Quote:
Originally Posted by TrackRat
^^^ FWIW, wearing both sides of the gear teeth causes more backlash in the gears which is undesirable. Engine braking really has no effect on keeping the combustion chambers clean. Most modern OEM EFI designs shut off the fuel on closed throttle deceleration (overrun), so only air is run thru the engine until the throttle is opened or the engine is close to idle speed.
That being said down shifting at the proper RPM is just fine and normal. The slight increase in wear of the clutch and trans is normal. Abusive down shifting is totally different and to be avoided.
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Hey Track, shows you how old school I am.
Dave