The D1 tdi is hardy endowed with power nor off idle torque. I have been on the bench with several and they never struggled towing in boggy sand but aired down and driven well. My brothers county when it had the 3.5 v8 with a blown head gasket easily towed a 2 tonn trailer up and down steep cuttings with boggy sand with cheese cutter stock tyres. Tyres down, truck not too heavy, torque down low, gearing and good driver...
Cheers

