The four-speed transmission on my 1983 240D recently failed. The shop said it was either the clutch or I need a new transmission, but they need to drop the transmission to find out, which was gonna run me upwards of $400, just to tell me whats wrong. I decided to attempt the task myself, in an unheated garage with standard jack supports. I have a Haynes repair manual, which tells me how to remove the transmission. I have a few questions for anyone who can answer them and would greatly appreciate any advice.
1. It says to remove the exhaust system, do I have to remove the entire system, or just what's in the way?
2. It says to remove the driveshaft, do I have to remove the entire driveshaft, or just the front section? Is that possible?
I'll probably think of more on the way.

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1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition