I always stick my pinkie finger in it and feel for roughness or burrs. If you have a pilot shaft for clutch replacement you can test fit it to see how tight it is. If it is a roller bearing type I always look at the input shaft on the trans for any signs of wear. If all is well a little high temp lube in it and put it back together.
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04 Explorer Sport Trac
05 Ford Focus
05 Cashmire Thunderbird
65 F100 Short Box
08 Honda Goldwing
Ford Master with 40 years experience.
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