GM 15067323 Transmission Assembly, Man (Nv3500)

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To remove the transmission, start by disconnecting the negative battery cable and removing the shift lever. Raise the vehicle and remove the driveshaft(s), parking brake cable, and any necessary exhaust components. On 4WD models, remove the skid plate and transfer case, and disconnect all electrical connectors. Disconnect the fuel lines and remove the clutch release cylinder or hydraulic line. Support the engine/transmission assembly with a jack and remove the transmission mount bolts, catalytic converter hanger, and support braces. Remove the cover plate from the clutch housing and secure the transmission to a jack. Remove the crossmember and transmission mount, and lower the engine/transmission assembly to detach the fuel line retaining clips. Remove the transmission-to-bell housing or transmission-to-engine bolts, and carefully slide the transmission out from under the vehicle. Inspect the clutch components and consider installing new ones. To install the transmission, first install the clutch components if necessary. Raise the transmission into position and slide it forward to engage the input shaft with the clutch plate hub. Install the transmission-to-engine or transmission-to-clutch housing bolts, and then install the crossmember and transmission mount. Remove the jacks supporting the transmission and engine, and reinstall any previously removed components. Verify all wires and hoses are reconnected and the transmission is filled with lubricant. Finally, connect the negative battery cable, road-test the vehicle, and check for leaks.

To remove the transmission, start by disconnecting the negative battery cable and removing the shift lever. Raise the vehicle and remove the driveshaft(s), parking brake cable, and any necessary exhaust components. On 4WD models, remove the skid plate and transfer case, and disconnect all electrical connectors. Disconnect the fuel lines and remove the clutch release cylinder or hydraulic line. Support the engine/transmission assembly with a jack and remove the transmission mount bolts, catalytic converter hanger, and support braces. Remove the cover plate from the clutch housing and secure the transmission to a jack. Remove the crossmember and transmission mount, and lower the engine/transmission assembly to detach the fuel line retaining clips. Remove the transmission-to-bell housing or transmission-to-engine bolts, and carefully slide the transmission out from under the vehicle. Inspect the clutch components and consider installing new ones. To install the transmission, first install the clutch components if necessary. Raise the transmission into position and slide it forward to engage the input shaft with the clutch plate hub. Install the transmission-to-engine or transmission-to-clutch housing bolts, and then install the crossmember and transmission mount. Remove the jacks supporting the transmission and engine, and reinstall any previously removed components. Verify all wires and hoses are reconnected and the transmission is filled with lubricant. Finally, connect the negative battery cable, road-test the vehicle, and check for leaks.

The steps for installing the transmission are as follows: Ensure the torque converter hub is securely engaged in the pump. Raise the transmission into position, keeping it level to prevent the torque converter from sliding out. Connect the transmission fluid cooler lines and align the marks on the torque converter and driveplate. Carefully move the transmission forward until the dowel pins engage with the holes in the bell housing. Install the transmission housing-to-engine bolts and tighten them securely. Install the drive plate-to-torque converter bolts and tighten them to the specified torque. Install the crossmember and remove the jacks supporting the transmission and engine. Install the dipstick tube, starter motor, and reconnect the shift linkage or cable. Plug in the transmission wire harness connectors and install the torque converter cover. If applicable, install the transfer case and driveshaft(s). Install any exhaust system components that were removed and lower the vehicle. Finally, fill the transmission with the specified fluid, run the engine, and check for fluid leaks.

Connect the negative battery cable, road-test the vehicle, and check for leaks to ensure a successful transmission installation.

On 1994 models, disconnect the shift linkage. On 1995 and later models, disconnect the shift cable.

Secure the torque converter to the transmission.

You should support the engine/transmission assembly with a jack. Then, remove the transmission mount bolts, catalytic converter hanger, and support braces.

On 1994 models, disconnect the shift linkage. On 1995 and later models, disconnect the shift cable.