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You are welcome! Scoring is extremely common on transmissions because of the abrasives off of the clutches. For manuals with a lubricant pump they experience the same kind of damage but from syncros and gear wear. Transmissions gears are generally tighter at .002-.004 clearance on the tooth-tooth and the width clearance is about the same.

You could, alot of these techniques are feel techniques so what you get will vary based on how much you have used feeler gauges. The gears should not abnormally wear or change appreciable after you run them. So brand new or after the fact should give you the same result. The manufacturer should be able to provide the specification. In most applications between .002 and .006 on the tip to tip, Body between .002-.006, and width clearance from .002-.001 are typical.

@@thetruechaos , thanks a lot Travis. That gives me something to go on and if I don't feel confident with the feeler gauges, I'll seek somebody with experience to inspect it.

Factory specification for width clearance is between 25µ-100µ depending on the vehicle. This inspection process is now depreciated for us, but is still an excellent guide for people who are interested in verifying your gerotor assemblies.

Hey Tim, let me do another video on this. I'll explain about shimming a little bit more. I believe we use M8 washers in house, every washer adds between 5-8 PSI, and these are located under the spring on the relief valve of the pump.

Good question?

@@99zman Scratches come in a couple of different flavors. There are lap marks which are where very small pieces of debris that make something you can see but cannot feel, and then there are large debris marks which actually gouge the surface. If the gouge is from one side to the other, you will lose some pressure from it. More often the issue is just wear, unseen uniform wear can build up on the oil pump housings and cause excessive clearance. Its recommended to replace the housing if it has more then 50k miles on it.