GM 24229175 Transmission,Auto(Goodwrench Remanufacture)

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After internal service/rebuild on 8L45 or 8L90 a "transmission service fast learn" must be done with GM scan tool, procedure can be done by dealer service department or any qualified repair shop. Start by first, taking off the engine covering and then by loosening the negative terminal of the vehicle battery, then lifting the car on jack stands properly. Pull out the old pan and drain the transmission fluid, also remove any exhaust parts that may hinder the removal of the transmission. Remove the shift cable and the inspection cover and be sure to indicate the relation between the torque converter and the drive plate. Working starting with the starter motor, the transmission vent hose and the dipstick tube should be removed then the torque converter-to-driveplate bolts while turning the crankshaft for clearance. Exhaust the driveshaft as well as the electrical connectors of the Park/Neutral position switch in conjunction with the transmission solenoid as well as the vehicle speed sensor. Remove transmission fluid cooler lines, excuse the free ends of these lines so that the fluid cannot spill out. Place jack stands under the engine and put some wood on that to establish a better position and lift the transmission with a suitable jack made for this purpose. The crossmember can be removed after loosening the nut of the transmission mount to the crossmember and the crossmember mounting bolts and nuts and then lifting the transmission to get out the crossmember. If so, take off the transmission heat shield and the rear air conditioning line bracket, if installed. Loosen the bolts fastening the trans to the engine, and the trans-to-oil pan bolts on the 2018 and later V6 models with a long extension and U-joint socket to get at them. Lower the engine and transmission approximately 6 inches, then, loosen and take out the nut of the dipstick tube bracket, and then pull out the dipstick tube being careful not to lose the tube seal. Place the torque converter locking pliers around the lower bell housing case through the inspection hole to minimize on the chances of dropping the torque converter whenever you remove the transmission from the car. Shift the transmission rearward to free the dowel pins from the engine block and to assure that the torque converter is off the driveplate before lowering the transmission. To install, make sure the torque converter is properly mated to the pump; engage it with some effort and smear some transmission fluid on the rear hub if it was removed. Place the torque converter onto the front input shaft and rotate it in opposite directions until it is fully connected; using a ruler you should be very sure that the converter lugs are below the mating area by at least ¾ of an inch. With the transmission safely bolted and secured to the jack lifting the bulky jack put the torque converter holes into the driveplate position. Shift the transmission forward until the dowel pins and the torque converter are in position, so there is no possibility of a gap between the engine and the transmission. Screw in the transmission dipstick tube with seal and tighten the inspection hole cover and tighten the transmission to engine bolts to ensure positive engagement. Lift the rear of the transmission and bolt in the crossmember, after that, remove the jacks that support the transmission and engine. Torque converter-to-driveplate bolts and tighten the bolts gradually, last one to have is the bellhousing cover bolts. Replace the starter motor and in case fit new retaining rings on the quick connect fittings on the transmission fluid cooler lines. Secure the terminals of the transmission electrical connectors, fit in the inspection cover followed by the driveshaft; any exhaust system part removed should then be re-established. modify shift cable, final removal of jackstands, lowering of the vehicle, replenish the transmission with the type of fluid recommended, engaging the engine and observing the possibility of leakage.

A faulty transmission should not be removed until the vehicle has been evaluated by a knowledgeable technician equipped with the proper tools.

Ensure the torque converter is securely engaged in the pump, applying transmission fluid to the rear hub if removed. Install the torque converter onto the front input shaft while rotating it back and forth, ensuring it engages in stages.