When i start the car, i let it warm up.
I start driving and everything is smooth.
Now lets say i have a turn coming up to make so i have to slow down pushing on the brakes, so the car slows down, shifts to lower gear and so on. Everything is fine until now. But when i push the pedal again to re accelerate, as soon as i hit the pedal, i feel a knock, .. the same knock as you would feel if one of your engine mounts are broken or worn out and when you START driving you feel that knock...
But i dont feel it when i START DRIVING. Its only when i re accelerate, even on a straight road.
I don't know what the problem is .. may be one of you geniuses can help me determine and fix this issue.
thank you.

 

you have any video?

 

I would start by looking at the CV joints. De-cell would take the slop out in one direction as the trans winds down and accel could cause a "knock" as the joint slop hits the other way. (Assuming it's an automatic, there would be no slop at a stop at idle in gear because the trans would be applying some presure to the joints already).

After that, maybe worn suspension compnent(s).

If it's an automatic and it happens fairly consistently, try this...

Put the shifter in D1. Give it gas, lift off the pedal and give it gas again. Does it clunk?

Do the same in D2 and, if applicable, D3. If you can't get it to clunk, you can probably rule out the engine moving around or shifting suspension components or CV joint slop.

The next time it happens, pay attention to the engine RPM by watching the tach, or by ear if you don't have a tach. If the RPMs shoot up and suddenly drop when the clunk happens, maybe you are catching the trans 'between' gears? Might be early signs of slipping, too. Just guessing on that because I'm not too familiar with the failure modes of these auto transmissions.





Modified by Perfectionist at 4:30 PM 10/15/2008