No matter if it's a manual or automatic, this is a big job. No matter which one, you'll be dropping the exhaust and various heat shields to get access to the transmission and driveshaft. Again in both cases the driveshaft needs to come out.
For a manual, a complete seal job involves removing the transmission so you can get access to the front seal. This is also a great opportunity to do your clutch and engine rear main seal as well as refurbish any sloppy shifter components. If you know it's only leaking from the tail, you can get away without dropping the transmission. The tailshaft seal, shift lever seal, and detent cover can all be accessed after dropping the driveshaft and shifter. If your leak is coming from the bellhousing area, you should plan on adding the input shaft seal, engine rear main seal, oil pan gasket, and clutch job if it's anywhere near due. Be certain that your leaks aren't actually coming from the top side of the engine and dripping down.
An automatic transmission job would be a similar amount of work. Of course there are differences. Many times though, most of an auto tranny leak is from the fluid pan which does not require dropping the transmission or driveshaft at all. In this case your doing a transmission filter and pan gasket.
"Howdy, Folks!"
1986 Delphin 528e - Roof rack equipped lumber hauler.
1989 Zinnoberrot 325iX Sedan - I miss this car. (Deceased)
1998 Avus Blau 328iC - Someone else's project now
2008 Platinum-Beige X3 3.0si - Current project
2012 Alpine White X3 xDrive35i - My new snowmobile.
2020 Estoril Blue 440i xDrive cabrio - This car is a blast to drive.
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