Please help!

[kdog]

Well Guys, I am almost ready to get my truck back from its recent conversion and I may have another snag. I have had my wiring guy also make my 4x4 wiring harness. (I swapped in the 2004 transfercase along with the rest of the 2004 drivetrain.)

Here is the trouble. The harness that I finally received after a two month wait has connectors for Speed sensors for the front and rear driveshafts but my particular T-case had those speed sensor holes plugged up at the factory. They are not there. I am worried that the harness was made for the wrong t-case as they used a wiring diagram for a 2004 K truck. Is there another wiring diagram for my application that someone could share with me? My T-case appears to be the NP1 according to a print out that I have

The donor was a 2004 K2500 HD built on Jan 22, 2004 Vin is 1GCHK29U94E253034.

Does anyone know why GM plugged the holes on this T-case and whether my harness will work minus speed sensors or what I need to do?

Many , Many thanks!

[71chevy]

I am not sure about your transmission but this is some information that I got about using a speed sensor on the dif. yoke. Go to this website and check out the VSS kit they have for 4X4's and Chevy trucks.
http://www.jagsthatrun.com/Pages/Parts_S10...uctor-Diff.html

You should also be able to order everything from this sight that you will need. Or you can try from other sites using those part numbers.

[airdeano]

<div class='quotetop'>QUOTE(kdog &#064; May 29 2007, 09&#58;34 AM) [snapback]95042[/snapback]</div>

Well Guys, I am almost ready to get my truck back from its recent conversion and I may have another snag. I have had my wiring guy also make my 4x4 wiring harness. (I swapped in the 2004 transfercase along with the rest of the 2004 drivetrain.)

Here is the trouble. The harness that I finally received after a two month wait has connectors for Speed sensors for the front and rear driveshafts but my particular T-case had those speed sensor holes plugged up at the factory. They are not there. I am worried that the harness was made for the wrong t-case as they used a wiring diagram for a 2004 K truck. Is there another wiring diagram for my application that someone could share with me? My T-case appears to be the NP1 according to a print out that I have

The donor was a 2004 K2500 HD built on Jan 22, 2004 Vin is 1GCHK29U94E253034.

Does anyone know why GM plugged the holes on this T-case and whether my harness will work minus speed sensors or what I need to do?

Many , Many thanks&#33;
[/b]

on 80e trans they use an input shaft speed sensor (ISS 80/85e only) and the output shaft speed
sensor (OSS or VSS 60 and 80e use) on 4wd applications the VSS is located on the transfer case.
which transfer case setup do you have?

Transfer Case - NVG 246-NP8 RPO
The New Venture Gear model NVG 246 RPO NP8 transfer case is a two speed automatic, active, transfer case. The NVG 246 EAU provides 5 modes, Auto 4WD, 4HI, 4LO, 2HI and Neutral. The Auto 4WD position allows the capability of an active transfer case, which provides the benefits of on-demand torque biasing wet clutch and easy vehicle tuning through software calibrations. The software calibrations allow more features such as flexible adapt ready position and clutch preload torque levels. The technology allows for vehicle speed dependent clutch torque levels to enhance the performance of the system. For example, the system is calibrated to provide 0-5 ft lb of clutch torque during low speed, low engine torque operation, and predetermined higher torque for 40 km/h (25 mph) and greater. This prevents crow-hop and binding at low speeds and provides higher torque biases at higher vehicle speeds, in order to enhance stability.

Transfer Case - NVG 261-NP2 RPO
The New Venture Gear (NVG) 261, RPO NP2 transfer case is a two-speed, part-time with "mode shift-on-the-fly" capability. It has a chain driven front output shaft and an epicyclical low range planetary arrangement. The NVG 261 transfer case features a four position shift lever control located in the vehicle floor plan. As required, the operator can select 4HI position from 2HI "on-the-fly," as described in the owners manual. A dash 4WD lamp continues flashing during shifting, until all criteria have been met and the new mode/range position has been reached. Once the new mode/range position is fully engaged and the front axle disconnect locks in, the dash light 4WD indicator lamp remains ON constantly. Range shifting functions similarly, although it should be limited to speeds 5 km/h (3 mph) or less.

