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Originally Posted by bigbadram51
Depending on how big of tire, and what the gear ratio is, can def. help tranny life. large tires and tall gears can make it shift alot at higher speeds. Part of the blame is the 4L60E, which although not a terrible tranny, not the strongest of the bunch. What size tire is he running?
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Tire size is LT305/70R16. Tires were new when we bought the truck so I do not know if previous owner had any problems. We will pay a lot more attention to RPM and what speeds shifting is taken place at. Transmission guy should be able to have an idea here with test drive ? thx