ABS(no light) comes on at 5mph when turning in compacted dirt lot

[GladysDude21]

Gladiator was serviced for 20k miles June 10th, since then abs has been coming on at a weird time. small down hill drive that has a small 1 inch lip where it drops to compacted dirt (not loose stone). slight turn to the right and as soon as i hit that lip my abs comes on but no lights. Max speed there is 8 mph maybe!
Also had it happen in my lot, again compacted dirt, but flat where I turned left to get into my spot and ABS kicked on with no light.

Going up a slightly steep 2' grass climb it comes on but with the light so that seems fine because it is sort of steep, but the above 2 seem not right. Shop said no speed sensors were triggered and no indication that anything is wrong. Shop told me to go slower taking turns???? Said they could only make abs come on at high speeds and cranking the wheel... not sure they listened to what I was saying at all but ok thanks for doing donuts in the lot with my truck??!!??
Any ideas?

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[Rahkmalla]

Doesn't sound like ABS. Sounds like you're turning too hard on not loose enough ground in 4hi or 4lo

 

[GladysDude21]

That's the thing though I'm not cranking the wheel. Its not a sharp turn and at that speed it doesn't make sense.

Also
Not in 4hi or 4lo.

 

[NachoRuby]

That's the thing though I'm not cranking the wheel. Its not a sharp turn and at that speed it doesn't make sense.

Also
Not in 4hi or 4lo.

Are you sure it's not traction control and the brake lock differential?

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