14 GMC Denali 1500 FINALLY has 2 speed T-case.

[andrehoude123]

Our 2500 duramax is in 4 low often enough especially pulling up 7000 pounds up a dirt road and a really steep one with toyo MT

 

[Ford850]

I have 4wdLow, 4wdHigh, and 4wdAuto. I think I use 4-low about as often as I use 4-auto. Not a lot, but occasionally, and I'm glad I have them both when I need them. I use 4-high about as much as 4-low and 4-auto combined. They all have advantages over the other.

 

[Diamondpilot]

I have 4wdLow, 4wdHigh, and 4wdAuto. I think I use 4-low about as often as I use 4-auto. Not a lot, but occasionally, and I'm glad I have them both when I need them. I use 4-high about as much as 4-low and 4-auto combined. They all have advantages over the other.

In addition to a fully selectable transfer case I have front and rear Detroit Lockers. I will never be without at least a rear E Locker. I use it about 1/3 the time I use 4 low.

Chris

 

[Ford850]

In addition to a fully selectable transfer case I have front and rear Detroit Lockers. I will never be without at least a rear E Locker. I use it about 1/3 the time I use 4 low.

Chris

Locker would be nice, but Ford's e-lock wasn't available on the heavy payload package. Using this truck with its limited slip and spin controls, it's amazing how well they work compared to trucks just a few years back. But for crawling in low, you can't beat a locker.

 

[sld]

I have manual hubs and use 4 low without locking hubs pretty often. Pulling a heavy boat up a steep ramp is a disaster for torque convertors if you heat them up and shut the truck off.

Plus I don't have to get out of the cab.:laughing:

 

[Topkicker]

I haven't needed or used low range in over 15 years..The trucks I have can do whatever I need in standard 4wd...I don't use them as tractors...Pulled trees, cars , trucks, whatever in high range with no problems...Not taking a $50k truck into the mud bogs anyway.

I used the Auto Select (would work like the AWD system) on the 13 Suburban this winter on the patchy roads. Worked flawlessly. When we go home to GA, we stay in a cabin up a steep and usually washed out gravel drive. Used 4H on the 1st trip up and then "Auto Select" on the 2nd. Had minor rear tire slip and then the front diff did the job. I had the Burb in 4L once just to feel the low range on a steep decent down the same gravel drive. That's the one and only time it's been used. Wasn't needed by any means. I save 4L for the lifted Wrangler on 35's.

 

[timswi]

I used the Auto Select (would work like the AWD system) on the 13 Suburban this winter on the patchy roads. Worked flawlessly. When we go home to GA, we stay in a cabin up a steep and usually washed out gravel drive. Used 4H on the 1st trip up and then "Auto Select" on the 2nd. Had minor rear tire slip and then the front diff did the job. I had the Burb in 4L once just to feel the low range on a steep decent down the same gravel drive. That's the one and only time it's been used. Wasn't needed by any means. I save 4L for the lifted Wrangler on 35's.

Yup, Had the selectable T-Case in the 2011 black GMC and Auto did just fine 95% of the time...Have no qualms at all with the AWD in the Denali...Both have lockers, that is a God-send.

We used to use low lock for general screwing around..Pull-off's and making noise and burning gas for no compelling reason..Ergo the 15 years since needed.

Might have used it on my diesel Suburban to pull a tree out of the creek and for some rather violent shrub removals--Can't remember.