GMC 24284716 Transmission Asm,Man

Changing a manual transmission can by and of itself be a do it yourselfer's nightmare in that as mentioned above many small parts need to be removed and replaced and the clearances have to be measured and in most cars, when these clearances are not correct, select fit spacers and snap rings are used. Though, a competent do-ityourselfer can do the removal and installment if arises, the overhaul is better left to a transmission repair shop since undertaking it times and costs more compared to a rebuilt type, which can be sourced from dealer's parts and auto part stores. A novice can rebuild a transmission if he/she has the right special tools, and plans the job in a step by step manner so as not to miss any step. Some of the tools that recommend themselves during the overhaul are the internal and external snap ring plier, the bearing puller, the slide hammer, the set of pin punches, the dial indicator and hydraulic press, the big and solid working bench and the vise or the transmission stand. It is especially important to document disassembly, including how a particular part was taken out and the orientation and methods of joining of that part to the others. Another way in which it is possible to get an understanding of specific issues is to have an understanding of a particular malfunctioning area of the transmission before disassembly has been accomplished, because this also makes certain issues more distinct during the examination and replacement of components.

To remove the transmission, first disconnect the negative cable from the battery. Shift the transmission into Neutral and remove the shift lever. Raise the vehicle sufficiently to provide clearance for the transmission removal, ensuring it is securely supported on jackstands. If equipped, remove the skid plate and disconnect the electrical connectors from the transmission and the oxygen sensor connectors. If the transmission will be disassembled, drain the lubricant. Remove the driveshaft, using a plastic bag to cover the end of the transmission to prevent fluid loss and contamination. For 4WD models, remove the shift cable and vent hose from the transfer case. Disconnect the clutch hydraulic line at the bellhousing, using a special tool to push back the quick-connect line, noting that the hydraulic line has check-balls inside, eliminating the need to plug it once disconnected. Support the engine from above with an engine hoist or place a jack under the engine oil pan, ensuring the engine remains supported while the transmission is out. Support the transmission with a jack, preferably one designed for this purpose, and use safety chains to steady it. Remove the mounting nuts for the fuel lines attached to the transmission, then remove the exhaust pipe and hanger from the transmission crossmember. Remove the transmission mount nuts from below the crossmember, raise the engine slightly, and remove the crossmember. Lower the jacks supporting the transmission and engine assembly, then remove the bolts attaching the transmission to the engine. Check for any remaining wiring or hoses connected to the transmission, then move the transmission and jack toward the rear of the vehicle until the input shaft clears the splined hub in the clutch disc, keeping the transmission level. Once clear, lower the transmission slightly and remove it from under the vehicle. While the transmission is out, inspect all clutch components and consider installing new ones. For installation, insert a small amount of multi-purpose grease into the pilot bearing in the crankshaft and lubricate the inner surface of the bearing, as well as applying a light film of grease on the input shaft splines, input shaft bearing retainer, and release lever/bearing contact points. Install the clutch components, then secure the transmission to the jack, raise it into position, and carefully slide it forward to engage the input shaft with the clutch plate hub, avoiding excessive force. Install and tighten the transmission-to-engine bolts, ensuring not to use them to draw the transmission to the engine. Raise the transmission into place and install the mount, then install the crossmember and lower the transmission extension housing onto the mount and crossmember, tightening all nuts and bolts securely. Remove the jacks supporting the transmission and engine, install the transfer case and shift cable for 4WD models, and reinstall the various items removed earlier. Connect all wiring that was disconnected during removal and reattach the fuel lines to the transmission brackets. Fill the transmission with the specified lubricant to the proper level, remove the jackstands, lower the vehicle, connect the negative battery cable, and conduct a road test for proper operation while checking for leakage.

The diagnosis of the fault requires a comprehensive understanding of the transmission's operation and construction.

Before removing the transmission, drain the transmission fluid and detach the filler tube from the engine. Also, remove any exhaust components that interfere with transmission removal and then remove the rear driveshaft.