Hey folks, thought I would revive the thread.
So ive still been driving on the original trans since my last post, all throughout the winter. As reverse still kinda held in there. I was clever, I orchestrated only one reverse per trip; drove forward out of the driveway into the morning (slightly up hill), and was able to back into my spot at work (flat grown), then drove straight out in the afternoon, and backed into the driveway without a hitch. Man the things you think about when you barely have any reverse, I can just imagine what folks with low range electric cars feel like
Now that the warmer weather was showing up, and one event a few weeks ago involving a spot that faced down hill, I told myself I needed to swap the trans ASAP.
Last weekend, my pops and I spend a sunny Sunday and did the swap. It went pretty straight forward, but there were some hiccups and it was just pain cumbersome doing the swap in the driveway instead of on a lift. A 4ft socket extension was needed to get to the top 2 bolts holding the trans on the engine, but we got it. Started at lunch, got it done by 8. Fired it up, and voilą! I had movement! and REVERSE!! oh man the prestige of having reverse!
Heres where the fun begins though. So its been a week of driving, and fiddling with the modulator getting the shift feel and timing right. But now im running into issues. So the shift itself is ok, a bit too firm (just modulator adjustment), but it feels fresh and new, and engages quickly.
I think my problem though is either governor related, or valve body and its getting worse as the days go by. From a cold start, the car will want to say into 2nd gear for an eternity, then all of a sudden it will go into 3rd, and then everything is fine from there on in as things start to warm up. I don't like revving the engine upto 3000rpm when its cold.

It will downshift when you put your foot into it, and properly downshift gears as you come to a stop, and shift up as you take off. SO that's alright,however the boden cable is super sensitive (much more then before, and on my 560sel). Sometimes it will go into 3rd, then right away into 4th.. a bit too "narrow" if you get my hint.. And no adjustment of the boden will fix that, it brings a (warmed up) 2-3 shift too high, and 3-4 where it should be.
Any hints?? I have a feeling someone has fiddled with the valve body, and that is the only thing I didn't do a full once over on. I have a spare good one here right beside me, waiting to go in if it will help.