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Transmission failure caused by lift?

893 Views 5 Replies 6 Participants Last post by  jd96
2012 Titan with 40,000 miles. 3" leveling kit front, 1.5" back, with 33" tires. Nissan dealership blames lift/wheels for transmission failure. Rough Country says neither the lift or tires are cause for trans failure. Dealership suggests gearing & tuning. Should I be concerned if I don't heed their warning? Or, is it likely just a bad trans?
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I've been lifted since 2006 and just over 100k on the lift. Long tubes, high flows, and tuned for about 30k. No transmission issues. I drain and fill the tranny every 5th oil change (5k intervals). YMMV.
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