I have seen very good results with moly paste on the splines on the bendix helical gear and also on the flywheel teeth - engages quietly and firmly - The paste you can buy at a honda store - its what they recommend to use on the final drive line of a Honda Goldwing, its also used in assembling engines and also on brake work in Honda.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)