Well I was 180 miles overdue to drain my ATF, and I finally got a chance today. I didnt get off work until 4 and it gets dark around 5, not to mention it was very windy and 40 degrees. So I extracted the ATF from the dipstick, then dropped the pan. Pulled the filter and then adjusted my rear bands. I am putting in a temp sensor, so I cleaned up the pan and put it on the drill press. I then welded on a 1/8" NPT bung and fitted it with a sending unit. By this time it was dark out and I had to be somewhen in 15 min! So I re-installed the pan torqued to spec, filled up the fluid. It took 5.5 qt, which is exactly half the total capacity. Obviously I didn't have a chance to pull cooler lines and finish the full flush. So my question is should I just run a short OCI? I just don't want to waste a bunch of ATF. I may need to re-adjust my bands, if thats the case ill just do a full flush. The reason I ran ARX is I was experiencing shudder in reverse, the shudder left for a couple hours, but when backing into my driveway it came back slightly! I probably have 3 oz of ARX in should I add 3 more and run 1500 miles, since its fully synthetic ATF and was during the clean phase? Or do you think a full flush would rid of all the junk and get rid of the shudder?