How hard r opg to do and what do I need Besides just the gears...gasket and so on...o going on a 2011 stang

 

What? Never heard of "OPG".

If you are asking about rear gears, they are not exactly a "first time DIY project". You need to know what you are doing to properly set them up and get the pinion depth correct.

 

Oil pump gears....

 

So the question is "how hard are oil pump gears to replace".

Never done it myself but maybe someone will be chime in with an explanation

 

Oil pumps are manufactured with specifically-close tolerances, which makes simple drop-in replacement of gears an "iffy" thing which I, myself, would not likely do. Another point to be made is that most, but not all, oil pumps have housings made of aluminum alloy, and gears of steel. The housing wears out faster than the gears, thus gear replacement makes little sense. Replacing the entire pump is the best practical move, if more oil pressure/volume is desired where the old pump is at fault.

Mellings used to (and may still) make replacement high-volume pumps with housings made of cast iron. These are superior. I installed one in my 289 many years ago. The pump body was visibly higher than the factory pump, due to taller gears. Word of caution: After several hundred miles of ooeration, engine quit. Distributor rotor stationary when cranking. Factory-installed spring-type dowel pin securing gear to distributor shaft had sheared off. Replaced with solid steel pin.

 

It's a big job and requires mechanical aptitude. If timing is reset wrong engine damage may/will occur.

http://iihs.net/fsm/?d=829&f=Oil%20Pump.pdf

 

you wouldn't happen to have a link for the 15-17s would you tw1234?

 

Sorry I don't. Someone else may be able to verify if the 2011 5.0L procedure would be the same as the 15-17.