Quote:
Originally Posted by athomas
I'm not sure what a 4% grade looks like but anything too steep will likely ruin the 149 and you also! A 500 lb tractor will have a hard time stopping a 3000lb load, just my opinion though! 
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You can see from the red scale on this chart, 4% slope is not very much. I'd think even the hydro alone could stop it as long as there isn't a lot of momentum built up.
The question is, how sure is Whitegrass about the 4%? We need more pictures of his driveway.