car started shaking going about 45 mph

Hello,

This sounds like you have a tire that is coming apart in the tire tread. Here is a guide that can help us

https://www.2carpros.com/articles/steering-wheel-shakes-when-accelerating-or-braking

Please run down this guide and report back.

Thanks for this post I had the same problem and had to replace both front tires. All fixed! I love this site.

1998 Dodge Avenger 102,000 Miles Car Shakes when going faster that 60 mph what do you think it could be

85% of the time it is a tire balance problem-IMHO. But not to rule out bent rim, tire irregularities of a loose steering/suspension item.

What could be wronge with my car if it shakes when i drive or what could be wrong when my steering wheel shakes when i drive?

Well the first signs of vibrations are usually first looked at from the balance of the tires, which should be balaced every six thousand miles or suspention issues. The first thing a mechanic might ask is at what speeds does this happen, which is very important. Logically get your tires balanced you have not done so in the last six thousand miles and if vibrations continue then have your cv joints and struts or shocks checked by your local mechanic.
If you have any questions about what signs to look for on tires or suspention that could cause this issue just let me know.

Hope this helps!