'83 W123 Transmission Flair

[Alex E]

I recently serviced my '83 300CD's transmission and now have a problem. Would like your expert thoughts...

I've had her a year and before I bought it had a indy shop check it out. Report was good so I had shop change tranny filter and fluid while it was there. He did not drain the torque converter, I don't know what brand of fluid was used but was Dexron 6.

Car shifted beautifully but when hot would have a second and a half delay going into drive from reverse. Last week I drained the fluid and converter, new filter and changed the fluid to Redline D4. I also changed the K1 spring to the lastest 'improved' version. I don't drive it in the winter but last year took it out when below freezing and noticed a slight 2/3 flair when stone cold.

After changing fluid to Redline and new K1 spring car immediatly has a 3/4 flair under normal acceleration, not when babied or hard throttle. It never 3/4 flaired before. When hot car no longer has delay going into drive from reverse or park.

Could the 3/4 flair be caused by the Redline D4 fluid, K1 change or both?

Can not find info on K2 spring part number. I'd like to put a new one in. Some posts have said K1 spring works in the K2 position. I would really appreciate your experience and thoughts with this situation.