My truck has went through 7 starters in the last month. The teeth on the starters just keep getting shaved off.

 

How's the flywheel teeth? If they are shot the starter won't stand a chance. You're getting the correct starter? Manual and automatic are slightly different as is the shim plate between the engine and transmission different for manuals and autos.

 

Ok I have a brand new flywheel on it it's an automatic it is the correct starter I believe