Originally Posted by 0ri0n
I have a 2013 2x4 Prerunner. I wanted to know what mode if best for driving in heavy snow with chains/cables on your tires.
Also why would you ever want to have "open differentials"
Sorry if this was already covered, I only got through the first 25 pages. Great thread!
Hi Orion (The Hunter),
The only time you would select VSC OFF MODE (open differentials without traction control) is to let the tire(s) spin freely to clean off the tread from snow or mud or to act like a goofball and spin around. Having open differentials, as all Tacomas have (except '05-'08 Sports, in the rear), makes steering easy and less mechanical problems.
This is why Low 4WD without A-TRAC is so 'weak' compared to High Range 4WD with TRAC ON. I can climb a grade further in H4 (normal TRAC ON mode) than L4 with A-TRAC Off.
The non-Off Road TRD 4WD Tacomas do so much better after performing the 4-Low Trac Mod, to fool the truck so TRAC works for them in L4. Those of us with the Off Road TRD should push the A-TRAC button and always have A-TRAC on standby when you go into Low Range.
As for your first question... the standard mode in H2 and H4 (TRAC ON) is best for almost all driving. In L4, have A-TRAC on standby by pressing the button when you go into L4, and it will always be on standby until you push it again.
The only times to use AUTO LSD is if you don't want to use 4WD... to move from a stop should one tire spin... and if you are in snow or mud:
H4 is better than H2 with AUTO LSD to get moving.
H2 with AUTO LSD is better than H2 with TRAC to get moving... as AUTO LSD is TRAC, but without engine output regulation.
In H4, TRAC already is free of the regulation (2009-2011), so it is like AUTO LSD, but on all 4 tires... Now, we had some discussion about some changes made in 2012, which (if I recall correctly) changed the wording of the modes in H4.