Yea my intent was to be running about 6500 but the converter is only dropping back to 5800 on the 2-3 shift and taching out in 3rd,i was wanting it drop back to about 5500 but oh well,so it sounds like the 4.10's i ordered should not hurt me at all,don't want to go backwards and hopfully let me keep it around 6800ish through the traps or less less,thought about 3.91 but did not want to kill the launch,what did you rpm with the 4.10 and what size tire?