Question about Cars & Trucks
This may just be a exhaust leak, if the car is in park and you rev the engine do you hear the rubble?
Posted on Dec 08, 2012
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Posted on Jan 02, 2017
SOURCE: new 2008 Hyundai sonata. undder
This behavior is due to the innovation of the ECT-i ( Electronic Controlled Transmission with intelligence). Major car companies are developing this type of transmissions nowadays. And, since they are in their early stages, is still not fine-tuned; ergo still under research. This doesn't mean the transmission will fail either.
The vibration indicates the car is in low revs when engaged in the last gear. Let's say it's a 5 speed auto trans... and the car is going about 35mph at 5th gear... even though the ecu in the car recognizes it should go to 4th gear, the only thing the car ecu can do is reduce the gas input, because the trans got it's own ecu, and it's not controlled by the main ecu anymore. When you
accelerate, increases revs, ergo downshifting to 4th gear and getting rid of the vibration. The powerplant in the vehicle is still OK. No need to worry about.
Posted on Aug 21, 2008
SOURCE: knocking sound
maybe cv joints. check cv boots to see if torn or look out for grease marks in the area behind front wheel. This would be more clicking noise though and not banging.
Posted on Oct 08, 2008
bring the car to an exhast shop and have the exhaust system flow tested it could be your muffler came apart on the inside and is plugin the tail pipe
Posted on Apr 14, 2009
HOPE IT'S NOT PISTON SLAP, IF LACK OF MAINTANENCE WAS THE CASE MAY BE INTERNAL DAMAGE OR VALVETRAIN DAMAGE. IF IT RUNS ROUGH MAYBE SOMETHING ON ROTATING ASSY DAMAGED.
Posted on Jul 12, 2009
The water pump bearings could be going out and they will make a grinding noise.The water pump doesn't always leak when the bearings are going out.
Posted on Sep 01, 2009
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