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3.08 to 4.56 Gear swap issues? - 6.2 Tahoe 2018


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Someone please help me / give me some advice.......

 

I have a 2018 tahoe 70K miles ... 7inch FTS Lift, 35s mud tires , 22rims

 

I lifted it and put 456 Yukon gears in it... Now when I am driving the truck is making a howling / backsplash sound.... 

I'm not getting shakes/vibration with the truck that I can tell... its just a strange howling/back splash sound at certain speed/ deceleration.... 

 

Has anyone had this issue.... I cant seem to figure out what it is...

 

Drive shaft? pinion angle? any thoughts would be really helpful

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