Thanks for the update, always appreciate finding out about what happened, especially a big project like this. That's a lot of work of you've done and it's good to hear the second transmission in working well.unggthat wrote: ↑03 Mar 2021, 19:05 Just to conclude here--the second used transmission is in the car and working perfectly. I spent a long time making sure the fluid was fully flushed and at exactly the correct level while the fluid was at 40 degrees C. Though I didn't take the plunge and remove the bellhousing side case, I'm confident everything is working right now. The second time went much faster than the first, for what it's worth...
Like SuperHerman asked, I'd be interested in knowing the year and type/model number of transmission you used successfully the second time.
I finally figured out how to calculate the internal gear ratio differences between the 50sn and 51sn transmission types and the ratios differences are very minor so, in my case, where I bought a 51sn (2001-2004) to replace the 50sn the only real difference that I could find was the final drive ratio as a possible incompatibility and those gears can be swapped if needed. Newer model years (2005 on) changed the connectors types for the wiring harness so this is a known difference in later years.
