How to disable VSC/TRAC on 4th Gen?
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How to disable VSC/TRAC on 4th Gen?
Has anyone managed to install a switch that will disable the Vehicle Stability Control (VSC) and/or Traction Control (TRAC)? When offroading in snow or muddy conditions, the system wants to apply the brakes (ABS) when the wheels begin to spin. Many times, I want to be able to spin and keep momentum to get out of the nasty condition rather than be forced to slow and stop in the middle of it. I'm hoping that there is a wiring bypass switch that can allow me to temporarily disable the feature(s) on demand.
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That's correct. The center diff locking button does turn off the VSC. However, TRAC is still enabled. TRAC will apply ABS when a wheel is spinning. The other thread https://www.yotatech.com/forums/showthread.php?t=45793 is on the right track (no pun intended).
#5
To add to the TRAC confusion, I saw a small muddy field parking lot today and decided to check it out. With my center diff open, the TRAC kicked in almost immediately as I went into the field. Then a bit later, I locked the center, and proceeded to spin the tires and slid around a bit, and shot mud everywhere. It didn't seem that the TRAC kicked in at all. I was in 4H the whole time. Perhaps the TRAC disengages in 4H but activates again in 4L when the center is locked??
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4th gen has GEN II ATRAC. imo, it's a really nice setup, I like it alot. It's amazing what it can do.
I've had the same experience as RBLA w/ the CDLocked.
I've had the same experience as RBLA w/ the CDLocked.
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VSC is disabled when you lock the center diff. The reason you dont like VSC is that it throttles back when it senses a lot of wheelspin, thus killing momentum. (ask me I got stuck badly ona sand dune because of this). When you lock the center diff TRAC still works in both 4H and 4L, however once you rev beyond 3500RPM (or somewhere close) TRAC turns off to prevent damage to the driveline. Imagine full throttle at high RPM and it grabs a brake and sends all the power to the other wheel. TRAC only sense the wheelspeed difference between wheels on the same axle, so if both are spinning at the same speed it will be happy. That is the reason why guys can put lockers on it with no ill effect, VSC however will create problems with lockers as it senses a whole lot of variables and acts accordingly.
So for snow, mud, sand, etc lock the center diff and you will be fine. WHen you feel the TRAC kicking in it actually just helps to maintain your momentum.
So for snow, mud, sand, etc lock the center diff and you will be fine. WHen you feel the TRAC kicking in it actually just helps to maintain your momentum.
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Today, I confirmed the claims that high RPMs will effectively disable TRAC. However, high RPM's on a slippery snowy road is not for me. 3500 RPM's is a lot in the V8 and would be extremely unsafe on a tight road with rocks, trees, and major cliffs within arms reach. Need to find a way to kill TRAC on demand.
#10
Originally Posted by yabedude
... However, high RPM's on a slippery snowy road is not for me. 3500 RPM's is a lot in the V8 and would be extremely unsafe on a tight road with rocks, trees, and major cliffs within arms reach. Need to find a way to kill TRAC on demand.
http://www.scc-chain.com/Pages%20Tra...ucts/szlt.html
size ZT-741
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yabedude,
I guess I'm having a hard time understanding why you want to disable trac when going slow... not doubting your driving abilities or anything but am a little confused.
I ran some icey trails up in Big Bear last year and the trac was very good for those situations. Wheelspin= loss of control. I want traction, thus control.
For higher speed stuff, like the dunes Andries mentioned, it is transparent with the CDL... you can leave the CDLocked for your entire trip offroad...
Not saying trac is perfect or anything but...? imo, seems pointless to try to disable it. Hope I'm not opening a can of worms but how is this going to help on the trail?
I guess I'm having a hard time understanding why you want to disable trac when going slow... not doubting your driving abilities or anything but am a little confused.
I ran some icey trails up in Big Bear last year and the trac was very good for those situations. Wheelspin= loss of control. I want traction, thus control.
For higher speed stuff, like the dunes Andries mentioned, it is transparent with the CDL... you can leave the CDLocked for your entire trip offroad...
Not saying trac is perfect or anything but...? imo, seems pointless to try to disable it. Hope I'm not opening a can of worms but how is this going to help on the trail?
#12
Originally Posted by yabedude
Today, I confirmed the claims that high RPMs will effectively disable TRAC. However, high RPM's on a slippery snowy road is not for me. 3500 RPM's is a lot in the V8 and would be extremely unsafe on a tight road with rocks, trees, and major cliffs within arms reach. Need to find a way to kill TRAC on demand.
Sorry guys, I forgot my camera.
Lesson Learned: Don't go wheeling w/out someone to help you safely recover your vehicle, a winch on my vehicle would not have helped me that day.
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Originally Posted by FirstToy
yabedude,
I guess I'm having a hard time understanding why you want to disable trac when going slow... not doubting your driving abilities or anything but am a little confused.
I ran some icey trails up in Big Bear last year and the trac was very good for those situations. Wheelspin= loss of control. I want traction, thus control.
