCC) solenoid valve is a normally-open exhaust valve that is used with the torque converter clutch pulse width modulation (TCC PWM) solenoid valve in order to control fluid acting on the converter clutch apply valve. The TCC solenoid valve attaches to the transmission case assembly extending into the pump cover. When grounded, energized, by the powertrain control module (PCM), the TCC solenoid valve stops converter signal oil from exhausting. This causes converter signal oil pressure to increase and move the converter clutch apply valve against spring force and into the apply position. In this position, release fluid is open to an exhaust port and converter feed fluid fills the apply fluid circuit. The converter feed fluid applies the TCC. When the PCM no longer provides a ground path, the TCC solenoid valve de-energizes and apply fluid exhausts, releasing the TCC.
When the PCM detects low TCC slip speed when the TCC is commanded OFF, then DTC P0742 sets. DTC P0742 is a type B DTC.
Conditions for Running the DTC
No TP sensor DTCs P0122 or P0123.
No VSS assembly DTCs P0502 or P0503.
No TCC solenoid valve DTC P0740.
No TFP manual valve position switch DTC P1810.
No TCC PWM solenoid valve DTC P1860.
The TP angle is 17-45 percent.
The engine speed is greater than 450 RPM for 6 seconds.
The engine is not in fuel cutoff.
The TFT is between 20-130°C (68-266°F).
The engine vacuum is 0-105 kPa (0-15 psi).
The engine torque is 67-542 N·m (50-400 lb ft).
The engine speed is 1,000-3,000 RPM.
The speed ratio is 0.64 to 1.35.
The vehicle speed is 24-80 km/h (15-50 mph).
The gear range does not change within 5 seconds.
The commanded gear is not 1st.
The gear range is D4.
The TCC is commanded OFF.
Conditions for Setting the DTC
DTC P0742 sets if the following condition occurs twice.
The TCC slip speed is -20 to +20 RPM for 5 seconds.
Action Taken When the DTC Sets
The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
The PCM inhibits the TCC.
The PCM inhibits 4th gear in Hot Mode.
The PCM freezes shift adapts from being updated.
The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
The PCM stores DTC P0742 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.
http://www.silveradoss.com/forums/topic/10467-trans-code-scanned/
01-02-2016, 05:24 PM
#548
TECH Fanatic
Thread Starter
So on the vss harness I should test for ground? There wouldn't be any voltage as that's what the sensor is creating as a signal?
01-02-2016, 05:50 PM
#549
Having brain fart howmany wires are there on the vss connectors.... Atomic, your tcase is manual,correct??? Manual tcase only has one vss... Autotracs have 3 and they are all used for vss inputs iirc to monitor slip speed to engage/disengage the tcase....
