You don't list your rig in your signature, but for the 2001 DC calls for ATF +4 which is hard to find anywhere, lord knows I tried. From what I understand (someone correct me if I'm wrong) it is a mix that is blended especially either for or by DC. Supposedly it is different than +3 and nothing but +4 can be used, again this according to what I read in either the OEM manual or the owner's manual.
I believe I paid almost 20. 00 per gallon for it at the only place I could find it, at the local stealer. OUCH, that hurt. Could have driven a semi thru my butt after that visit.
Check your owners manual and see what it suggests?
zman