Occasionally6 -- My point was more that two extra shifts would cost 1 second at the traps. Not a point I should expect to resonate on a forum about eco-modding.
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VW transaxles have a larger gap between 2nd and 3rd. When I got a 5-speed conversion, it lowered third and had a 'low 4th' and a 'high 4th'. Fifth wasn't much use below 65-80, but it was a joy around town because you spent more time with two gears to choose from against 35-45mph speed limits.