Steering issue

[Skswiger]

My son rear-ended someone in his 98.5 2500 cummins. Not much damage, wasn't a hard hit. Now it doesn't turn as far left as right. Nothing appears bent or broken. Looking for a little guidance.

 

[Fast69Mopar]

My son rear-ended someone in his 98.5 2500 cummins. Not much damage, wasn't a hard hit. Now it doesn't turn as far left as right. Nothing appears bent or broken. Looking for a little guidance.

Is this a 2WD truck or a 4WD truck?