Transfer Case - NVG 263-NP1 RPO
The NVG 263 transfer case features a three button shift control switch located on the instrument panel. When the ignition is in the RUN position, the transfer case shift control module (TCCM) starts monitoring the transfer case shift control switch to determine if the driver desires a new mode/gear position. At a single press of the transfer case shift control switch, the lamp of the new desired position begins flashing to inform the driver that the TCCM has received the request for a new mode/gear position. The lamp continues to flash until all shifting criteria has been met and the new mode/gear position has been engaged. Once the new mode/gear position is fully active, the switch indicator for the new position remains ON constantly. In the event that the TCCM can not or will not complete the shift, the indicator returns to the previously selected position; this is a Transfer Case Shift Control Switch Indicator Flashes, then Returns to Previous Mode condition.

as far as function, the trans will not shift without the VSS and/or ISS signal. the t-case signal
will correct the speed output when engauged.

airdeano

[kdog]

<div class='quotetop'>QUOTE(airdeano &#064; Jun 2 2007, 11&#58;58 AM) [snapback]95495[/snapback]</div>

on 80e trans they use an input shaft speed sensor (ISS 80/85e only) and the output shaft speed
sensor (OSS or VSS 60 and 80e use) on 4wd applications the VSS is located on the transfer case.
which transfer case setup do you have?

Transfer Case - NVG 246-NP8 RPO
The New Venture Gear model NVG 246 RPO NP8 transfer case is a two speed automatic, active, transfer case. The NVG 246 EAU provides 5 modes, Auto 4WD, 4HI, 4LO, 2HI and Neutral. The Auto 4WD position allows the capability of an active transfer case, which provides the benefits of on-demand torque biasing wet clutch and easy vehicle tuning through software calibrations. The software calibrations allow more features such as flexible adapt ready position and clutch preload torque levels. The technology allows for vehicle speed dependent clutch torque levels to enhance the performance of the system. For example, the system is calibrated to provide 0-5 ft lb of clutch torque during low speed, low engine torque operation, and predetermined higher torque for 40 km/h (25 mph) and greater. This prevents crow-hop and binding at low speeds and provides higher torque biases at higher vehicle speeds, in order to enhance stability.

Transfer Case - NVG 261-NP2 RPO
The New Venture Gear (NVG) 261, RPO NP2 transfer case is a two-speed, part-time with "mode shift-on-the-fly" capability. It has a chain driven front output shaft and an epicyclical low range planetary arrangement. The NVG 261 transfer case features a four position shift lever control located in the vehicle floor plan. As required, the operator can select 4HI position from 2HI "on-the-fly," as described in the owners manual. A dash 4WD lamp continues flashing during shifting, until all criteria have been met and the new mode/range position has been reached. Once the new mode/range position is fully engaged and the front axle disconnect locks in, the dash light 4WD indicator lamp remains ON constantly. Range shifting functions similarly, although it should be limited to speeds 5 km/h (3 mph) or less.

Transfer Case - NVG 263-NP1 RPO
The NVG 263 transfer case features a three button shift control switch located on the instrument panel. When the ignition is in the RUN position, the transfer case shift control module (TCCM) starts monitoring the transfer case shift control switch to determine if the driver desires a new mode/gear position. At a single press of the transfer case shift control switch, the lamp of the new desired position begins flashing to inform the driver that the TCCM has received the request for a new mode/gear position. The lamp continues to flash until all shifting criteria has been met and the new mode/gear position has been engaged. Once the new mode/gear position is fully active, the switch indicator for the new position remains ON constantly. In the event that the TCCM can not or will not complete the shift, the indicator returns to the previously selected position; this is a Transfer Case Shift Control Switch Indicator Flashes, then Returns to Previous Mode condition.

as far as function, the trans will not shift without the VSS and/or ISS signal. the t-case signal
will correct the speed output when engauged.

airdeano
[/b]

I have the last one. I also have a posi lock for my front actuator. It looks like I simply need to eliminate the extra speed sensors and get the correct shift module. I am wondering though based on this write up. do I have to pull my posi-lock into position first and then the push button will work or will I be able to shift into 4wd without having the electronic actuator up front. I when with the posi lock to eliminate the chance of the actuator failing.

Thanks