When changing my oil, there was apparenlty no oil in the filter and a slight knocking. What could be wrong?

I also have a slight transmission leak, but beyond that and the oil thing everything is fine. How much, ballpark figure, would both of these problems cost to fix?When changing my oil, there was apparenlty no oil in the filter and a slight knocking. What could be wrong?Since oil is pumped into filter-you need to ask did the full amount drain out of pan when changing? Did U somehow allow the oil to leak out of the filter as u removed it?



I don't believe there is such a thing as %26quot;a slight knocking%26quot; in an engine as it is always a sign of excessive clearance. That said engines have gone thousands of miles with knocking rods and/or piston slap. These are both internal mechanical problems and usual repair is an engine rebuild.



The trans leak could be a pan gasket or one of several seals, depending on which seal could involve removal of transmission.



The cost depends on the car, parts and labor rates. U really need to give more details for even approximate answer.

Is it really a knocking or something less serious like a miss?

Where is the trans fluid leaking from? front or rear seal, pan? (place sheets of newspaper under car and start)When changing my oil, there was apparenlty no oil in the filter and a slight knocking. What could be wrong?Oil could just be low volume so filling it to proper amount may fix that. The transmission may just be bad gasket which could be changed at next fluid change or loose bolt so that could be minimal also.When changing my oil, there was apparenlty no oil in the filter and a slight knocking. What could be wrong?may be there's low amount of oil or low quality oil or may be there is oil leakage.

see to itWhen changing my oil, there was apparenlty no oil in the filter and a slight knocking. What could be wrong?Maybe the oil in the filter drained back into the engine. This doesn't sound unsual. What kind of knocking are you talking about? Valves? An hourly rate may apply to fixing the transmission. Last time I had something done it was $80 an hour. Depends on the car also.When changing my oil, there was apparenlty no oil in the filter and a slight knocking. What could be wrong?This SLIGHT knocking did not last for more then a few seconds right. If so, there is NO issue here. Oil filters, unlike fuel filters in diesel engines, do NOT need to be primed before starting the engine. All the Nervous Nellies out there will tell you otherwise but it is not true. If the engine is NOT now knocking then it is okay.



When you say transmission leak, we need to know type of car, front or rear wheel drive, and from WHERE the leak is coming from, otherwise an estimate would be all over the place.