This is an issue on my lad's LC Racing SCT but guess it applies to any truck,car etc
When off the ground, the steering works fine and has really good articulation in both directions, servo works fine and no issues BUT when it's physically on the ground the steering really struggles. It turns but no where near as much as in the above scenario.
It's only really started doing this recently and after I stripped it down, cleaned and rebuilt it.
Any thoughts on what could be causing?