GM 29537965
Filter

The method for automatic transmission fluid and filter replacement in a 4l80-e/4l85-e transmission starts by lifting and supporting the vehicle before placing a drain pan under the transmission Oil Pan to remove the Drain Plug when present until all fluid drains out. The Drain Plug threads must receive a small amount of fluid sealant gm p/n 12346004 or canadian p/n 10953480 before installation and tightening to 18 nm (13 ft. Lbs.). You must support the transmission with a transmission jack before removing the transmission mount nuts and support bolts as well as side bracket bolts and bracket. Remove the transmission range selector cable bracket bolts along with the bracket while maintaining attachment of the selector cable to its bracket. Disconnect the range selector cable end from the transmission range selector lever ball stud. The procedure now requires removing Oil Pan bolts while checking the reusable Oil Pan Gasket followed by Oil Pan and gasket removal. Start by removing the magnet which rests at the bottom of the pan. Then detach the Oil Filter with filter neck seal while cleaning the transmission case and Oil Pan Gasket surfaces with solvent. The process begins by implementing the filter neck seal and Oil Filter after which you should install the Oil Pan Gasket to the pan before adding the magnet if required. Set the bracket with cable in position before attaching the transmission range selector cable bracket and securing its bolts at 25 nm (18 ft. Lbs.). Next attach the Oil Pan with bolts and tighten them to 24 nm (18 ft. Lbs.). Use the transmission range selector cable end to attach the ball stud of the range selector lever before installing the transmission support along with side bracket and bolts to a torque of 95 nm (70 ft. Lbs.) and finally torquing the transmission mount nuts to 40 nm (30 ft. Lbs.). Take out the transmission jack then reduce the height of the vehicle while adding dexron® iii transmission fluid until reaching the recommended level.

The replacement process for allison automatic transmission fluid and filter must exclude fluid drainage when only changing the external Oil Filter. Use a suitable container to drain the fluid while you remove the transmission Drain Plug with its associated Drain Plug seal before inspecting the drained fluid contents. The transmission external Oil Filter will come off counterclockwise under standard strap-type filter wrench application. Inspect and clean the magnet from either the filter adapter installed in the converter housing or from the transmission external Oil Filter top to detect larger metal debris which may signal the possibility of transmission failure or overhaul. Start by placing the magnet onto the filter adapter in the converter housing and apply transmission fluid to the gasket on the transmission external Oil Filter before installing the filter until it contacts the converter housing. One complete time rotation of the filter settles the gasket touch point while protecting against damage and fluid leakage. Secure the Drain Plug onto its seal layer before tightening it to 35 n.m (26 lb ft). After adding dexron(R)vi automatic transmission fluid to the transmission it is possible dtc p0701 could set so engine ignition cycling should be performed to reach drive or reverse gear ranges. Test the transmission fluid level at the end as a final step.

Position the bracket with cable and install the transmission range selector cable bracket and bolts, tightening to 25 Nm (18 ft. lbs.).

Support the transmission with a transmission jack and proceed to remove the transmission mount nuts, support bolts and nuts, and the side bracket bolts and bracket.

Position the bracket with cable, install the transmission range selector cable bracket and bolts to the transmission, tightening the selector bracket bolts to 25 Nm (18 ft. lbs.).

Do not drain the fluid.

Check the transmission fluid level, noting that fluid remains in the external circuits and transmission cavities after draining.

Raise and support the vehicle, then place a drain pan under the transmission oil pan.

Raise and support the vehicle, then place a drain pan under the transmission oil pan and remove the oil pan drain plug, if equipped, allowing the fluid to drain completely.

Remove the oil pan drain plug if equipped, followed by the oil pan bolts and the oil pan itself.

Apply a small amount of sealant GM P/N 12346004 to the threads of the oil pan drain plug if equipped, then install and tighten it to 18 Nm (13 ft. lbs.).

If necessary, remove the magnet from the bottom of the pan, then remove the oil filter and filter neck seal, and clean the transmission case and oil pan gasket surfaces with solvent.

Remove the bolts to position the range selector cable bracket aside without detaching the cable.