For higher speed stuff, like the dunes Andries mentioned, it is transparent with the CDL... you can leave the CDLocked for your entire trip offroad...
Not saying trac is perfect or anything but...? imo, seems pointless to try to disable it. Hope I'm not opening a can of worms but how is this going to help on the trail?
I guess I'm having a hard time understanding why you want to disable trac when going slow... not doubting your driving abilities or anything but am a little confused.
I ran some icey trails up in Big Bear last year and the trac was very good for those situations. Wheelspin= loss of control. I want traction, thus control.
For higher speed stuff, like the dunes Andries mentioned, it is transparent with the CDL... you can leave the CDLocked for your entire trip offroad...
Not saying trac is perfect or anything but...? imo, seems pointless to try to disable it. Hope I'm not opening a can of worms but how is this going to help on the trail?
Find a nice slimy stretch of trail that has 2 ruts about 8-9" deep so that the belly of your rig is dragging. Make sure it just rained and that the trail is basically a cattle trail and caked with mud like the Indians used to make houses with. You do not want TRAC to kick in. You want all 4 wheels spinning to get you through that crap. Step outside the cabin and you'll be sinking up to your ankles in the ˟˟˟˟˟. Been there, done that.
Only yesterday did I find out that high RPM's would have helped, but there are trails where I don't want to be driving like a maniac. It's too risky in some environments.
No, I want to have a switch to disable TRAC on demand so that I can maintain a constant wheel spin and not have to be spinning my wheels at 50 MPH.
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Originally Posted by yabedude
FirsToy: It's not a can of worms. My request is becoming more common. I agree that TRAC is good if you have momentum, but when you have no momentum and are trying to get momentum, there is little you can do. Maybe you've not been in a real sticky situation yet?
Find a nice slimy stretch of trail that has 2 ruts about 8-9" deep so that the belly of your rig is dragging. Make sure it just rained and that the trail is basically a cattle trail and caked with mud like the Indians used to make houses with. You do not want TRAC to kick in. You want all 4 wheels spinning to get you through that crap. Step outside the cabin and you'll be sinking up to your ankles in the ˟˟˟˟˟. Been there, done that.
Only yesterday did I find out that high RPM's would have helped, but there are trails where I don't want to be driving like a maniac. It's too risky in some environments.
No, I want to have a switch to disable TRAC on demand so that I can maintain a constant wheel spin and not have to be spinning my wheels at 50 MPH.
Find a nice slimy stretch of trail that has 2 ruts about 8-9" deep so that the belly of your rig is dragging. Make sure it just rained and that the trail is basically a cattle trail and caked with mud like the Indians used to make houses with. You do not want TRAC to kick in. You want all 4 wheels spinning to get you through that crap. Step outside the cabin and you'll be sinking up to your ankles in the ˟˟˟˟˟. Been there, done that.
Only yesterday did I find out that high RPM's would have helped, but there are trails where I don't want to be driving like a maniac. It's too risky in some environments.
No, I want to have a switch to disable TRAC on demand so that I can maintain a constant wheel spin and not have to be spinning my wheels at 50 MPH.
I totally don't get it but I'll just leave it at that. - and not to criticize what you're doing at all- hope you find a fix for your dilemma.
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I don't get it either.
You can't have front & rear lockers, since they don't make em yet... Why would you want no TRAC, it's the only thing to keep you in control of the truck?
I mean, yeah, you're right, it would be nice to have an on/off switch, but if you're following what Ducky's doing in that other thread, it ain't going to be plug & play.
You can't have front & rear lockers, since they don't make em yet... Why would you want no TRAC, it's the only thing to keep you in control of the truck?
I mean, yeah, you're right, it would be nice to have an on/off switch, but if you're following what Ducky's doing in that other thread, it ain't going to be plug & play.
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I'm aware Lance is running a rear locker, but he is a rare breed. For 99% of the 4th gen public, though, TRAC actually keeps the wheels spinning controllably (like a limited slip differential does).
I don't want to discourage anyone from trying to turn off traction control; it's just not necessary or beneficial... IMO.
Remember, also, if you disable VSC, TRAC and any of the other "safety" features if your truck, you're the one who is inevitably responsible in the event of a crash/ injury.
I don't want to discourage anyone from trying to turn off traction control; it's just not necessary or beneficial... IMO.
Remember, also, if you disable VSC, TRAC and any of the other "safety" features if your truck, you're the one who is inevitably responsible in the event of a crash/ injury.
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Originally Posted by mypalthetortoise
You can't have front & rear lockers, since they don't make em yet...
trac/vsc won't be affected by installing ff/rr lockers (trac wont activate while locked but unlocked you will still have trac/vsc)
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Originally Posted by FirstToy
ARB makes a rear locker and front will be coming soon. Good Times (aka, Dialup boy) is running a ARB rr locker for a while.
Back to the thread, I suppose if you get f/r lockers you don't have to worry about the trac
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Originally Posted by Good Times
Back to the thread, I suppose if you get f/r lockers you don't have to worry about the trac