2007 Dodge Nitro front end vibration and steering wheel vibration also front end grabs when backing up driveway

SOURCE: Front end vibrations at highway speeds

sounds like you may have unbalanced tires. take your vehicle to a tire shop and have them balanced

SOURCE: 2001 Dodge Dakota loose steering

Hello
Welcome to FixYa
there is a u joint to be replaced on your steering shaft just after the steering shaft
open the hood look down to the steering shaft you will see a small u joint very common to go bad most auto parts stores carry the part
RD

SOURCE: 2000 Dodge Caravan....broken wheel studs...

Yeah , it's a fairly simple repair, All the wheel studs must be replaced and lug nuts also.Closely examine the wheel or get competent tyre replacement company to double check for damage ! Remove the brake disc caliper and brake disc itself (usually 2 cross head screws) , tap off (gently) it may be stuck thru corrosion / rust etc , Broken studs can be knocked out(towards drive shaft ) of the hub assy with a suitable drift and hammer (splined into hub) . The studs are a servicable replacement part. Check all other wheel nuts as this is usually a result from poor fixing or wheel replacement recently .. Good luck

SOURCE: vibration in front end

It is likely both your track bar and the lack of a steering gear box stabilizer. The bushings on your stock track bar can be replaced with polyeurethane or metal bushings which will help curb the problem.
The steering stabilizer attaches to your steering gear box and your frame allowing the steering to be more stable. I have put both on my truck and it drives like a caddy now as a result. If I had to choose between the two items, my money would go to the steering stabilizer first. I believe I bought mine here:
http://www.xtremediesel.com/bd-powerperformancedodgesteeringstabilizer.aspx
Hope this helps

SOURCE: 2004 dodge ram 4x4 front end shaking problems when

Could possibly need the steering box adjusted. It might be a little loose. And tire balance usually makes it shimmy. Could have a broken belt in one of the tires. Jack up the wheel and spin the tire and check the run out. (look for a wiggle when spinning the tire).