^^^^^This... As long as rpms were up with the d66, it was cool and no smoke, but acceleration to get rpms up was hot and smoky. I had to just about drop outta OD to keep rpms up and make turbo happy, I also have zf5 with 3.55s as well... The D66 was bad In the mountains, especially in the national park. People cruising at 35 put me either 3000 rpm in 2nd, or 16-1700 rpm in 3rd, and was hot and Smokey at that rpm in 3rd. Now I can lug it down to that rpm and cruise up the mountain all day at that speed in 3rd, and never even break 800, before I'd been we'll above 1200 trying to do that