Will68
New member
Anybody with a 22-23 LT have issues with Auto 4wd after installing Ready Lift 2-1 SST leveling kit?
Auto 4wd
- Thread starter Will68
- Start date
Stormin08
Well-known member
i have the 1.75" level, i highly doubt it is related...but my lost communication with the TC after a failed up date...but it was with a few days of installing the lift.
i keep seeing and hearing these claims...but noone can seem to explain WHAT EXACTLY the issue is,...the only thing i can think of, is the shaft angles are steep enough that it may hinder some sort of engagement, but i cannot see how that is possible.
i keep seeing and hearing these claims...but noone can seem to explain WHAT EXACTLY the issue is,...the only thing i can think of, is the shaft angles are steep enough that it may hinder some sort of engagement, but i cannot see how that is possible.
Will68
New member
Thanks, I'm going to call Ready Lift to see if the 1.75 kit will work with the Auto 4wd and Adaptive Cruise. I didn't see anything on their website regarding it.
PistolsFiring
Well-known member
This issue with auto 4wd is the torque applied when it engages. RL’s website mentions that you may get chatter or vibration, at least with the 2.0 sst kit. You typically place your truck in 4 high at low speeds and 4 low in neutral while slowly moving forward or even stopped. You can turn on 4 auto and drive 60 mph, the truck stays in 2wd until wheel slip occurs then it engages. I’m under the understanding that it’s that sudden engagement, along with the non factory angles from the front level, where the potential issue occurs.
I agree, I’m not sure if it’s that big of a deal or if RL has a few reports of issues and wants to cover their rear end.
I agree, I’m not sure if it’s that big of a deal or if RL has a few reports of issues and wants to cover their rear end.
Stormin08
Well-known member
i figured it was an engagement related issue...then again, i have said it before...me personally, i select my mode...and have NEVER used the AUTO feature of any vehicle i have owned. i recall years back trying it 1 time and didnt like the sounds it made when it THOUGHT it needed to engage.
i want to rely on that feature, by an AWD Subaru.
i want to rely on that feature, by an AWD Subaru.
Ryanj5049
Active member
is the auto feature the actual, mechanical 4x4 engaging based on wheel spin etc? i tend to have it on auto in the rain but have never felt anything engage.
PistolsFiring
Well-known member
AUTOMATIC 4 HI
If road conditions frequently alternate between high- and low-traction areas, consider using the “AUTO” setting found on select GMC electronic transfer cases. This setting allows your GMC to automatically distribute torque to the front axle by anticipating the need for additional traction. Shifting into “auto” engages the front axle, but the transfer case sends power primarily to the rear wheels in normal conditions and the clutches modulate torque forward to provide stability and enhance traction to the vehicle. Although not always optimal for efficiency and wear of your vehicle 4wd driveline, AUTOMATIC 4 HI can be used on any road condition without risk of damaging your vehicle.
Decent description from gmc.com
If road conditions frequently alternate between high- and low-traction areas, consider using the “AUTO” setting found on select GMC electronic transfer cases. This setting allows your GMC to automatically distribute torque to the front axle by anticipating the need for additional traction. Shifting into “auto” engages the front axle, but the transfer case sends power primarily to the rear wheels in normal conditions and the clutches modulate torque forward to provide stability and enhance traction to the vehicle. Although not always optimal for efficiency and wear of your vehicle 4wd driveline, AUTOMATIC 4 HI can be used on any road condition without risk of damaging your vehicle.
Decent description from gmc.com
SilvyakaSylvia
Member
I usually use AUTO when it's raining and the streets are slick. Prevents wheel spin from the 6.2 when driving from a stop.
PistolsFiring
Well-known member
I’ve got the 5.3 and have no such problem
Dickie Dunkelberger
Member
I use 4 Auto relatively often. The 6.2 and the Duratracs can allow for quite a bit of spin on slick roads in 2wd even with moderate throttle. Quick pulls into traffic are a bit more dramatic than need be without it engaged. When it gets snowy out the Auto system works excellent, I only need to put it in true 4hi when the roads are fully covered and packed below the wind swells.
GMs Auto setting is much better than Ford/Ram which both of them use the same basic system - outside of the Raptor and Hi-level Tremor which use a clutch based system (not sure what the TRX has, but know the Rebel doesn't have an auto setting as they use the basic work truck on/off hi/lo system, presumably b/c they know their auto t-case has issues with heavy duty use). Had the 4 Auto case in my 2004 Silverado, this one seems to function the same, and I never had any problems with drivetrain longevity in my old Silverado which got up close to 200k in miles. Now in my 2015 F150 Lariat that system sucked... it made so much noise and would bind and pop from time to time (had it in the shop for use issues multiple times and they had to replace a number of parts, can't remember what, and it never quite felt right).
GMs Auto setting is much better than Ford/Ram which both of them use the same basic system - outside of the Raptor and Hi-level Tremor which use a clutch based system (not sure what the TRX has, but know the Rebel doesn't have an auto setting as they use the basic work truck on/off hi/lo system, presumably b/c they know their auto t-case has issues with heavy duty use). Had the 4 Auto case in my 2004 Silverado, this one seems to function the same, and I never had any problems with drivetrain longevity in my old Silverado which got up close to 200k in miles. Now in my 2015 F150 Lariat that system sucked... it made so much noise and would bind and pop from time to time (had it in the shop for use issues multiple times and they had to replace a number of parts, can't remember what, and it never quite felt right).
