It very much depends upon your level of engineering skills and facilities, both of which need to be extensive to work successfully on modern automatic gearboxes..gfxlearner wrote: Regarding the E2 clutch - can I do something about it , or only a garage can handle it?
I have no direct experience of the AL4 but have much experience of rebuilding its big sister, the 4HP20. If you have a look at my website pages on the 4HP20 overhaul, it will give you an idea of the complexity of the job. Please do note that the 4HP20 is significantly different in some critical respects but generally the approach will be similar and will enable you to decide if you might attempt the job.
If you do decide to attempt the job I can offer you a copy of the manuals you will need. Be aware the first job you will have to do is remove the engine and gearbox as a unit from the car..
An alternative, if you decide not to overhaul your faulty gearbox, is to obtain a replacement from a scrapped car but you must source one from an identical car. The AL4 was used in a large variety of cars but all will be different in detail and may not be suitable for your car.