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5th gear change

1144 Views 2 Replies 3 Participants Last post by  rickb, 
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I was wondering what mileage increase anyone has seen with the .658 5th gear. I have a 2000 jetta tdi.
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chittychittybangbang
I saw none but rpm were lower. It was a fun project but if I had to do it again, I would have gone with slightly larger tires. It really depends on how often you drive highway. Some have claimed a small increase.
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