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2000mc · 07-07-2012, 02:10 PM

this might also vary from vehicle to vehicle. for underpowered vehicles, or vehicles where running the a/c makes a noticeable difference in performance, there could be an indirect affect. i have about a half mile long steep hill on my commute right now, with the a/c on i cant maintain 4th gear up the hill. even hitting the base of the hill at 65 i drop under 40, and out of 4th gear, by the top. with the a/c off i can maintain speed up the hill. same applies to a variety of situations for me, cutting the a/c can either allow the trans to shift earlier, or hold a higher gear.

07-07-2012, 02:10 PM	#13 (permalink)
2000mc herp derp Apprentice Join Date: Oct 2008 Location: Lawrence, KS Posts: 1,049 Saturn-sold - '99 saturn sc1 Team Saturn 90 day: 28.28 mpg (US) Yukon - '03 GMC Yukon Denali 90 day: 13.74 mpg (US) Thanks: 43 Thanked 331 Times in 233 Posts	this might also vary from vehicle to vehicle. for underpowered vehicles, or vehicles where running the a/c makes a noticeable difference in performance, there could be an indirect affect. i have about a half mile long steep hill on my commute right now, with the a/c on i cant maintain 4th gear up the hill. even hitting the base of the hill at 65 i drop under 40, and out of 4th gear, by the top. with the a/c off i can maintain speed up the hill. same applies to a variety of situations for me, cutting the a/c can either allow the trans to shift earlier, or hold a higher gear.