Q: Car shakes in idle and reverse

asked by on November 06, 2017

My 1966 mustang has driven pretty well for the 2 years I have had it. Recently I changed the oil pan gasket and valve cover gaskets. A few days later I noticed when I would put the car in reverse i could feel something was off. It seemed to be running rough and would shake. I only notice it when in park and reverse. I changed the motor mounts and the harmonic balancer. The issue is still present. When in drive everything feels ok and it shifts through the gears just fine. I also changed the spark plugs as they needed it but that has not resolved the issue. Had a mobile mechanic come look at it and pretty much wasted an HR of time and found nothing and cost me nearly $200. Any ideas?
My car has an automatic transmission.

Hi Cyrel. Thanks for contacting us today. To be honest, there could be multiple issues going on here. It’s more than likely that you have a loose or damaged vacuum line or your ignition timing is off. A damaged torque converter (on an automatic transmission powered vehicle), could cause this type of vibration. I would recommend an onsite inspection, but since it was a waste of your time and money, you might want to consult with a local mechanic or Ford performance expert.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I check the oil?
Checking the oil is easy, and should be done with regularity, so that you’re never driving with unsafe levels of motor oil. Here’s how to check your oil. Wait about five minutes after driving your vehicle. You want the oil...
How do I install a booster seat?
If your child is too large for a forward-facing car seat but not yet large enough to use the seat belt correctly, you’ll need a booster seat. Actually, your child will spend more time in a booster seat than in...
Leak in heater core
Hello! That is a common problem with your particular vehicle. The heater core is made of a brass and aluminum material which is known to crack under the "heat stress" it endures. Luckily heater cores are rather inexpensive to purchase...
Squeaking noise in brake pedal
If your brakes are squeaking, this can be caused by a number of different things. The brake rotors (https://www.yourmechanic.com/services/brake-rotor-disc-replacement) could have a surface finish that no longer promotes quiet braking. The brake rotors should have a criss-cross looking surface finish...
cost of maniverter
Depending on the engine you have this price would be pretty close if both of them are being replaced. If this is for only one then it is high. You can get each manivertor online for less than $500 each...
My steering is very loose? Do you suggest I repair/replace Font Struts, Steering Rack or Tie Rods?
Hi there: Without being there to inspect your Honda Pilot, it's very difficult for me to give you accurate advice on what is causing the steering to be loose. All of the items you've listed in your question could be...
Is it ok to switch from synthetic oil back to regular oil?
If the vehicle requires that synthetic oil be used, I would recommend always using synthetic oil. If the vehicle does not require synthetic oil, I would only use what is required as money can be saved throughout the life of...
How much labor costs is it to replace spark plugs and wires on a 2001 buick lesabre?
The cost depends on whether you have the V6 or V8 engine. The V8 requires significantly more time for the plugs and wires due to the amount of disassembly required to get to the wires, particularly on the right bank...
2005 Honda Civic standard. Brakes are engaging themselves while we are driving. The car slows down on its own, the rotors get all
If the brake master cylinder internal residual check valve sticks it will not let pressure release to the brakes and will cause brake drag. You should jack up suspect locking brakes wheel and if it will not turn then crack...

Related articles

A Buyer’s Guide to the 2012 Ford Escape
CUVs CUVs (Crossover utility vehicles) are becoming more and more popular these days, as consumers are interested in saving money and buying more eco-friendly vehicles but they still have a lot of people and cargo to move around. CUVs like...
The Best Used Cars to Buy for Highway Driving
Do Do you spend hours each week on the highway for work? Maybe you just live in a very rural area and have to drive for 30 or 45 minutes to get to the grocery store. Whatever the case, your...
The Best Used Cars to Buy if You're Hauling a Horse Trailer
Horse Horse owners need a vehicle with towing capacity. Depending on the size of your trailer and the weight of your horse or horses, you probably won’t be able to get away with less than a 3,000-pound towing capacity, and...