Maybe there is an outdated mod that broke the original D-series. Find it, remove it and if this didn't work try to clear cache or use safe mode
This is likely happening because a mod replaces a part containing rear wheels for the truck, try disabling any mods that would change any wheels on any car, or the truck itself. If this does not work, or you are willing to go back-and-forth with me to solve the problem, then follow these steps. load in a default truck that has the broken wheels. press ctrl+r to reload everything. press j to pause the game press the ` or tilda key on your keyboard, this will open the console. scroll upward till you find red text that refers to wheels. screenshot it and post it here.