Thinking about getting one for my FG. The one on my Bird is getting long in the tooth also so it could probably use replacing. What are people using? How far does the signal reach. From the reviews I read on Amazon, some are having problems with signal strength even in a crew cab truck. In both those vehicles, I'd probably also want to keep it on when I'm driving, not just when I'm backing up. Is that a problem with these systems? Opinions?

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13