i have an '05 dmax with the predator set usually at +65. i've slipped it once at the setting and now all is well. But every now and then when going from a dead stop very slowly (shiftpoints at about 1700ish rpm's) it will shift into 3rd gear like my F-250's ats built tranny would... its will just SLAM into 3rd, but other than that everyother shift is normal, and when i let it shift around 2k rpm's it wont slam like that. any help would be great! I'm lost...

Thanks

anyone?