Well I did a log tonight. I locked the trans into 3rd gear with the scanner and made a wot pull. Heres the data I got:

rpms: 2850|2950|3050|3200|3400|3550|3800|3950|4035|4062| 4112|4170
Slip: 11.6 |12.6 |14.6 |16.5 | 17.1 | 19 |19.6 |20.8|17.4 |14.8 |11.7 |8.6

Looks to push to 4k in boost.

 

I like looking at rpm more, but that looks fine. Slip below 10% at 4200rpm is great.