Hi Customer (name blocked for privacy). Thank you for asking your question on Just Answer.
Could you define the shuddering more detail????
A/C PROBLEM
would check the freon first, a shop will always try the hardest thing on you. You may want to check for leaks if you recharged it and it loses coldness rapidly. Look for oily type stains on and around the a/c hoses and canister. This happened to me, a hose was leaking at the seam. It was much cheaper than what the shop wanted to charge me for my "failed compressor".
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