Re: Changing the Transmission filter on my 4T45 this weekend....
I actuall found this write up from an ASE mechanic on another site that explains how to change the filter really well....
This was on a Pontiac G6 with a 4T45....jhvcx.
Automatic Transmission Fluid Filter and Seal Replacement
Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.
Position the vehicle on a hoist and raise the vehicle.
Place a drain pan under the transaxle oil pan.
Remove the oil pan bolts from the front and sides only.
Loosen the rear oil pan bolts approximately 4 times.
Notice: Pry the oil pan carefully in order to prevent damage to the transaxle case or the oil pan sealing surfaces.
Lightly tap the oil pan with a rubber mallet or carefully pry in order to allow the oil to drain.
Remove the AIR. Refer to Transmission Fluid Check .
Inspect the fluid color.
Remove the remaining oil pan bolts and the oil pan.
Remove the oil pan gasket.
Remove the oil level control valve.
Remove the oil filter and oil filter O-ring seal. The seal may stay in case when filter is removed.
Important: Do not score or damage the transaxle case when removing the filter neck seal.
Using a chisel, indent the top of the filter neck seal to relax the press fit.
Remove the filter neck seal from the transaxle case and discard.
Remove all traces of the old gasket material.
Clean the transaxle case and oil pan gasket surfaces with solvent, and allow to air dry.
Notice: Use petroleum jelly when lubricating the components. Greases other than petroleum jelly will change the transaxle fluid characteristics and will cause undesirable shift conditions or filter clogging.
Install a new filter neck seal. A large socket can be used as an installation tool as shown. Two mallets can be used as well.
Coat the new filter O-ring seal with a small amount of petroleum jelly, and install the filter into the case.
Notice: Push straight down on the center of the oil level control valve in order to prevent damage to the case bore.
Install the oil level control valve.
Notice: Refer to Fastener Notice in the Preface section.
Install the oil pan gasket, the oil pan, and hand start the oil pan bolts.
Tighten the oil pan bolts to 12 N·m (9 lb ft).
Lower the vehicle.
Refill transaxle using DEXRON® VI to the specified refill capacity.
• The bottom pan removal capacity is approximately 6.5 L (6.9 qt).
• The complete overhaul capacity is approximately 9 L (9.5 qt).
• The dry capacity is approximately 12.2 L (12.9 qt).
Start the engine. Warm up the transaxle and check for leaks.
Check for proper fluid level. Refer to Transmission Fluid Check
As for checking the level, there is a small plug that needs to be removed from right (passenger side) of the trans, sits just below the axle seal, and aprox 12 mm head on it, with car running, on a level surface, undo that plug, have a catch pan ready incase its over full, when the fluid stops draining out its full, if nothing comes out, add fluid until it comes out that hole. Fluid is added through the vent cap wich is on top of the trans, kinda under the air inlet duct for the engine.
Life begins at 140MPH...just wish I could get there!